Archive billsplit and everything coupled to it

The coupled case the previous archive commit deferred. billsplit is not
just a directory: a coverage package exists only to gate it, app_icons
holds a registry entry pointing into it, a CI workflow builds it, and
.binary-allowlist / .gitignore carry a paired set of rules for its
launcher icons. Removing the directory alone would have failed the 100%
coverage gate and left three configs naming a missing path.

So all of it goes in one commit:

  billsplit/                        73 files
  python_pkg/billsplit_coverage/     5 files, gated billsplit only
  .github/workflows/billsplit-ci.yml
  the app_icons AppIcon(key="billsplit") entry
  the .binary-allowlist patterns and their .gitignore ! overrides
  the .prettierignore fixture line

billsplit/ and billsplit_coverage/ were extracted in a single filter-repo
pass (8 commits, matching the monorepo) and pushed to
github.com/kuhyx/testsAndMisc-archive, where the coverage package joins
the archive's existing python_pkg/ tree. Presence was confirmed through
the GitHub API before anything was deleted here.

.binary-allowlist is now empty of patterns -- billsplit's icons were its
only entries. The policy header stays and records that no exception is in
force, and check_no_binaries.sh still exits 0 on a comment-only file.

Verified: 2095 tests pass at 100% coverage, down from 2114 by exactly the
19 billsplit_coverage tests. Depth violations 451 -> 417.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PJrqKERAo5QUeEHWS5Asgp

.github/workflows/billsplit-ci.yml

@@ -1,43 +0,0 @@
-name: billsplit CI
-
-# Relocated here from billsplit/.github/workflows/ci.yaml when the app moved
-# into this monorepo — GitHub only reads workflows from the repository root,
-# so the nested copy would have been inert.
-
-on:
-  push:
-    branches: [main]
-    paths:
-      - "billsplit/**"
-      - ".github/workflows/billsplit-ci.yml"
-  pull_request:
-    branches: [main]
-    paths:
-      - "billsplit/**"
-      - ".github/workflows/billsplit-ci.yml"
-
-defaults:
-  run:
-    working-directory: billsplit
-
-jobs:
-  quality:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-      - uses: subosito/flutter-action@v2
-        with:
-          channel: stable
-      - run: flutter pub get
-      - name: Format (fails on diff)
-        run: dart format --set-exit-if-changed .
-      - name: Analyze (infos are fatal)
-        run: flutter analyze --fatal-infos
-      - name: Tests with coverage
-        run: flutter test --coverage
-      # Runs from the repository root: every Python file in this repo lives
-      # under python_pkg/, so the gate is a module there rather than a script
-      # inside the app. It resolves billsplit/ from its own location.
-      - name: Enforce 100% line coverage
-        working-directory: .
-        run: python3 -m python_pkg.billsplit_coverage

billsplit/.gitignore

@@ -1,45 +0,0 @@
-# Miscellaneous
-*.class
-*.log
-*.pyc
-*.swp
-.DS_Store
-.atom/
-.build/
-.buildlog/
-.history
-.svn/
-.swiftpm/
-migrate_working_dir/
-
-# IntelliJ related
-*.iml
-*.ipr
-*.iws
-.idea/
-
-# The .vscode folder contains launch configuration and tasks you configure in
-# VS Code which you may wish to be included in version control, so this line
-# is commented out by default.
-#.vscode/
-
-# Flutter/Dart/Pub related
-**/doc/api/
-**/ios/Flutter/.last_build_id
-.dart_tool/
-.flutter-plugins-dependencies
-.pub-cache/
-.pub/
-/build/
-/coverage/
-
-# Symbolication related
-app.*.symbols
-
-# Obfuscation related
-app.*.map.json
-
-# Android Studio will place build artifacts here
-/android/app/debug
-/android/app/profile
-/android/app/release

billsplit/.metadata

@@ -1,42 +0,0 @@
-# This file tracks properties of this Flutter project.
-# Used by Flutter tool to assess capabilities and perform upgrades etc.
-#
-# This file should be version controlled and should not be manually edited.
-
-version:
-  revision: "058e0af2c2b57e369d905a03ac9748b0ebf543c6"
-  channel: "stable"
-
-project_type: app
-
-# Tracks metadata for the flutter migrate command
-migration:
-  platforms:
-    - platform: root
-      create_revision: 058e0af2c2b57e369d905a03ac9748b0ebf543c6
-      base_revision: 058e0af2c2b57e369d905a03ac9748b0ebf543c6
-    - platform: android
-      create_revision: 058e0af2c2b57e369d905a03ac9748b0ebf543c6
-      base_revision: 058e0af2c2b57e369d905a03ac9748b0ebf543c6
-    - platform: ios
-      create_revision: 058e0af2c2b57e369d905a03ac9748b0ebf543c6
-      base_revision: 058e0af2c2b57e369d905a03ac9748b0ebf543c6
-    - platform: linux
-      create_revision: 058e0af2c2b57e369d905a03ac9748b0ebf543c6
-      base_revision: 058e0af2c2b57e369d905a03ac9748b0ebf543c6
-    - platform: macos
-      create_revision: 058e0af2c2b57e369d905a03ac9748b0ebf543c6
-      base_revision: 058e0af2c2b57e369d905a03ac9748b0ebf543c6
-    - platform: windows
-      create_revision: 058e0af2c2b57e369d905a03ac9748b0ebf543c6
-      base_revision: 058e0af2c2b57e369d905a03ac9748b0ebf543c6
-
-  # User provided section
-
-  # List of Local paths (relative to this file) that should be
-  # ignored by the migrate tool.
-  #
-  # Files that are not part of the templates will be ignored by default.
-  unmanaged_files:
-    - 'lib/main.dart'
-    - 'ios/Runner.xcodeproj/project.pbxproj'

billsplit/README.md

@@ -1,81 +0,0 @@
-# BillSplit
-
-Flutter app (mobile + desktop) for splitting shop receipts between people —
-including the drinkers vs non-drinkers case — with Biedronka e-paragon import
-and .xlsx export.
-
-## Features
-
-- **People roster** with a per-person _drinks alcohol_ toggle, plus arbitrary
-  **groups** (tags) like "meat eaters".
-- **Receipts**: import a Polish fiscal e-receipt JSON (`e-paragon`,
-  JPK_KASA_PARAGON_v2-0 — the file the Biedronka app exports; the embedded JWS
-  payload is decoded, signature not verified) or build one manually. Multiple
-  receipts persist locally (`state.json` in app documents).
-- **Per-item assignment**: each item is split among _Everyone / Drinkers /
-  Non-drinkers / a group / hand-picked people_. Alcohol is auto-detected on
-  import (wódka/piwo/wino/… keywords) and defaults to drinkers only; deposits
-  (kaucja) become their own line split among everyone. Category and assignment
-  are always editable — the keyword detection is a default, not a decision.
-- **Grosz-exact math**: every item's shares sum to exactly the item total
-  (largest-remainder distribution), so per-person totals reconcile with the
-  receipt to the grosz — no floating point drift.
-- **Totals view**: per person, with alcohol / rest breakdown, unassigned-item
-  warnings, and a reconciliation check against the paid amount.
-- **Export .xlsx**: one row per item with a 1/0 person matrix plus a summary —
-  same layout as the hand-made spreadsheet this app grew out of. Matrix and
-  summary are exported values (the app is the calculator); column totals are
-  live SUM formulas.
-
-## Running
-
-`android/` is the only platform runner folder the repo tracks. Generate the
-others locally for whatever you want to run on:
-
-```sh
-cd billsplit
-flutter create . --platforms=linux,windows,macos,ios
-flutter pub get
-flutter run          # picks a connected device / desktop
-```
-
-Those four directories are gitignored, so a regenerated runner stays local
-instead of being committed back. CI never builds them: `billsplit-ci.yml` runs
-`flutter analyze` and `flutter test` only.
-
-Tested with Flutter 3.44.8 / Dart 3.10.
-
-## Tests
-
-```sh
-flutter test
-```
-
-Covers: parsing the real sample receipt in `test/fixtures/` (49 items +
-deposit, totals 590.55 + 7.00 = 597.55 zł), split invariants incl. a 500-case
-fuzz of the remainder distribution, assignment-mode resolution, and xlsx
-generation (the test writes `build/test_export.xlsx` for external inspection).
-
-## Design notes / edge cases
-
-- Money is `int` grosze end to end; formatting happens only at the UI edge.
-- An item resolving to zero people (e.g. "non-drinkers" on an all-drinker
-  receipt) is **excluded from totals and loudly flagged**, never silently
-  dropped into someone's bill.
-- Deleting a person prunes them from groups, receipt participants and custom
-  assignments; deleting a group falls back affected items to _Everyone_.
-- Assignment modes are stored symbolically (not as materialized ID sets), so
-  adding a person later automatically includes them in _Everyone_ items.
-  Touching a person checkbox materializes the current set and switches the
-  item to _custom_.
-- `paidTotalGr` (what the card was charged) is kept separately from the item
-  sum; a mismatch shows red in Totals instead of being "fixed" silently.
-
-## Quality gates (enforced in CI)
-
-- `dart format --set-exit-if-changed .` — formatting is canonical
-- `flutter analyze --fatal-infos` — `very_good_analysis` + `strict-casts`,
-  `strict-inference`, `strict-raw-types`; any info fails the build
-- `flutter test --coverage` + `tool/coverage_check.py` — **100% line
-  coverage of `lib/` is mandatory**; the gate also fails if a lib file is
-  never executed by any test

billsplit/analysis_options.yaml

@@ -1,15 +0,0 @@
-include: package:very_good_analysis/analysis_options.yaml
-
-analyzer:
-  exclude:
-    - build/**
-    - android/**
-    - ios/**
-    - web/**
-    - windows/**
-    - macos/**
-    - linux/**
-  language:
-    strict-casts: true
-    strict-inference: true
-    strict-raw-types: true

billsplit/android/.gitignore

@@ -1,14 +0,0 @@
-gradle-wrapper.jar
-/.gradle
-/captures/
-/gradlew
-/gradlew.bat
-/local.properties
-GeneratedPluginRegistrant.java
-.cxx/
-
-# Remember to never publicly share your keystore.
-# See https://flutter.dev/to/reference-keystore
-key.properties
-**/*.keystore
-**/*.jks

billsplit/android/app/build.gradle.kts

@@ -1,45 +0,0 @@
-plugins {
-    id("com.android.application")
-    // The Flutter Gradle Plugin must be applied after the Android and Kotlin Gradle plugins.
-    id("dev.flutter.flutter-gradle-plugin")
-}
-
-android {
-    namespace = "dev.kuhy.billsplit"
-    compileSdk = flutter.compileSdkVersion
-    ndkVersion = flutter.ndkVersion
-
-    compileOptions {
-        sourceCompatibility = JavaVersion.VERSION_17
-        targetCompatibility = JavaVersion.VERSION_17
-    }
-
-    defaultConfig {
-        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
-        applicationId = "dev.kuhy.billsplit"
-        // You can update the following values to match your application needs.
-        // For more information, see: https://flutter.dev/to/review-gradle-config.
-        minSdk = flutter.minSdkVersion
-        targetSdk = flutter.targetSdkVersion
-        versionCode = flutter.versionCode
-        versionName = flutter.versionName
-    }
-
-    buildTypes {
-        release {
-            // TODO: Add your own signing config for the release build.
-            // Signing with the debug keys for now, so `flutter run --release` works.
-            signingConfig = signingConfigs.getByName("debug")
-        }
-    }
-}
-
-kotlin {
-    compilerOptions {
-        jvmTarget = org.jetbrains.kotlin.gradle.dsl.JvmTarget.JVM_17
-    }
-}
-
-flutter {
-    source = "../.."
-}

billsplit/android/app/src/debug/AndroidManifest.xml

@@ -1,7 +0,0 @@
-<manifest xmlns:android="http://schemas.android.com/apk/res/android">
-    <!-- The INTERNET permission is required for development. Specifically,
-         the Flutter tool needs it to communicate with the running application
-         to allow setting breakpoints, to provide hot reload, etc.
-    -->
-    <uses-permission android:name="android.permission.INTERNET"/>
-</manifest>

billsplit/android/app/src/main/AndroidManifest.xml

@@ -1,45 +0,0 @@
-<manifest xmlns:android="http://schemas.android.com/apk/res/android">
-    <application
-        android:label="billsplit"
-        android:name="${applicationName}"
-        android:icon="@mipmap/ic_launcher">
-        <activity
-            android:name=".MainActivity"
-            android:exported="true"
-            android:launchMode="singleTop"
-            android:taskAffinity=""
-            android:theme="@style/LaunchTheme"
-            android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
-            android:hardwareAccelerated="true"
-            android:windowSoftInputMode="adjustResize">
-            <!-- Specifies an Android theme to apply to this Activity as soon as
-                 the Android process has started. This theme is visible to the user
-                 while the Flutter UI initializes. After that, this theme continues
-                 to determine the Window background behind the Flutter UI. -->
-            <meta-data
-              android:name="io.flutter.embedding.android.NormalTheme"
-              android:resource="@style/NormalTheme"
-              />
-            <intent-filter>
-                <action android:name="android.intent.action.MAIN"/>
-                <category android:name="android.intent.category.LAUNCHER"/>
-            </intent-filter>
-        </activity>
-        <!-- Don't delete the meta-data below.
-             This is used by the Flutter tool to generate GeneratedPluginRegistrant.java -->
-        <meta-data
-            android:name="flutterEmbedding"
-            android:value="2" />
-    </application>
-    <!-- Required to query activities that can process text, see:
-         https://developer.android.com/training/package-visibility and
-         https://developer.android.com/reference/android/content/Intent#ACTION_PROCESS_TEXT.
-
-         In particular, this is used by the Flutter engine in io.flutter.plugin.text.ProcessTextPlugin. -->
-    <queries>
-        <intent>
-            <action android:name="android.intent.action.PROCESS_TEXT"/>
-            <data android:mimeType="text/plain"/>
-        </intent>
-    </queries>
-</manifest>

billsplit/android/app/src/main/kotlin/dev/kuhy/billsplit/MainActivity.kt

@@ -1,5 +0,0 @@
-package dev.kuhy.billsplit
-
-import io.flutter.embedding.android.FlutterActivity
-
-class MainActivity : FlutterActivity()

billsplit/android/app/src/main/res/drawable-v21/launch_background.xml

@@ -1,12 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- Modify this file to customize your launch splash screen -->
-<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
-    <item android:drawable="?android:colorBackground" />
-
-    <!-- You can insert your own image assets here -->
-    <!-- <item>
-        <bitmap
-            android:gravity="center"
-            android:src="@mipmap/launch_image" />
-    </item> -->
-</layer-list>

billsplit/android/app/src/main/res/drawable/launch_background.xml

@@ -1,12 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- Modify this file to customize your launch splash screen -->
-<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
-    <item android:drawable="@android:color/white" />
-
-    <!-- You can insert your own image assets here -->
-    <!-- <item>
-        <bitmap
-            android:gravity="center"
-            android:src="@mipmap/launch_image" />
-    </item> -->
-</layer-list>

billsplit/android/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml

@@ -1,14 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
-  <background android:drawable="@color/ic_launcher_background"/>
-  <foreground>
-      <inset
-          android:drawable="@drawable/ic_launcher_foreground"
-          android:inset="16%" />
-  </foreground>
-  <monochrome>
-      <inset
-          android:drawable="@drawable/ic_launcher_monochrome"
-          android:inset="16%" />
-  </monochrome>
-</adaptive-icon>

billsplit/android/app/src/main/res/values-night/styles.xml

@@ -1,18 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<resources>
-    <!-- Theme applied to the Android Window while the process is starting when the OS's Dark Mode setting is on -->
-    <style name="LaunchTheme" parent="@android:style/Theme.Black.NoTitleBar">
-        <!-- Show a splash screen on the activity. Automatically removed when
-             the Flutter engine draws its first frame -->
-        <item name="android:windowBackground">@drawable/launch_background</item>
-    </style>
-    <!-- Theme applied to the Android Window as soon as the process has started.
-         This theme determines the color of the Android Window while your
-         Flutter UI initializes, as well as behind your Flutter UI while its
-         running.
-
-         This Theme is only used starting with V2 of Flutter's Android embedding. -->
-    <style name="NormalTheme" parent="@android:style/Theme.Black.NoTitleBar">
-        <item name="android:windowBackground">?android:colorBackground</item>
-    </style>
-</resources>

billsplit/android/app/src/main/res/values/colors.xml

@@ -1,4 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<resources>
-    <color name="ic_launcher_background">#211D1B</color>
-</resources>

billsplit/android/app/src/main/res/values/styles.xml

@@ -1,18 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<resources>
-    <!-- Theme applied to the Android Window while the process is starting when the OS's Dark Mode setting is off -->
-    <style name="LaunchTheme" parent="@android:style/Theme.Light.NoTitleBar">
-        <!-- Show a splash screen on the activity. Automatically removed when
-             the Flutter engine draws its first frame -->
-        <item name="android:windowBackground">@drawable/launch_background</item>
-    </style>
-    <!-- Theme applied to the Android Window as soon as the process has started.
-         This theme determines the color of the Android Window while your
-         Flutter UI initializes, as well as behind your Flutter UI while its
-         running.
-
-         This Theme is only used starting with V2 of Flutter's Android embedding. -->
-    <style name="NormalTheme" parent="@android:style/Theme.Light.NoTitleBar">
-        <item name="android:windowBackground">?android:colorBackground</item>
-    </style>
-</resources>

billsplit/android/app/src/profile/AndroidManifest.xml

@@ -1,7 +0,0 @@
-<manifest xmlns:android="http://schemas.android.com/apk/res/android">
-    <!-- The INTERNET permission is required for development. Specifically,
-         the Flutter tool needs it to communicate with the running application
-         to allow setting breakpoints, to provide hot reload, etc.
-    -->
-    <uses-permission android:name="android.permission.INTERNET"/>
-</manifest>

billsplit/android/build.gradle.kts

@@ -1,24 +0,0 @@
-allprojects {
-    repositories {
-        google()
-        mavenCentral()
-    }
-}
-
-val newBuildDir: Directory =
-    rootProject.layout.buildDirectory
-        .dir("../../build")
-        .get()
-rootProject.layout.buildDirectory.value(newBuildDir)
-
-subprojects {
-    val newSubprojectBuildDir: Directory = newBuildDir.dir(project.name)
-    project.layout.buildDirectory.value(newSubprojectBuildDir)
-}
-subprojects {
-    project.evaluationDependsOn(":app")
-}
-
-tasks.register<Delete>("clean") {
-    delete(rootProject.layout.buildDirectory)
-}

billsplit/android/gradle.properties

@@ -1,24 +0,0 @@
-# Memory budget. The Flutter template ships `-Xmx8G -XX:MaxMetaspaceSize=4G`
-# here, which asks for more than this 7.6 GB machine has and got a whole
-# session OOM-killed. What actually brings the footprint down is cutting the
-# NUMBER of JVMs, not just the heap: without these flags Gradle runs a daemon
-# plus a separate Kotlin compile daemon plus workers, each with its own heap.
-#
-# Budget for anything run on this machine is <= 2 GB. Verify with PSS summed
-# from /proc/<pid>/smaps_rollup across the build's own processes — system-wide
-# "used" includes everything else, and RSS double-counts shared pages.
-org.gradle.jvmargs=-Xmx768m -XX:MaxMetaspaceSize=512m -XX:ReservedCodeCacheSize=128m -XX:+HeapDumpOnOutOfMemoryError
-# Compile Kotlin inside the Gradle process instead of spawning a second daemon.
-kotlin.compiler.execution.strategy=in-process
-# No persistent daemon, no parallel project execution, one worker.
-org.gradle.daemon=false
-org.gradle.parallel=false
-org.gradle.workers.max=1
-
-android.useAndroidX=true
-# This newDsl flag was added by the Flutter template
-android.newDsl=false
-# This builtInKotlin flag was added by the Flutter template. Kept false to
-# match every sibling app (todo, habit_stack, home_inventory, diet_guard_app),
-# which all build fine on this same AGP 9.0.1 / Gradle 9.1.0 pair.
-android.builtInKotlin=false

billsplit/android/gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +0,0 @@
-distributionBase=GRADLE_USER_HOME
-distributionPath=wrapper/dists
-zipStoreBase=GRADLE_USER_HOME
-zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-9.1.0-all.zip

billsplit/android/settings.gradle.kts

@@ -1,26 +0,0 @@
-pluginManagement {
-    val flutterSdkPath =
-        run {
-            val properties = java.util.Properties()
-            file("local.properties").inputStream().use { properties.load(it) }
-            val flutterSdkPath = properties.getProperty("flutter.sdk")
-            require(flutterSdkPath != null) { "flutter.sdk not set in local.properties" }
-            flutterSdkPath
-        }
-
-    includeBuild("$flutterSdkPath/packages/flutter_tools/gradle")
-
-    repositories {
-        google()
-        mavenCentral()
-        gradlePluginPortal()
-    }
-}
-
-plugins {
-    id("dev.flutter.flutter-plugin-loader") version "1.0.0"
-    id("com.android.application") version "9.0.1" apply false
-    id("org.jetbrains.kotlin.android") version "2.3.20" apply false
-}
-
-include(":app")

billsplit/assets/icon/icon.svg

@@ -1,6 +0,0 @@
-<svg xmlns="http://www.w3.org/2000/svg" width="1024" height="1024" viewBox="0 0 1024 1024">
-  <rect width="1024" height="1024" fill="#211D1B"/>
-  <g fill="none" stroke="#B8862E" stroke-width="72" stroke-linecap="round" stroke-linejoin="round" transform="translate(0,-5)">
-    <path fill="#B8862E" fill-rule="evenodd" stroke="none" d="M 312 282 L 712 282 L 712 706 L 678 752 L 645 706 L 612 752 L 578 706 L 545 752 L 512 706 L 478 752 L 445 706 L 412 752 L 378 706 L 345 752 L 312 706 Z M 482 350 A 30 30 0 1 0 542 350 A 30 30 0 1 0 482 350 Z M 482 446 A 30 30 0 1 0 542 446 A 30 30 0 1 0 482 446 Z M 482 542 A 30 30 0 1 0 542 542 A 30 30 0 1 0 482 542 Z M 482 638 A 30 30 0 1 0 542 638 A 30 30 0 1 0 482 638 Z"/>
-  </g>
-</svg>

billsplit/assets/icon/icon_foreground.svg

@@ -1,5 +0,0 @@
-<svg xmlns="http://www.w3.org/2000/svg" width="1024" height="1024" viewBox="0 0 1024 1024">
-  <g fill="none" stroke="#B8862E" stroke-width="72" stroke-linecap="round" stroke-linejoin="round" transform="translate(0,-5)">
-    <path fill="#B8862E" fill-rule="evenodd" stroke="none" d="M 312 282 L 712 282 L 712 706 L 678 752 L 645 706 L 612 752 L 578 706 L 545 752 L 512 706 L 478 752 L 445 706 L 412 752 L 378 706 L 345 752 L 312 706 Z M 482 350 A 30 30 0 1 0 542 350 A 30 30 0 1 0 482 350 Z M 482 446 A 30 30 0 1 0 542 446 A 30 30 0 1 0 482 446 Z M 482 542 A 30 30 0 1 0 542 542 A 30 30 0 1 0 482 542 Z M 482 638 A 30 30 0 1 0 542 638 A 30 30 0 1 0 482 638 Z"/>
-  </g>
-</svg>

billsplit/assets/icon/icon_monochrome.svg

@@ -1,5 +0,0 @@
-<svg xmlns="http://www.w3.org/2000/svg" width="1024" height="1024" viewBox="0 0 1024 1024">
-  <g fill="none" stroke="#FFFFFF" stroke-width="72" stroke-linecap="round" stroke-linejoin="round" transform="translate(0,-5)">
-    <path fill="#FFFFFF" fill-rule="evenodd" stroke="none" d="M 312 282 L 712 282 L 712 706 L 678 752 L 645 706 L 612 752 L 578 706 L 545 752 L 512 706 L 478 752 L 445 706 L 412 752 L 378 706 L 345 752 L 312 706 Z M 482 350 A 30 30 0 1 0 542 350 A 30 30 0 1 0 482 350 Z M 482 446 A 30 30 0 1 0 542 446 A 30 30 0 1 0 482 446 Z M 482 542 A 30 30 0 1 0 542 542 A 30 30 0 1 0 482 542 Z M 482 638 A 30 30 0 1 0 542 638 A 30 30 0 1 0 482 638 Z"/>
-  </g>
-</svg>

billsplit/lib/domain/assignment.dart

@@ -1,200 +0,0 @@
-/// Assignment and the split calculation.
-///
-/// Split out of models.dart to keep it under the 250-line cap. A `part`
-/// because Dart privates are library-scoped.
-
-part of 'models.dart';
-
-/// The assignment of one item: a symbolic mode plus mode-specific data.
-class Assignment {
-  /// Creates an assignment; defaults to [AssignMode.everyone].
-  Assignment({
-    this.mode = AssignMode.everyone,
-    this.groupId,
-    Set<String>? customIds,
-  }) : customIds = customIds ?? <String>{};
-
-  /// Restores an assignment from its [toJson] map.
-  factory Assignment.fromJson(Map<String, dynamic> j) => Assignment(
-        mode: AssignMode.values.asNameMap()[j['mode']] ?? AssignMode.everyone,
-        groupId: j['groupId'] as String?,
-        customIds: (j['customIds'] as List? ?? const <dynamic>[])
-            .cast<String>()
-            .toSet(),
-      );
-
-  /// Current mode.
-  AssignMode mode;
-
-  /// Group id when [mode] is [AssignMode.group].
-  String? groupId;
-
-  /// Hand-picked person ids when [mode] is [AssignMode.custom].
-  final Set<String> customIds;
-
-  /// JSON representation for persistence.
-  Map<String, dynamic> toJson() => {
-        'mode': mode.name,
-        if (groupId != null) 'groupId': groupId,
-        'customIds': customIds.toList(),
-      };
-}
-
-/// Standard item categories. [Item.category] is free text so users can add
-/// their own; these constants are the ones the importer produces.
-abstract final class Categories {
-  /// Alcoholic drinks — default to drinkers only.
-  static const alcohol = 'Alcohol';
-
-  /// Mixers (tonic, limes, …) — tagged for visibility, split among everyone.
-  static const mixer = 'Mixer';
-
-  /// Returnable bottle deposits (kaucja).
-  static const deposit = 'Deposit';
-
-  /// Anything else.
-  static const general = 'General';
-}
-
-/// One receipt line.
-class Item {
-  /// Creates an item; [totalGr] is the post-discount line total.
-  Item({
-    required this.id,
-    required this.name,
-    required this.totalGr,
-    this.qty = 1,
-    this.unitPriceGr = 0,
-    this.discountGr = 0,
-    this.category = Categories.general,
-    Assignment? assignment,
-  }) : assignment = assignment ?? Assignment();
-
-  /// Restores an item from its [toJson] map.
-  factory Item.fromJson(Map<String, dynamic> j) => Item(
-        id: j['id'] as String,
-        name: j['name'] as String,
-        totalGr: j['totalGr'] as int,
-        qty: (j['qty'] as num? ?? 1).toDouble(),
-        unitPriceGr: j['unitPriceGr'] as int? ?? 0,
-        discountGr: j['discountGr'] as int? ?? 0,
-        category: j['category'] as String? ?? Categories.general,
-        assignment: Assignment.fromJson(
-          (j['assignment'] as Map?)?.cast<String, dynamic>() ?? const {},
-        ),
-      );
-
-  /// Stable unique id.
-  final String id;
-
-  /// Display name.
-  String name;
-
-  /// Final line total after discount — the ground truth used for splitting.
-  int totalGr;
-
-  /// Quantity (may be fractional for weighed goods).
-  double qty;
-
-  /// Unit price in grosze.
-  int unitPriceGr;
-
-  /// Discount already included in [totalGr]; kept for display (<= 0).
-  int discountGr;
-
-  /// Free-text category; see [Categories] for the standard values.
-  String category;
-
-  /// Who shares this item.
-  Assignment assignment;
-
-  /// JSON representation for persistence.
-  Map<String, dynamic> toJson() => {
-        'id': id,
-        'name': name,
-        'totalGr': totalGr,
-        'qty': qty,
-        'unitPriceGr': unitPriceGr,
-        'discountGr': discountGr,
-        'category': category,
-        'assignment': assignment.toJson(),
-      };
-}
-
-/// One shopping receipt with its items and participants.
-class Receipt {
-  /// Creates a receipt; [participantIds] defaults to empty.
-  Receipt({
-    required this.id,
-    required this.title,
-    this.store,
-    DateTime? date,
-    List<Item>? items,
-    Set<String>? participantIds,
-    this.paidTotalGr,
-  })  : date = date ?? DateTime.now(),
-        items = items ?? <Item>[],
-        participantIds = participantIds ?? <String>{};
-
-  /// Restores a receipt from its [toJson] map.
-  factory Receipt.fromJson(Map<String, dynamic> j) => Receipt(
-        id: j['id'] as String,
-        title: j['title'] as String,
-        store: j['store'] as String?,
-        date: DateTime.tryParse(j['date'] as String? ?? '') ?? DateTime.now(),
-        items: (j['items'] as List? ?? const <dynamic>[])
-            .map((e) => Item.fromJson((e as Map).cast<String, dynamic>()))
-            .toList(),
-        participantIds: (j['participantIds'] as List? ?? const <dynamic>[])
-            .cast<String>()
-            .toSet(),
-        paidTotalGr: j['paidTotalGr'] as int?,
-      );
-
-  /// Stable unique id.
-  final String id;
-
-  /// Display title.
-  String title;
-
-  /// Store name, if known.
-  String? store;
-
-  /// Sale date.
-  DateTime date;
-
-  /// Line items.
-  final List<Item> items;
-
-  /// Subset of the roster taking part in this receipt.
-  final Set<String> participantIds;
-
-  /// What was actually paid (incl. deposits) — used for the reconciliation
-  /// check. Null for manual receipts where the user never entered it.
-  int? paidTotalGr;
-
-  /// Sum of all item totals in grosze.
-  int get itemsTotalGr => items.fold(0, (s, i) => s + i.totalGr);
-
-  /// JSON representation for persistence.
-  Map<String, dynamic> toJson() => {
-        'id': id,
-        'title': title,
-        'store': store,
-        'date': date.toIso8601String(),
-        'items': items.map((i) => i.toJson()).toList(),
-        'participantIds': participantIds.toList(),
-        'paidTotalGr': paidTotalGr,
-      };
-}
-
-/// Simple unique id source: time + counter. Good enough for a local,
-/// single-user app.
-class Ids {
-  static int _c = 0;
-
-  /// Returns a new unique id.
-  static String next() =>
-      '${DateTime.now().microsecondsSinceEpoch.toRadixString(36)}'
-      '-${(_c++).toRadixString(36)}';
-}

billsplit/lib/domain/eparagon_fields.dart

@@ -1,124 +0,0 @@
-/// Field extraction helpers for the e-paragon parser.
-///
-/// Split out of eparagon_parser.dart to keep it under the 250-line cap.
-/// A `part` because Dart privates are library-scoped.
-
-part of 'eparagon_parser.dart';
-
-DateTime _saleDate(
-  Map<dynamic, dynamic> paragon,
-  Map<dynamic, dynamic> dokument,
-) {
-  final raw =
-      paragon['zakSprzed'] ?? (dokument['naglowek'] as Map?)?['dataJPK'];
-  if (raw is String) {
-    final d = DateTime.tryParse(raw);
-    if (d != null) return d.toLocal();
-  }
-  return DateTime.now();
-}
-
-String _iso(DateTime d) {
-  final m = d.month.toString().padLeft(2, '0');
-  final day = d.day.toString().padLeft(2, '0');
-  return '${d.year}-$m-$day';
-}
-
-Map<String, dynamic> _extractPayload(String source) {
-  dynamic root;
-  try {
-    root = jsonDecode(source.trim());
-  } on FormatException {
-    // Maybe the user pasted just the JWS token.
-    final p = _tryJws(source.trim());
-    if (p != null) return p;
-    throw EParagonParseException(
-      'Input is neither valid JSON nor a JWS.',
-    );
-  }
-  if (root is Map) {
-    if (root['dokument'] is Map) return root.cast<String, dynamic>();
-    final data = root['data'];
-    if (data is String) {
-      final p = _tryJws(data);
-      if (p != null) return p;
-      throw EParagonParseException('"data" field is not a decodable JWS.');
-    }
-  }
-  throw EParagonParseException(
-    'Unrecognized structure: expected e-paragon wrapper or JPK payload.',
-  );
-}
-
-Map<String, dynamic>? _tryJws(String token) {
-  final parts = token.split('.');
-  if (parts.length != 3) return null;
-  try {
-    final normalized = base64Url.normalize(parts[1]);
-    final decoded = utf8.decode(base64Url.decode(normalized));
-    final obj = jsonDecode(decoded);
-    return obj is Map ? obj.cast<String, dynamic>() : null;
-  } on FormatException {
-    return null;
-  }
-}
-
-Item? _itemFromTowar(Map<String, dynamic> t, List<String> warnings) {
-  var name = (t['nazwa'] as String? ?? '').trim();
-  // Names end with the VAT rate letter, e.g. "Tonic                    A".
-  if (name.length > 2 &&
-      name[name.length - 2] == ' ' &&
-      RegExp(r'[A-G]$').hasMatch(name)) {
-    name = name.substring(0, name.length - 2).trim();
-  }
-  name = name.replaceAll(RegExp(r'\s+'), ' ');
-  if (name.isEmpty) return null;
-
-  final total = _asIntOrNull(t['brutto']);
-  if (total == null) {
-    warnings.add('Skipped "$name": missing brutto amount.');
-    return null;
-  }
-  final unit = _asIntOrNull(t['cena']) ?? 0;
-  final qty = _parseQty(t['ilosc']);
-  final rabat = t['rabat'];
-  final discount = rabat is Map ? (_asIntOrNull(rabat['wart']) ?? 0) : 0;
-
-  final lower = name.toLowerCase();
-  var category = Categories.general;
-  var assignment = Assignment();
-  if (_alcoholKeywords.any(lower.contains)) {
-    category = Categories.alcohol;
-    assignment = Assignment(mode: AssignMode.drinkers);
-  } else if (_mixerKeywords.any(lower.contains)) {
-    category = Categories.mixer; // still split among everyone by default
-  }
-
-  return Item(
-    id: Ids.next(),
-    name: name,
-    totalGr: total,
-    qty: qty,
-    unitPriceGr: unit,
-    discountGr: discount,
-    category: category,
-    assignment: assignment,
-  );
-}
-
-double _parseQty(dynamic v) {
-  if (v is num) return v.toDouble();
-  if (v is String) {
-    return double.tryParse(v.replaceAll(',', '.').trim()) ?? 1;
-  }
-  return 1;
-}
-
-int _asInt(dynamic v) => _asIntOrNull(v) ?? 0;
-
-int? _asIntOrNull(dynamic v) {
-  if (v is int) return v;
-  if (v is num) return v.round();
-  if (v is String) return int.tryParse(v);
-  return null;
-}

billsplit/lib/domain/eparagon_parser.dart

@@ -1,177 +0,0 @@
-/// Parser for Polish fiscal e-receipts (e-paragon / JPK_KASA_PARAGON_v2-0),
-/// e.g. the JSON files produced by the Biedronka app.
-///
-/// Accepted inputs:
-///  * the full wrapper JSON containing a `data` field with a JWS
-///    (header.payload.signature, base64url) whose payload is the JPK document;
-///  * the decoded JPK payload itself (an object with `dokument.paragon`);
-///  * a bare JWS token string.
-///
-/// The signature is NOT verified — this app only reads the contents.
-library;
-
-import 'dart:convert';
-
-import 'package:billsplit/domain/models.dart';
-
-part 'eparagon_fields.dart';
-
-/// A parsed receipt plus non-fatal [warnings] collected on the way.
-class EParagonResult {
-  /// Bundles a parsed [receipt] with its [warnings].
-  EParagonResult({required this.receipt, required this.warnings});
-
-  /// The parsed receipt.
-  final Receipt receipt;
-
-  /// Human-readable warnings (e.g. sum mismatches, skipped lines).
-  final List<String> warnings;
-}
-
-/// Thrown when the input cannot be interpreted as an e-paragon.
-class EParagonParseException implements Exception {
-  /// Creates the exception with a user-facing [message].
-  EParagonParseException(this.message);
-
-  /// User-facing description of what went wrong.
-  final String message;
-
-  @override
-  String toString() => 'EParagonParseException: $message';
-}
-
-const _alcoholKeywords = [
-  'wódk',
-  'wodka',
-  'vodka',
-  'piwo',
-  'wino',
-  'whisk',
-  'likier',
-  'nalewk',
-  'cydr',
-  ' rum',
-  'gin ',
-  'tequil',
-  'brandy',
-  'koniak',
-  'bourbon',
-];
-
-const _mixerKeywords = [
-  'tonic',
-  'tonik',
-  'kinley',
-  'citrus mix',
-  'limonka',
-  'cytryna',
-];
-
-/// Parses [source] and returns just the receipt; see [parseEParagonDetailed].
-Receipt parseEParagon(String source) => parseEParagonDetailed(source).receipt;
-
-/// Parses [source] (wrapper JSON, bare JPK payload, or bare JWS) into a
-/// [Receipt] plus warnings. Throws [EParagonParseException] on unusable input.
-EParagonResult parseEParagonDetailed(String source) {
-  final warnings = <String>[];
-  final payload = _extractPayload(source);
-
-  final dokument = payload['dokument'];
-  if (dokument is! Map) {
-    throw EParagonParseException('No "dokument" object in payload.');
-  }
-  final paragon = dokument['paragon'];
-  if (paragon is! Map) {
-    throw EParagonParseException('No "dokument.paragon" object in payload.');
-  }
-
-  final store = _storeName(dokument);
-  final date = _saleDate(paragon, dokument);
-
-  final items = <Item>[];
-  final pozycje = paragon['pozycja'];
-  if (pozycje is List) {
-    for (final p in pozycje) {
-      final towar = (p is Map) ? p['towar'] : null;
-      if (towar is! Map) continue;
-      final it = _itemFromTowar(towar.cast<String, dynamic>(), warnings);
-      if (it != null) items.add(it);
-    }
-  }
-  if (items.isEmpty) {
-    throw EParagonParseException('Receipt has no line items.');
-  }
-
-  // Bottle deposits ("opakowania zwrotne" / kaucja) are outside sumaBrutto but
-  // part of what was paid; add each as a regular splittable line.
-  final opak = paragon['opak'];
-  if (opak is Map) {
-    final dane = opak['daneOpak'];
-    if (dane is List) {
-      for (final d in dane) {
-        if (d is! Map) continue;
-        final cena = _asInt(d['cena']);
-        final iloscMil = _asInt(d['ilosc']); // thousandths
-        final qty = iloscMil / 1000;
-        final total = (cena * iloscMil / 1000).round();
-        if (total == 0) continue;
-        items.add(
-          Item(
-            id: Ids.next(),
-            name: 'Kaucja: '
-                '${(d['nazwa'] as String? ?? 'opakowanie').trim()} (deposit)',
-            totalGr: total,
-            qty: qty,
-            unitPriceGr: cena,
-            category: Categories.deposit,
-          ),
-        );
-      }
-    }
-  }
-
-  // Reconciliation figures.
-  var paid = _asIntOrNull((paragon['total'] as Map?)?['zaplZwrot']);
-  final sumaBrutto = _asIntOrNull((paragon['podsum'] as Map?)?['sumaBrutto']);
-  final opakWart = _asIntOrNull((paragon['opak'] as Map?)?['wart']) ?? 0;
-  paid ??= sumaBrutto == null ? null : sumaBrutto + opakWart;
-
-  if (sumaBrutto != null) {
-    final goods = items
-        .where((i) => i.category != Categories.deposit)
-        .fold(0, (s, i) => s + i.totalGr);
-    if (goods != sumaBrutto) {
-      warnings.add(
-        'Sum of parsed items (${formatPln(goods)}) differs from receipt '
-        'sumaBrutto (${formatPln(sumaBrutto)}).',
-      );
-    }
-  }
-
-  final title = [
-    if (store != null) store,
-    _iso(date),
-  ].join(' ');
-
-  return EParagonResult(
-    receipt: Receipt(
-      id: Ids.next(),
-      title: title,
-      store: store,
-      date: date,
-      items: items,
-      paidTotalGr: paid,
-    ),
-    warnings: warnings,
-  );
-}
-
-String? _storeName(Map<dynamic, dynamic> dokument) {
-  final podmiot = dokument['podmiot1'];
-  if (podmiot is! Map) return null;
-  final name = (podmiot['nazwaPod'] as String?)?.trim();
-  if (name == null || name.isEmpty) return null;
-  // Friendlier alias for the most common chain.
-  if (name.toUpperCase().contains('JERONIMO MARTINS')) return 'Biedronka';
-  return name;
-}

billsplit/lib/domain/models.dart

@@ -1,86 +0,0 @@
-/// Domain models. All money values are ints in grosze (1/100 PLN) to avoid
-/// floating point drift; formatting happens only at the UI/export edge.
-library;
-
-part 'assignment.dart';
-
-/// Formats [grosze] as a Polish złoty string, e.g. `1234` → `12,34 zł`.
-String formatPln(int grosze) {
-  final neg = grosze < 0;
-  final a = grosze.abs();
-  final zl = a ~/ 100;
-  final gr = (a % 100).toString().padLeft(2, '0');
-  return '${neg ? '-' : ''}$zl,$gr zł';
-}
-
-/// A person on the shared roster.
-class Person {
-  /// Creates a person; [drinks] controls alcohol-item defaults.
-  Person({required this.id, required this.name, this.drinks = true});
-
-  /// Restores a person from its [toJson] map.
-  factory Person.fromJson(Map<String, dynamic> j) => Person(
-        id: j['id'] as String,
-        name: j['name'] as String,
-        drinks: j['drinks'] as bool? ?? true,
-      );
-
-  /// Stable unique id.
-  final String id;
-
-  /// Display name.
-  String name;
-
-  /// Whether this person shares alcohol items by default.
-  bool drinks;
-
-  /// JSON representation for persistence.
-  Map<String, dynamic> toJson() => {'id': id, 'name': name, 'drinks': drinks};
-}
-
-/// A user-defined tag over roster members, e.g. "meat eaters".
-class Group {
-  /// Creates a group with optional initial [memberIds].
-  Group({required this.id, required this.name, Set<String>? memberIds})
-      : memberIds = memberIds ?? <String>{};
-
-  /// Restores a group from its [toJson] map.
-  factory Group.fromJson(Map<String, dynamic> j) => Group(
-        id: j['id'] as String,
-        name: j['name'] as String,
-        memberIds: (j['memberIds'] as List? ?? const <dynamic>[])
-            .cast<String>()
-            .toSet(),
-      );
-
-  /// Stable unique id.
-  final String id;
-
-  /// Display name.
-  String name;
-
-  /// Ids of [Person]s belonging to this group.
-  final Set<String> memberIds;
-
-  /// JSON representation for persistence.
-  Map<String, dynamic> toJson() =>
-      {'id': id, 'name': name, 'memberIds': memberIds.toList()};
-}
-
-/// How an item is assigned to people.
-enum AssignMode {
-  /// Everyone on the receipt shares the item.
-  everyone,
-
-  /// Only participants with [Person.drinks] set share the item.
-  drinkers,
-
-  /// Only participants without [Person.drinks] share the item.
-  nonDrinkers,
-
-  /// Members of one [Group] share the item.
-  group,
-
-  /// An explicit hand-picked set of people shares the item.
-  custom,
-}

billsplit/lib/domain/split_engine.dart

@@ -1,155 +0,0 @@
-/// Split computation. Grosz-exact: every item's shares sum to exactly the
-/// item total (largest-remainder distribution, deterministic order), so the
-/// per-person totals always reconcile with the receipt to the grosz.
-library;
-
-import 'package:billsplit/domain/models.dart';
-
-/// Accumulated amounts one person owes on a receipt.
-class PersonTotal {
-  /// Creates an empty total for [personId].
-  PersonTotal(this.personId);
-
-  /// The person this total belongs to.
-  final String personId;
-
-  /// Everything owed, in grosze.
-  int totalGr = 0;
-
-  /// The alcohol portion of [totalGr].
-  int alcoholGr = 0;
-
-  /// The non-alcohol portion of [totalGr].
-  int get restGr => totalGr - alcoholGr;
-}
-
-/// Result of [computeSplit].
-class SplitResult {
-  /// Bundles the computed maps.
-  SplitResult({
-    required this.perPerson,
-    required this.itemShares,
-    required this.unassigned,
-  });
-
-  /// personId → totals. Contains every receipt participant, even if 0.
-  final Map<String, PersonTotal> perPerson;
-
-  /// itemId → (personId → share in grosze). Only resolved participants.
-  final Map<String, Map<String, int>> itemShares;
-
-  /// Items that resolved to zero participants (excluded from totals).
-  final List<Item> unassigned;
-
-  /// Sum of all per-person totals, in grosze.
-  int get assignedTotalGr => perPerson.values.fold(0, (s, p) => s + p.totalGr);
-}
-
-/// People from [Receipt.participantIds] that still exist in [roster].
-List<Person> receiptParticipants(Receipt receipt, List<Person> roster) =>
-    roster.where((p) => receipt.participantIds.contains(p.id)).toList();
-
-/// Resolves an item's assignment to concrete people, always intersected with
-/// the receipt's participant pool.
-List<Person> resolveParticipants(
-  Item item,
-  Receipt receipt,
-  List<Person> roster,
-  List<Group> groups,
-) {
-  final pool = receiptParticipants(receipt, roster);
-  final a = item.assignment;
-  switch (a.mode) {
-    case AssignMode.everyone:
-      return pool;
-    case AssignMode.drinkers:
-      return pool.where((p) => p.drinks).toList();
-    case AssignMode.nonDrinkers:
-      return pool.where((p) => !p.drinks).toList();
-    case AssignMode.group:
-      final g = groups.where((g) => g.id == a.groupId).firstOrNull;
-      if (g == null) return const [];
-      return pool.where((p) => g.memberIds.contains(p.id)).toList();
-    case AssignMode.custom:
-      return pool.where((p) => a.customIds.contains(p.id)).toList();
-  }
-}
-
-/// Splits [totalGr] between [personIds]. Base share is floor(total/n); the
-/// remainder is handed out one grosz at a time starting at a position derived
-/// from [rotation] (e.g. a stable hash of the item id). Rotating the start
-/// per item avoids systematically overcharging the same person across a whole
-/// receipt, while staying fully deterministic. Shares always sum to exactly
-/// [totalGr] (also for negative totals, e.g. returns).
-Map<String, int> splitAmount(
-  int totalGr,
-  List<String> personIds, {
-  int rotation = 0,
-}) {
-  if (personIds.isEmpty) return const {};
-  final ids = [...personIds]..sort();
-  final n = ids.length;
-  final base = (totalGr / n).floor();
-  final remainder = totalGr - base * n; // 0 <= remainder < n, also if negative
-  final start = ((rotation % n) + n) % n;
-  final out = <String, int>{for (final id in ids) id: base};
-  for (var k = 0; k < remainder; k++) {
-    out[ids[(start + k) % n]] = base + 1;
-  }
-  return out;
-}
-
-/// Stable string hash (unlike `String.hashCode`, which is not guaranteed
-/// identical across Dart VM runs) so splits don't shift between app launches.
-int stableHash(String s) {
-  var h = 0;
-  for (final c in s.codeUnits) {
-    h = (h * 31 + c) & 0x7fffffff;
-  }
-  return h;
-}
-
-/// Computes the full split of [receipt] between [roster] members using
-/// [groups] for group-mode assignments.
-SplitResult computeSplit(
-  Receipt receipt,
-  List<Person> roster,
-  List<Group> groups,
-) {
-  final perPerson = <String, PersonTotal>{
-    for (final p in receiptParticipants(receipt, roster))
-      p.id: PersonTotal(p.id),
-  };
-  final itemShares = <String, Map<String, int>>{};
-  final unassigned = <Item>[];
-
-  for (final item in receipt.items) {
-    final people = resolveParticipants(item, receipt, roster, groups);
-    if (people.isEmpty) {
-      unassigned.add(item);
-      continue;
-    }
-    final shares = splitAmount(
-      item.totalGr,
-      people.map((p) => p.id).toList(),
-      rotation: stableHash(item.id),
-    );
-    itemShares[item.id] = shares;
-    final isAlcohol = item.category == Categories.alcohol;
-    shares.forEach((pid, amount) {
-      perPerson[pid]!
-        ..totalGr += amount
-        ..alcoholGr += isAlcohol ? amount : 0;
-    });
-  }
-
-  return SplitResult(
-    perPerson: perPerson,
-    itemShares: itemShares,
-    unassigned: unassigned,
-  );
-}
-
-extension<T> on Iterable<T> {
-  T? get firstOrNull => isEmpty ? null : first;
-}

billsplit/lib/domain/xlsx_export.dart

@@ -1,215 +0,0 @@
-/// Exports a receipt + computed split to an .xlsx workbook whose layout
-/// mirrors the hand-made "podzial_rachunku" sheet: one row per item, a 1/0
-/// person matrix, per-item cost-per-person, and a per-person summary.
-///
-/// Values are written as computed numbers (grosz-exact, matching the in-app
-/// engine), plus live SUM formulas for the column totals so the sheet stays
-/// consistent when opened in Excel/LibreOffice.
-library;
-
-import 'package:billsplit/domain/models.dart';
-import 'package:billsplit/domain/split_engine.dart';
-import 'package:excel/excel.dart';
-
-/// Renders [receipt] with its current split into xlsx bytes.
-List<int> exportXlsx({
-  required Receipt receipt,
-  required List<Person> roster,
-  required List<Group> groups,
-}) {
-  final excel = Excel.createExcel()..rename('Sheet1', 'Split');
-  final sheet = excel['Split'];
-
-  final people = receiptParticipants(receipt, roster)
-    ..sort((a, b) => a.name.toLowerCase().compareTo(b.name.toLowerCase()));
-  final split = computeSplit(receipt, roster, groups);
-
-  final bold = CellStyle(bold: true);
-  final boldGrey = CellStyle(
-    bold: true,
-    backgroundColorHex: ExcelColor.fromHexString('#D9D9D9'),
-  );
-  final alcoholStyle =
-      CellStyle(backgroundColorHex: ExcelColor.fromHexString('#FCE4D6'));
-  final warnStyle = CellStyle(
-    bold: true,
-    backgroundColorHex: ExcelColor.fromHexString('#FFC7CE'),
-  );
-
-  void put(int col, int row, CellValue value, [CellStyle? style]) {
-    final index = CellIndex.indexByColumnRow(columnIndex: col, rowIndex: row);
-    final cell = sheet.cell(index)..value = value;
-    if (style != null) cell.cellStyle = style;
-  }
-
-  double zl(int gr) => gr / 100.0;
-
-  var r = 0;
-  put(0, r, TextCellValue(receipt.title), bold);
-  r++;
-  put(
-    0,
-    r,
-    TextCellValue(
-      [
-        if (receipt.store != null) receipt.store!,
-        receipt.date.toIso8601String().substring(0, 10),
-        if (receipt.paidTotalGr != null)
-          'paid ${formatPln(receipt.paidTotalGr!)}',
-      ].join(' · '),
-    ),
-  );
-  r += 2;
-
-  // Header row.
-  const fixed = ['Lp', 'Item', 'Category', 'Qty', 'Unit', 'Discount', 'Total'];
-  for (var c = 0; c < fixed.length; c++) {
-    put(c, r, TextCellValue(fixed[c]), boldGrey);
-  }
-  const p0 = 7;
-  for (var i = 0; i < people.length; i++) {
-    put(p0 + i, r, TextCellValue(people[i].name), boldGrey);
-  }
-  put(p0 + people.length, r, TextCellValue('People on item'), boldGrey);
-  put(p0 + people.length + 1, r, TextCellValue('Cost / person'), boldGrey);
-  r++;
-
-  final firstDataRow = r;
-  var lp = 1;
-  for (final item in receipt.items) {
-    final shares = split.itemShares[item.id] ?? const <String, int>{};
-    final isAlcohol = item.category == Categories.alcohol;
-    final rowStyle = shares.isEmpty
-        ? warnStyle
-        : isAlcohol
-            ? alcoholStyle
-            : null;
-    put(0, r, IntCellValue(lp++), rowStyle);
-    put(1, r, TextCellValue(item.name), rowStyle);
-    put(2, r, TextCellValue(item.category), rowStyle);
-    put(3, r, DoubleCellValue(item.qty), rowStyle);
-    put(4, r, DoubleCellValue(zl(item.unitPriceGr)), rowStyle);
-    put(5, r, DoubleCellValue(zl(item.discountGr)), rowStyle);
-    put(6, r, DoubleCellValue(zl(item.totalGr)), rowStyle);
-    for (var i = 0; i < people.length; i++) {
-      put(
-        p0 + i,
-        r,
-        IntCellValue(shares.containsKey(people[i].id) ? 1 : 0),
-        rowStyle,
-      );
-    }
-    put(p0 + people.length, r, IntCellValue(shares.length), rowStyle);
-    if (shares.isNotEmpty) {
-      // Representative value; the exact grosz split may differ by ±0.01
-      // between people — the summary uses the exact per-person numbers.
-      put(
-        p0 + people.length + 1,
-        r,
-        DoubleCellValue(zl((item.totalGr / shares.length).round())),
-        rowStyle,
-      );
-    } else {
-      put(p0 + people.length + 1, r, TextCellValue('UNASSIGNED'), warnStyle);
-    }
-    r++;
-  }
-  final lastDataRow = r - 1;
-
-  // Totals row with a live formula over the Total column.
-  put(1, r, TextCellValue('TOTAL'), bold);
-  final totalCol = colName(6);
-  put(
-    6,
-    r,
-    FormulaCellValue(
-      'SUM($totalCol${firstDataRow + 1}:$totalCol${lastDataRow + 1})',
-    ),
-    bold,
-  );
-  r += 2;
-
-  // Per-person summary (exact grosz numbers from the engine).
-  put(1, r, TextCellValue('SUMMARY'), bold);
-  r++;
-  put(1, r, TextCellValue('Person'), boldGrey);
-  put(2, r, TextCellValue('Owes'), boldGrey);
-  put(3, r, TextCellValue('of which alcohol'), boldGrey);
-  put(4, r, TextCellValue('rest'), boldGrey);
-  r++;
-  final firstSummaryRow = r;
-  for (final p in people) {
-    final t = split.perPerson[p.id];
-    put(1, r, TextCellValue(p.name + (p.drinks ? '' : ' (non-drinker)')));
-    put(2, r, DoubleCellValue(zl(t?.totalGr ?? 0)));
-    put(3, r, DoubleCellValue(zl(t?.alcoholGr ?? 0)));
-    put(4, r, DoubleCellValue(zl(t?.restGr ?? 0)));
-    r++;
-  }
-  put(1, r, TextCellValue('SUM'), bold);
-  for (var c = 2; c <= 4; c++) {
-    final col = colName(c);
-    put(c, r, FormulaCellValue('SUM($col$firstSummaryRow:$col$r)'), bold);
-  }
-  r += 2;
-
-  // Reconciliation note.
-  final assigned = split.assignedTotalGr;
-  final itemsTotal = receipt.itemsTotalGr;
-  put(
-    1,
-    r,
-    TextCellValue(
-      _checkLine(receipt, assigned, itemsTotal, split),
-    ),
-    split.unassigned.isEmpty && assigned == itemsTotal ? bold : warnStyle,
-  );
-  r += 2;
-  put(
-    0,
-    r,
-    TextCellValue(
-      '1 = person shares the item. Matrix and summary are exported values '
-      'from the app (grosz-exact); edit splits in the app, not here.',
-    ),
-  );
-
-  // Column widths.
-  sheet
-    ..setColumnWidth(0, 5)
-    ..setColumnWidth(1, 34)
-    ..setColumnWidth(2, 11);
-  for (var c = 3; c < 7; c++) {
-    sheet.setColumnWidth(c, 10);
-  }
-  for (var i = 0; i < people.length + 2; i++) {
-    sheet.setColumnWidth(p0 + i, 12);
-  }
-
-  return excel.encode()!;
-}
-
-String _checkLine(
-  Receipt receipt,
-  int assigned,
-  int itemsTotal,
-  SplitResult split,
-) {
-  final paid = receipt.paidTotalGr;
-  final paidPart = paid == null ? '' : ' / paid ${formatPln(paid)}';
-  final un = split.unassigned.length;
-  final unPart = un == 0 ? '' : ' — $un UNASSIGNED item(s) excluded';
-  return 'Check: assigned ${formatPln(assigned)} '
-      '/ items ${formatPln(itemsTotal)}$paidPart$unPart';
-}
-
-/// Converts a 0-based column index into its A1-style name (0 → A, 26 → AA).
-String colName(int index) {
-  var i = index;
-  var s = '';
-  while (i >= 0) {
-    s = String.fromCharCode(65 + (i % 26)) + s;
-    i = i ~/ 26 - 1;
-  }
-  return s;
-}

billsplit/lib/main.dart

@@ -1,39 +0,0 @@
-import 'dart:async';
-
-import 'package:billsplit/state/app_state.dart';
-import 'package:billsplit/ui/home_screen.dart';
-import 'package:design_system/design_system.dart';
-import 'package:flutter/material.dart';
-import 'package:provider/provider.dart';
-
-void main() {
-  WidgetsFlutterBinding.ensureInitialized();
-  final state = AppState();
-  unawaited(state.load());
-  runApp(BillSplitApp(state: state));
-}
-
-/// Root widget wiring [AppState] into the tree.
-class BillSplitApp extends StatelessWidget {
-  /// Creates the app around an existing [state].
-  const BillSplitApp({required this.state, super.key});
-
-  /// The single app-wide state instance.
-  final AppState state;
-
-  @override
-  Widget build(BuildContext context) {
-    return ChangeNotifierProvider.value(
-      value: state,
-      child: MaterialApp(
-        title: 'BillSplit',
-        debugShowCheckedModeBanner: false,
-        // The shared light theme, replacing a teal-seeded scheme. Light, not
-        // dark: the receipt screens carry black-on-white helper text, so
-        // switching brightness here would make it unreadable.
-        theme: buildLightTheme(),
-        home: const HomeScreen(),
-      ),
-    );
-  }
-}

billsplit/lib/state/app_state.dart

@@ -1,166 +0,0 @@
-import 'dart:async';
-import 'dart:convert';
-import 'dart:io';
-
-import 'package:billsplit/domain/models.dart';
-import 'package:flutter/foundation.dart';
-import 'package:path_provider/path_provider.dart';
-
-/// Single source of truth: roster, groups, receipts. Persisted as one JSON
-/// file in the app documents directory; saves are debounced.
-class AppState extends ChangeNotifier {
-  /// Creates the state; [overrideDir] replaces the platform documents
-  /// directory (used by tests).
-  AppState({Directory? overrideDir}) : _overrideDir = overrideDir;
-
-  final Directory? _overrideDir;
-
-  /// The shared roster of people.
-  final List<Person> people = [];
-
-  /// User-defined groups over [people].
-  final List<Group> groups = [];
-
-  /// Saved receipts, newest first.
-  final List<Receipt> receipts = [];
-
-  /// Whether [load] has completed.
-  bool loaded = false;
-
-  Timer? _saveTimer;
-
-  Future<File> _file() async {
-    final dir = _overrideDir ?? await getApplicationDocumentsDirectory();
-    final d = Directory('${dir.path}/billsplit');
-    if (!d.existsSync()) d.createSync(recursive: true);
-    return File('${d.path}/state.json');
-  }
-
-  /// Loads persisted state; failures leave the state empty but usable.
-  Future<void> load() async {
-    try {
-      final f = await _file();
-      if (f.existsSync()) {
-        final j = jsonDecode(f.readAsStringSync()) as Map<String, dynamic>;
-        people
-          ..clear()
-          ..addAll(
-            (j['people'] as List? ?? const <dynamic>[])
-                .map((e) => Person.fromJson((e as Map).cast())),
-          );
-        groups
-          ..clear()
-          ..addAll(
-            (j['groups'] as List? ?? const <dynamic>[])
-                .map((e) => Group.fromJson((e as Map).cast())),
-          );
-        receipts
-          ..clear()
-          ..addAll(
-            (j['receipts'] as List? ?? const <dynamic>[])
-                .map((e) => Receipt.fromJson((e as Map).cast())),
-          );
-        _prune();
-      }
-    } on FormatException catch (e) {
-      debugPrint('State load failed (corrupt JSON): $e');
-    } on FileSystemException catch (e) {
-      debugPrint('State load failed (IO): $e');
-    }
-    loaded = true;
-    notifyListeners();
-  }
-
-  /// Drop references to people that no longer exist.
-  void _prune() {
-    final ids = people.map((p) => p.id).toSet();
-    for (final g in groups) {
-      g.memberIds.removeWhere((id) => !ids.contains(id));
-    }
-    for (final r in receipts) {
-      r.participantIds.removeWhere((id) => !ids.contains(id));
-      for (final i in r.items) {
-        i.assignment.customIds.removeWhere((id) => !ids.contains(id));
-      }
-    }
-  }
-
-  void _scheduleSave() {
-    _saveTimer?.cancel();
-    _saveTimer = Timer(const Duration(milliseconds: 400), save);
-  }
-
-  /// Writes the current state to disk immediately.
-  Future<void> save() async {
-    try {
-      final f = await _file();
-      f.writeAsStringSync(
-        jsonEncode({
-          'people': people.map((p) => p.toJson()).toList(),
-          'groups': groups.map((g) => g.toJson()).toList(),
-          'receipts': receipts.map((r) => r.toJson()).toList(),
-        }),
-      );
-    } on FileSystemException catch (e) {
-      debugPrint('State save failed: $e');
-    }
-  }
-
-  /// Runs [fn], prunes dangling references, notifies, schedules a save.
-  void mutate(void Function() fn) {
-    fn();
-    _prune();
-    notifyListeners();
-    _scheduleSave();
-  }
-
-  // Convenience CRUD -------------------------------------------------------
-
-  /// Adds a person to the roster and returns it.
-  Person addPerson(String name, {bool drinks = true}) {
-    final p = Person(id: Ids.next(), name: name, drinks: drinks);
-    mutate(() => people.add(p));
-    return p;
-  }
-
-  /// Removes [p] everywhere (roster, groups, receipts, assignments).
-  void removePerson(Person p) => mutate(() => people.remove(p));
-
-  /// Adds an empty group and returns it.
-  Group addGroup(String name) {
-    final g = Group(id: Ids.next(), name: name);
-    mutate(() => groups.add(g));
-    return g;
-  }
-
-  /// Removes [g]; items assigned to it fall back to everyone.
-  void removeGroup(Group g) => mutate(() {
-        groups.remove(g);
-        for (final r in receipts) {
-          for (final i in r.items) {
-            if (i.assignment.groupId == g.id) {
-              i.assignment
-                ..mode = AssignMode.everyone
-                ..groupId = null;
-            }
-          }
-        }
-      });
-
-  /// Inserts [r] at the top; empty participants default to the whole roster.
-  void addReceipt(Receipt r) => mutate(() {
-        if (r.participantIds.isEmpty) {
-          r.participantIds.addAll(people.map((p) => p.id));
-        }
-        receipts.insert(0, r);
-      });
-
-  /// Deletes [r].
-  void removeReceipt(Receipt r) => mutate(() => receipts.remove(r));
-
-  @override
-  void dispose() {
-    _saveTimer?.cancel();
-    super.dispose();
-  }
-}

billsplit/lib/ui/assignment_sheet.dart

@@ -1,146 +0,0 @@
-import 'package:billsplit/domain/models.dart';
-import 'package:billsplit/domain/split_engine.dart';
-import 'package:billsplit/state/app_state.dart';
-import 'package:design_system/design_system.dart';
-import 'package:flutter/material.dart';
-
-/// Bottom sheet to assign an item: quick modes (everyone / drinkers /
-/// non-drinkers / group) or explicit person selection. Toggling a person
-/// checkbox on a non-custom mode first materializes the current selection,
-/// then switches to custom.
-Future<void> showAssignmentSheet(
-  BuildContext context,
-  AppState state,
-  Receipt receipt,
-  Item item,
-) {
-  return showModalBottomSheet<void>(
-    context: context,
-    isScrollControlled: true,
-    builder: (c) => StatefulBuilder(
-      builder: (c, setSheet) {
-        final pool = receiptParticipants(receipt, state.people)
-          ..sort(
-            (a, b) => a.name.toLowerCase().compareTo(b.name.toLowerCase()),
-          );
-        final resolved =
-            resolveParticipants(item, receipt, state.people, state.groups)
-                .map((p) => p.id)
-                .toSet();
-
-        void setMode(AssignMode mode, {String? groupId}) {
-          state.mutate(() {
-            item.assignment
-              ..mode = mode
-              ..groupId = groupId;
-          });
-          setSheet(() {});
-        }
-
-        void togglePerson(Person p, {required bool selected}) {
-          state.mutate(() {
-            if (item.assignment.mode != AssignMode.custom) {
-              item.assignment
-                ..customIds.clear()
-                ..customIds.addAll(resolved)
-                ..mode = AssignMode.custom
-                ..groupId = null;
-            }
-            if (selected) {
-              item.assignment.customIds.add(p.id);
-            } else {
-              item.assignment.customIds.remove(p.id);
-            }
-          });
-          setSheet(() {});
-        }
-
-        final selectedSeg = switch (item.assignment.mode) {
-          AssignMode.everyone => 'everyone',
-          AssignMode.drinkers => 'drinkers',
-          AssignMode.nonDrinkers => 'nonDrinkers',
-          AssignMode.group => 'group:${item.assignment.groupId}',
-          AssignMode.custom => 'custom',
-        };
-
-        return SafeArea(
-          child: Padding(
-            padding: const EdgeInsets.all(16),
-            child: Column(
-              mainAxisSize: MainAxisSize.min,
-              crossAxisAlignment: CrossAxisAlignment.start,
-              children: [
-                Text(item.name, style: Theme.of(c).textTheme.titleMedium),
-                Text(
-                  '${formatPln(item.totalGr)} · ${item.category}',
-                  style: Theme.of(c).textTheme.bodySmall,
-                ),
-                const SizedBox(height: 12),
-                Wrap(
-                  spacing: 8,
-                  runSpacing: 8,
-                  children: [
-                    ChoiceChip(
-                      label: const Text('Everyone'),
-                      selected: selectedSeg == 'everyone',
-                      onSelected: (_) => setMode(AssignMode.everyone),
-                    ),
-                    ChoiceChip(
-                      label: const Text('Drinkers'),
-                      selected: selectedSeg == 'drinkers',
-                      onSelected: (_) => setMode(AssignMode.drinkers),
-                    ),
-                    ChoiceChip(
-                      label: const Text('Non-drinkers'),
-                      selected: selectedSeg == 'nonDrinkers',
-                      onSelected: (_) => setMode(AssignMode.nonDrinkers),
-                    ),
-                    for (final g in state.groups)
-                      ChoiceChip(
-                        label: Text(g.name),
-                        selected: selectedSeg == 'group:${g.id}',
-                        onSelected: (_) =>
-                            setMode(AssignMode.group, groupId: g.id),
-                      ),
-                  ],
-                ),
-                const SizedBox(height: 8),
-                Flexible(
-                  child: ListView(
-                    shrinkWrap: true,
-                    children: [
-                      for (final p in pool)
-                        CheckboxListTile(
-                          dense: true,
-                          title: Text(p.name),
-                          subtitle: p.drinks ? null : const Text('non-drinker'),
-                          value: resolved.contains(p.id),
-                          onChanged: (v) =>
-                              togglePerson(p, selected: v ?? false),
-                        ),
-                    ],
-                  ),
-                ),
-                Text(
-                  resolved.isEmpty
-                      ? 'Nobody selected — this item will be excluded from '
-                          'totals until someone is assigned.'
-                      : _eachLabel(resolved.length, item.totalGr),
-                  style: TextStyle(
-                    color: resolved.isEmpty
-                        ? Theme.of(c).colorScheme.error
-                        : Theme.of(c).colorScheme.onSurfaceVariant,
-                    fontSize: AppTextSize.caption,
-                  ),
-                ),
-              ],
-            ),
-          ),
-        );
-      },
-    ),
-  );
-}
-
-String _eachLabel(int n, int totalGr) =>
-    '$n people · ~${formatPln((totalGr / n).round())} each';

billsplit/lib/ui/home_screen.dart

@@ -1,210 +0,0 @@
-import 'dart:convert';
-
-import 'package:billsplit/domain/eparagon_parser.dart';
-import 'package:billsplit/domain/models.dart';
-import 'package:billsplit/state/app_state.dart';
-import 'package:billsplit/ui/people_screen.dart';
-import 'package:billsplit/ui/receipt_screen.dart';
-import 'package:design_system/design_system.dart';
-import 'package:file_selector/file_selector.dart';
-import 'package:flutter/material.dart';
-import 'package:provider/provider.dart';
-
-/// Receipt list plus entry points for import / manual creation.
-class HomeScreen extends StatelessWidget {
-  /// Creates the home screen.
-  const HomeScreen({super.key});
-
-  @override
-  Widget build(BuildContext context) {
-    final state = context.watch<AppState>();
-    return Scaffold(
-      appBar: AppBar(
-        title: const Text('BillSplit'),
-        actions: [
-          IconButton(
-            tooltip: 'People & groups',
-            icon: const Icon(Icons.group),
-            onPressed: () => Navigator.push(
-              context,
-              MaterialPageRoute<void>(builder: (_) => const PeopleScreen()),
-            ),
-          ),
-        ],
-      ),
-      body: !state.loaded
-          ? const Center(child: CircularProgressIndicator())
-          : state.receipts.isEmpty
-              ? const _EmptyHint()
-              : ListView.builder(
-                  itemCount: state.receipts.length,
-                  itemBuilder: (context, i) {
-                    final r = state.receipts[i];
-                    return Dismissible(
-                      key: ValueKey(r.id),
-                      direction: DismissDirection.endToStart,
-                      // The delete affordance revealed by swiping. The fill
-                      // and the icon on top of it must move together, hence
-                      // error/onError rather than two independent colours.
-                      background: Container(
-                        color: Theme.of(context).colorScheme.error,
-                        alignment: Alignment.centerRight,
-                        padding: const EdgeInsets.only(right: AppSpacing.md),
-                        child: Icon(
-                          Icons.delete,
-                          color: Theme.of(context).colorScheme.onError,
-                        ),
-                      ),
-                      confirmDismiss: (_) => _confirmDelete(context, r),
-                      onDismissed: (_) => state.removeReceipt(r),
-                      child: ListTile(
-                        title: Text(r.title),
-                        subtitle: Text(
-                          '${r.items.length} items · '
-                          '${r.participantIds.length} people',
-                        ),
-                        trailing: Text(
-                          formatPln(r.itemsTotalGr),
-                          style: Theme.of(context).textTheme.titleMedium,
-                        ),
-                        onTap: () => Navigator.push(
-                          context,
-                          MaterialPageRoute<void>(
-                            builder: (_) => ReceiptScreen(receiptId: r.id),
-                          ),
-                        ),
-                      ),
-                    );
-                  },
-                ),
-      floatingActionButton: Column(
-        mainAxisSize: MainAxisSize.min,
-        crossAxisAlignment: CrossAxisAlignment.end,
-        children: [
-          FloatingActionButton.extended(
-            heroTag: 'import',
-            icon: const Icon(Icons.file_download),
-            label: const Text('Import e-paragon'),
-            onPressed: () => _import(context),
-          ),
-          const SizedBox(height: 12),
-          FloatingActionButton.extended(
-            heroTag: 'new',
-            icon: const Icon(Icons.add),
-            label: const Text('New receipt'),
-            onPressed: () => _createManual(context),
-          ),
-        ],
-      ),
-    );
-  }
-
-  Future<bool> _confirmDelete(BuildContext context, Receipt r) async {
-    return await showDialog<bool>(
-          context: context,
-          builder: (c) => AlertDialog(
-            title: const Text('Delete receipt?'),
-            content: Text('"${r.title}" will be removed permanently.'),
-            actions: [
-              TextButton(
-                onPressed: () => Navigator.pop(c, false),
-                child: const Text('Cancel'),
-              ),
-              FilledButton(
-                onPressed: () => Navigator.pop(c, true),
-                child: const Text('Delete'),
-              ),
-            ],
-          ),
-        ) ??
-        false;
-  }
-
-  Future<void> _import(BuildContext context) async {
-    final state = context.read<AppState>();
-    final messenger = ScaffoldMessenger.of(context);
-    final nav = Navigator.of(context);
-    const jsonGroup = XTypeGroup(
-      label: 'e-paragon',
-      extensions: ['json'],
-      // Android matches on MIME rather than extension; without this the
-      // picker greys out every file.
-      mimeTypes: ['application/json'],
-      uniformTypeIdentifiers: ['public.json'],
-    );
-    final picked = await openFile(acceptedTypeGroups: [jsonGroup]);
-    if (picked == null) return;
-    final data = await picked.readAsBytes();
-    try {
-      final result = parseEParagonDetailed(utf8.decode(data));
-      state.addReceipt(result.receipt);
-      for (final w in result.warnings) {
-        messenger.showSnackBar(SnackBar(content: Text(w)));
-      }
-      nav.push(
-        MaterialPageRoute<void>(
-          builder: (_) => ReceiptScreen(receiptId: result.receipt.id),
-        ),
-      );
-    } on EParagonParseException catch (e) {
-      messenger.showSnackBar(SnackBar(content: Text(e.message)));
-    } on Exception catch (e) {
-      messenger.showSnackBar(SnackBar(content: Text('Import failed: $e')));
-    }
-  }
-
-  Future<void> _createManual(BuildContext context) async {
-    final state = context.read<AppState>();
-    final nav = Navigator.of(context);
-    final controller = TextEditingController();
-    final title = await showDialog<String>(
-      context: context,
-      builder: (c) => AlertDialog(
-        title: const Text('New receipt'),
-        content: TextField(
-          controller: controller,
-          autofocus: true,
-          decoration: const InputDecoration(labelText: 'Title'),
-          onSubmitted: (v) => Navigator.pop(c, v),
-        ),
-        actions: [
-          TextButton(
-            onPressed: () => Navigator.pop(c),
-            child: const Text('Cancel'),
-          ),
-          FilledButton(
-            onPressed: () => Navigator.pop(c, controller.text),
-            child: const Text('Create'),
-          ),
-        ],
-      ),
-    );
-    if (title == null || title.trim().isEmpty) return;
-    final r = Receipt(id: Ids.next(), title: title.trim());
-    state.addReceipt(r);
-    nav.push(
-      MaterialPageRoute<void>(
-        builder: (_) => ReceiptScreen(receiptId: r.id),
-      ),
-    );
-  }
-}
-
-class _EmptyHint extends StatelessWidget {
-  const _EmptyHint();
-
-  @override
-  Widget build(BuildContext context) {
-    return Center(
-      child: Padding(
-        padding: const EdgeInsets.all(32),
-        child: Text(
-          'No receipts yet.\n\nAdd people first (top right), then import a '
-          'Biedronka e-paragon JSON or create a receipt manually.',
-          textAlign: TextAlign.center,
-          style: Theme.of(context).textTheme.bodyLarge,
-        ),
-      ),
-    );
-  }
-}

billsplit/lib/ui/item_edit.dart

@@ -1,137 +0,0 @@
-import 'package:billsplit/domain/models.dart';
-import 'package:billsplit/state/app_state.dart';
-import 'package:design_system/design_system.dart';
-import 'package:flutter/material.dart';
-
-/// Add ([item] == null) or edit an item. The user types amounts in złoty
-/// ("12,34" or "12.34"); they are stored as int grosze.
-Future<void> showItemEditDialog(
-  BuildContext context,
-  AppState state,
-  Receipt receipt,
-  Item? item,
-) async {
-  final name = TextEditingController(text: item?.name ?? '');
-  final total = TextEditingController(
-    text: item == null ? '' : _zl(item.totalGr),
-  );
-  final qty = TextEditingController(text: (item?.qty ?? 1).toString());
-  var category = item?.category ?? Categories.general;
-  final categories = <String>{
-    Categories.general,
-    Categories.alcohol,
-    Categories.mixer,
-    Categories.deposit,
-    ...receipt.items.map((i) => i.category),
-  }.toList();
-
-  await showDialog<void>(
-    context: context,
-    builder: (c) => StatefulBuilder(
-      builder: (c, setState) => AlertDialog(
-        title: Text(item == null ? 'Add item' : 'Edit item'),
-        content: SingleChildScrollView(
-          child: Column(
-            mainAxisSize: MainAxisSize.min,
-            children: [
-              TextField(
-                controller: name,
-                autofocus: item == null,
-                decoration: const InputDecoration(labelText: 'Name'),
-              ),
-              TextField(
-                controller: total,
-                keyboardType:
-                    const TextInputType.numberWithOptions(decimal: true),
-                decoration: const InputDecoration(
-                  labelText: 'Total (zł)',
-                  hintText: 'e.g. 12,34',
-                ),
-              ),
-              TextField(
-                controller: qty,
-                keyboardType:
-                    const TextInputType.numberWithOptions(decimal: true),
-                decoration: const InputDecoration(labelText: 'Quantity'),
-              ),
-              const SizedBox(height: 8),
-              DropdownButtonFormField<String>(
-                initialValue: category,
-                decoration: const InputDecoration(labelText: 'Category'),
-                items: [
-                  for (final cat in categories)
-                    DropdownMenuItem(value: cat, child: Text(cat)),
-                ],
-                onChanged: (v) =>
-                    setState(() => category = v ?? Categories.general),
-              ),
-              const SizedBox(height: 4),
-              Text(
-                'Alcohol items default to drinkers only; everything else to '
-                'everyone. Fine-tune by tapping the item afterwards.',
-                style: TextStyle(
-                  fontSize: AppTextSize.caption,
-                  color: Theme.of(c).colorScheme.onSurfaceVariant,
-                ),
-              ),
-            ],
-          ),
-        ),
-        actions: [
-          if (item != null)
-            TextButton(
-              onPressed: () {
-                state.mutate(() => receipt.items.remove(item));
-                Navigator.pop(c);
-              },
-              child: Text(
-                'Delete',
-                style: TextStyle(color: Theme.of(c).colorScheme.error),
-              ),
-            ),
-          TextButton(
-            onPressed: () => Navigator.pop(c),
-            child: const Text('Cancel'),
-          ),
-          FilledButton(
-            onPressed: () {
-              final gr = _parseZl(total.text);
-              if (name.text.trim().isEmpty || gr == null) return;
-              state.mutate(() {
-                if (item == null) {
-                  final it = Item(
-                    id: Ids.next(),
-                    name: name.text.trim(),
-                    totalGr: gr,
-                    qty: double.tryParse(qty.text.replaceAll(',', '.')) ?? 1,
-                    category: category,
-                    assignment: category == Categories.alcohol
-                        ? Assignment(mode: AssignMode.drinkers)
-                        : Assignment(),
-                  );
-                  receipt.items.add(it);
-                } else {
-                  item
-                    ..name = name.text.trim()
-                    ..totalGr = gr
-                    ..qty = double.tryParse(qty.text.replaceAll(',', '.')) ?? 1
-                    ..category = category;
-                }
-              });
-              Navigator.pop(c);
-            },
-            child: const Text('Save'),
-          ),
-        ],
-      ),
-    ),
-  );
-}
-
-String _zl(int gr) => (gr / 100).toStringAsFixed(2);
-
-int? _parseZl(String s) {
-  final v = double.tryParse(s.replaceAll(',', '.').replaceAll(' ', ''));
-  if (v == null) return null;
-  return (v * 100).round();
-}

billsplit/lib/ui/people_screen.dart

@@ -1,135 +0,0 @@
-import 'package:billsplit/domain/models.dart';
-import 'package:billsplit/state/app_state.dart';
-import 'package:design_system/design_system.dart';
-import 'package:flutter/material.dart';
-import 'package:provider/provider.dart';
-
-part 'people_tiles.dart';
-
-/// Roster management: people with a drinks toggle, plus custom groups.
-class PeopleScreen extends StatelessWidget {
-  /// Creates the people screen.
-  const PeopleScreen({super.key});
-
-  @override
-  Widget build(BuildContext context) {
-    final state = context.watch<AppState>();
-    return Scaffold(
-      appBar: AppBar(title: const Text('People & groups')),
-      body: ListView(
-        padding: const EdgeInsets.only(bottom: 96),
-        children: [
-          const SectionHeader('People', padding: SectionHeader.defaultPadding),
-          if (state.people.isEmpty)
-            const Padding(
-              padding: EdgeInsets.all(16),
-              child: Text('Nobody yet — add people below.'),
-            ),
-          for (final p in state.people) _PersonTile(person: p),
-          const Divider(height: 32),
-          const SectionHeader('Groups', padding: SectionHeader.defaultPadding),
-          Padding(
-            padding: const EdgeInsets.symmetric(horizontal: 16),
-            child: Text(
-              'Drinkers / non-drinkers are built in (the toggle on each '
-              'person). Groups below are extra tags, e.g. "meat eaters".',
-              style: TextStyle(
-                fontSize: AppTextSize.caption,
-                color: Theme.of(context).colorScheme.onSurfaceVariant,
-              ),
-            ),
-          ),
-          for (final g in state.groups) _GroupTile(group: g),
-          Padding(
-            padding: const EdgeInsets.all(16),
-            child: OutlinedButton.icon(
-              icon: const Icon(Icons.add),
-              label: const Text('Add group'),
-              onPressed: () => _addGroup(context),
-            ),
-          ),
-        ],
-      ),
-      floatingActionButton: FloatingActionButton.extended(
-        icon: const Icon(Icons.person_add),
-        label: const Text('Add person'),
-        onPressed: () => _addPerson(context),
-      ),
-    );
-  }
-
-  Future<void> _addPerson(BuildContext context) async {
-    final state = context.read<AppState>();
-    final controller = TextEditingController();
-    var drinks = true;
-    await showDialog<void>(
-      context: context,
-      builder: (c) => StatefulBuilder(
-        builder: (c, setState) => AlertDialog(
-          title: const Text('Add person'),
-          content: Column(
-            mainAxisSize: MainAxisSize.min,
-            children: [
-              TextField(
-                controller: controller,
-                autofocus: true,
-                decoration: const InputDecoration(labelText: 'Name'),
-              ),
-              SwitchListTile(
-                title: const Text('Drinks alcohol'),
-                value: drinks,
-                onChanged: (v) => setState(() => drinks = v),
-              ),
-            ],
-          ),
-          actions: [
-            TextButton(
-              onPressed: () => Navigator.pop(c),
-              child: const Text('Cancel'),
-            ),
-            FilledButton(
-              onPressed: () {
-                if (controller.text.trim().isNotEmpty) {
-                  state.addPerson(controller.text.trim(), drinks: drinks);
-                }
-                Navigator.pop(c);
-              },
-              child: const Text('Add'),
-            ),
-          ],
-        ),
-      ),
-    );
-  }
-
-  Future<void> _addGroup(BuildContext context) async {
-    final state = context.read<AppState>();
-    final controller = TextEditingController();
-    await showDialog<void>(
-      context: context,
-      builder: (c) => AlertDialog(
-        title: const Text('Add group'),
-        content: TextField(
-          controller: controller,
-          autofocus: true,
-          decoration: const InputDecoration(labelText: 'Group name'),
-        ),
-        actions: [
-          TextButton(
-            onPressed: () => Navigator.pop(c),
-            child: const Text('Cancel'),
-          ),
-          FilledButton(
-            onPressed: () {
-              if (controller.text.trim().isNotEmpty) {
-                state.addGroup(controller.text.trim());
-              }
-              Navigator.pop(c);
-            },
-            child: const Text('Add'),
-          ),
-        ],
-      ),
-    );
-  }
-}

billsplit/lib/ui/people_tiles.dart

@@ -1,139 +0,0 @@
-/// Person and group tile widgets.
-///
-/// Split out of people_screen.dart to keep it under the 250-line cap. A `part`
-/// because Dart privates are library-scoped.
-
-part of 'people_screen.dart';
-
-class _PersonTile extends StatelessWidget {
-  const _PersonTile({required this.person});
-  final Person person;
-
-  @override
-  Widget build(BuildContext context) {
-    final state = context.read<AppState>();
-    return ListTile(
-      leading: CircleAvatar(
-        child: Text(
-          person.name.isEmpty ? '?' : person.name.substring(0, 1).toUpperCase(),
-        ),
-      ),
-      title: Text(person.name),
-      subtitle: Wrap(
-        spacing: 6,
-        children: [
-          for (final g in state.groups.where(
-            (g) => g.memberIds.contains(person.id),
-          ))
-            Chip(
-              label: Text(g.name, style: const TextStyle(fontSize: 11)),
-              visualDensity: VisualDensity.compact,
-              materialTapTargetSize: MaterialTapTargetSize.shrinkWrap,
-            ),
-        ],
-      ),
-      trailing: Row(
-        mainAxisSize: MainAxisSize.min,
-        children: [
-          Tooltip(
-            message: 'Drinks alcohol',
-            child: Switch(
-              value: person.drinks,
-              onChanged: (v) => state.mutate(() => person.drinks = v),
-            ),
-          ),
-          IconButton(
-            icon: const Icon(Icons.delete_outline),
-            onPressed: () => _confirmRemove(context, state),
-          ),
-        ],
-      ),
-      onTap: () => _editMembership(context, state),
-    );
-  }
-
-  Future<void> _confirmRemove(BuildContext context, AppState state) async {
-    final ok = await showDialog<bool>(
-      context: context,
-      builder: (c) => AlertDialog(
-        title: Text('Remove ${person.name}?'),
-        content: const Text(
-          'They will be removed from all receipts and item assignments.',
-        ),
-        actions: [
-          TextButton(
-            onPressed: () => Navigator.pop(c, false),
-            child: const Text('Cancel'),
-          ),
-          FilledButton(
-            onPressed: () => Navigator.pop(c, true),
-            child: const Text('Remove'),
-          ),
-        ],
-      ),
-    );
-    if (ok == true) state.removePerson(person);
-  }
-
-  Future<void> _editMembership(BuildContext context, AppState state) async {
-    if (state.groups.isEmpty) return;
-    await showModalBottomSheet<void>(
-      context: context,
-      builder: (c) => StatefulBuilder(
-        builder: (c, setState) => SafeArea(
-          child: ListView(
-            shrinkWrap: true,
-            children: [
-              Padding(
-                padding: const EdgeInsets.all(16),
-                child: Text(
-                  '${person.name} — groups',
-                  style: Theme.of(c).textTheme.titleMedium,
-                ),
-              ),
-              for (final g in state.groups)
-                CheckboxListTile(
-                  title: Text(g.name),
-                  value: g.memberIds.contains(person.id),
-                  onChanged: (v) {
-                    state.mutate(() {
-                      if (v == true) {
-                        g.memberIds.add(person.id);
-                      } else {
-                        g.memberIds.remove(person.id);
-                      }
-                    });
-                    setState(() {});
-                  },
-                ),
-            ],
-          ),
-        ),
-      ),
-    );
-  }
-}
-
-class _GroupTile extends StatelessWidget {
-  const _GroupTile({required this.group});
-  final Group group;
-
-  @override
-  Widget build(BuildContext context) {
-    final state = context.read<AppState>();
-    final names = state.people
-        .where((p) => group.memberIds.contains(p.id))
-        .map((p) => p.name)
-        .join(', ');
-    return ListTile(
-      leading: const Icon(Icons.label_outline),
-      title: Text(group.name),
-      subtitle:
-          Text(names.isEmpty ? 'No members — tap a person to add' : names),
-      trailing: IconButton(
-        icon: const Icon(Icons.delete_outline),
-        onPressed: () => state.removeGroup(group),
-      ),
-    );
-  }
-}

billsplit/lib/ui/receipt_items.dart

@@ -1,198 +0,0 @@
-/// The receipt item list and its row widgets.
-///
-/// Split out of receipt_screen.dart to keep it under the 250-line cap. A `part`
-/// because Dart privates are library-scoped.
-
-part of 'receipt_screen.dart';
-
-class _ItemsList extends StatelessWidget {
-  const _ItemsList({required this.receipt, required this.split});
-  final Receipt receipt;
-  final SplitResult split;
-
-  @override
-  Widget build(BuildContext context) {
-    final state = context.read<AppState>();
-    if (receipt.items.isEmpty) {
-      return const Center(child: Text('No items — add with +.'));
-    }
-    return ListView.builder(
-      padding: const EdgeInsets.only(bottom: 96),
-      itemCount: receipt.items.length,
-      itemBuilder: (context, i) {
-        final item = receipt.items[i];
-        final people =
-            resolveParticipants(item, receipt, state.people, state.groups);
-        final unassigned = people.isEmpty;
-        return ListTile(
-          dense: true,
-          leading: _CategoryDot(category: item.category),
-          title: Text(item.name),
-          subtitle: Text(
-            _assignmentLabel(item, people.length, state),
-            style: TextStyle(
-              color: unassigned ? Theme.of(context).colorScheme.error : null,
-              fontWeight: unassigned ? FontWeight.bold : null,
-            ),
-          ),
-          trailing: Text(formatPln(item.totalGr)),
-          onTap: () => showAssignmentSheet(context, state, receipt, item),
-          onLongPress: () => showItemEditDialog(context, state, receipt, item),
-        );
-      },
-    );
-  }
-
-  String _assignmentLabel(Item item, int n, AppState state) {
-    switch (item.assignment.mode) {
-      case AssignMode.everyone:
-        return 'Everyone ($n)';
-      case AssignMode.drinkers:
-        return 'Drinkers only ($n)';
-      case AssignMode.nonDrinkers:
-        return 'Non-drinkers ($n)';
-      case AssignMode.group:
-        final g = state.groups
-            .where((g) => g.id == item.assignment.groupId)
-            .firstOrNull;
-        return 'Group: ${g?.name ?? '?'} ($n)';
-      case AssignMode.custom:
-        return n == 0 ? 'UNASSIGNED — tap to fix' : 'Selected people ($n)';
-    }
-  }
-}
-
-class _CategoryDot extends StatelessWidget {
-  const _CategoryDot({required this.category});
-  final String category;
-
-  @override
-  Widget build(BuildContext context) {
-    final color = switch (category) {
-      // Categorical encoding, deliberately NOT mapped onto ColorScheme slots.
-      // These four say "which category", not "which theme role", and a
-      // single-accent design system has no four distinct hues to lend. Folding
-      // them into primary/secondary/tertiary would make the categories stop
-      // being distinguishable, which is the only job they have. Tracked in
-      // unified-design-system/nielsen-audit.md as needing a categorical ramp.
-      Categories.alcohol => Colors.deepOrange,
-      Categories.mixer => Colors.amber,
-      Categories.deposit => Colors.blueGrey,
-      _ => Colors.teal,
-    };
-    return CircleAvatar(radius: 6, backgroundColor: color);
-  }
-}
-
-class _TotalsView extends StatelessWidget {
-  const _TotalsView({required this.receipt, required this.split});
-  final Receipt receipt;
-  final SplitResult split;
-
-  @override
-  Widget build(BuildContext context) {
-    final state = context.read<AppState>();
-    final people = receiptParticipants(receipt, state.people)
-      ..sort((a, b) => a.name.toLowerCase().compareTo(b.name.toLowerCase()));
-    final itemsTotal = receipt.itemsTotalGr;
-    final assigned = split.assignedTotalGr;
-    final paid = receipt.paidTotalGr;
-
-    return ListView(
-      padding: const EdgeInsets.all(16),
-      children: [
-        if (split.unassigned.isNotEmpty)
-          Card(
-            color: Theme.of(context).colorScheme.errorContainer,
-            child: Padding(
-              padding: const EdgeInsets.all(12),
-              child: Text(
-                '${split.unassigned.length} item(s) have nobody assigned and '
-                'are excluded from totals:\n'
-                '${split.unassigned.map((i) => '· ${i.name}').join('\n')}',
-                style: TextStyle(
-                  color: Theme.of(context).colorScheme.onErrorContainer,
-                ),
-              ),
-            ),
-          ),
-        for (final p in people)
-          _PersonRow(person: p, total: split.perPerson[p.id]),
-        const Divider(height: 32),
-        _kv(context, 'Items total', formatPln(itemsTotal), bold: true),
-        _kv(
-          context,
-          'Assigned to people',
-          formatPln(assigned),
-          warn: assigned != itemsTotal,
-        ),
-        if (paid != null)
-          _kv(
-            context,
-            'Paid (receipt)',
-            formatPln(paid),
-            warn: paid != itemsTotal,
-          ),
-        const SizedBox(height: 8),
-        Text(
-          'Splits are grosz-exact: shares always add up to the item total, '
-          'so no fractional grosze are lost.',
-          style: Theme.of(context).textTheme.bodySmall,
-        ),
-      ],
-    );
-  }
-
-  Widget _kv(
-    BuildContext context,
-    String k,
-    String v, {
-    bool bold = false,
-    bool warn = false,
-  }) {
-    final style = TextStyle(
-      fontWeight: bold || warn ? FontWeight.bold : null,
-      color: warn ? Theme.of(context).colorScheme.error : null,
-    );
-    return Padding(
-      padding: const EdgeInsets.symmetric(vertical: 2),
-      child: Row(
-        mainAxisAlignment: MainAxisAlignment.spaceBetween,
-        children: [Text(k, style: style), Text(v, style: style)],
-      ),
-    );
-  }
-}
-
-class _PersonRow extends StatelessWidget {
-  const _PersonRow({required this.person, required this.total});
-  final Person person;
-  final PersonTotal? total;
-
-  @override
-  Widget build(BuildContext context) {
-    final t = total;
-    return ListTile(
-      contentPadding: EdgeInsets.zero,
-      leading: CircleAvatar(
-        child: Text(
-          person.name.isEmpty ? '?' : person.name.substring(0, 1).toUpperCase(),
-        ),
-      ),
-      title: Text(person.name),
-      subtitle: t == null || t.alcoholGr == 0
-          ? null
-          : Text(
-              'alcohol ${formatPln(t.alcoholGr)} · rest ${formatPln(t.restGr)}',
-            ),
-      trailing: Text(
-        formatPln(t?.totalGr ?? 0),
-        style: Theme.of(context).textTheme.titleMedium,
-      ),
-    );
-  }
-}
-
-extension<T> on Iterable<T> {
-  T? get firstOrNull => isEmpty ? null : first;
-}

billsplit/lib/ui/receipt_screen.dart

@@ -1,211 +0,0 @@
-import 'package:billsplit/domain/models.dart';
-import 'package:billsplit/domain/split_engine.dart';
-import 'package:billsplit/domain/xlsx_export.dart';
-import 'package:billsplit/state/app_state.dart';
-import 'package:billsplit/ui/assignment_sheet.dart';
-import 'package:billsplit/ui/item_edit.dart';
-import 'package:file_selector/file_selector.dart';
-import 'package:flutter/foundation.dart';
-import 'package:flutter/material.dart';
-import 'package:provider/provider.dart';
-
-part 'receipt_items.dart';
-
-/// Writes exported [bytes] to [path]; the seam the export flow writes through.
-///
-/// Kept injectable because `file_selector` only returns a destination — the
-/// app performs the write itself, where `file_picker` did it inside the
-/// plugin. Real `dart:io` futures never complete inside `testWidgets`'
-/// fake-async zone, so a widget test that exercised the real write could never
-/// observe the resulting snackbar. Tests swap this for an in-memory stub.
-typedef ExportWriter = Future<void> Function(
-  String path,
-  Uint8List bytes,
-  String mimeType,
-);
-
-/// The active export writer. Replaced in tests via [debugSetExportWriter].
-ExportWriter writeExport = _writeExportToDisk;
-
-Future<void> _writeExportToDisk(
-  String path,
-  Uint8List bytes,
-  String mimeType,
-) =>
-    XFile.fromData(bytes, mimeType: mimeType).saveTo(path);
-
-/// Overrides [writeExport]; pass null to restore the real disk writer.
-@visibleForTesting
-void debugSetExportWriter(ExportWriter? writer) {
-  writeExport = writer ?? _writeExportToDisk;
-}
-
-/// One receipt: item list with assignments, totals, participants, export.
-class ReceiptScreen extends StatefulWidget {
-  /// Creates the screen for the receipt with [receiptId].
-  const ReceiptScreen({required this.receiptId, super.key});
-
-  /// Id of the receipt to show; resolved against [AppState.receipts].
-  final String receiptId;
-
-  @override
-  State<ReceiptScreen> createState() => _ReceiptScreenState();
-}
-
-class _ReceiptScreenState extends State<ReceiptScreen> {
-  @override
-  Widget build(BuildContext context) {
-    final state = context.watch<AppState>();
-    final receipt =
-        state.receipts.where((r) => r.id == widget.receiptId).firstOrNull;
-    if (receipt == null) {
-      return const Scaffold(body: Center(child: Text('Receipt deleted.')));
-    }
-    final split = computeSplit(receipt, state.people, state.groups);
-    final wide = MediaQuery.of(context).size.width > 800;
-
-    final itemsList = _ItemsList(receipt: receipt, split: split);
-    final totals = _TotalsView(receipt: receipt, split: split);
-
-    return DefaultTabController(
-      length: 2,
-      child: Scaffold(
-        appBar: AppBar(
-          title: Text(receipt.title, overflow: TextOverflow.ellipsis),
-          actions: [
-            IconButton(
-              tooltip: 'Participants',
-              icon: const Icon(Icons.group),
-              onPressed: () => _editParticipants(context, state, receipt),
-            ),
-            IconButton(
-              tooltip: 'Export .xlsx',
-              icon: const Icon(Icons.table_view),
-              onPressed: () => _export(context, state, receipt),
-            ),
-          ],
-          bottom: wide
-              ? null
-              : const TabBar(
-                  tabs: [
-                    Tab(text: 'Items'),
-                    Tab(text: 'Totals'),
-                  ],
-                ),
-        ),
-        floatingActionButton: FloatingActionButton(
-          tooltip: 'Add item',
-          child: const Icon(Icons.add),
-          onPressed: () => showItemEditDialog(context, state, receipt, null),
-        ),
-        body: wide
-            ? Row(
-                children: [
-                  Expanded(flex: 3, child: itemsList),
-                  const VerticalDivider(width: 1),
-                  Expanded(flex: 2, child: totals),
-                ],
-              )
-            : TabBarView(children: [itemsList, totals]),
-      ),
-    );
-  }
-
-  Future<void> _editParticipants(
-    BuildContext context,
-    AppState state,
-    Receipt receipt,
-  ) async {
-    if (state.people.isEmpty) {
-      ScaffoldMessenger.of(context).showSnackBar(
-        const SnackBar(
-          content: Text('Add people first (People & groups screen).'),
-        ),
-      );
-      return;
-    }
-    await showModalBottomSheet<void>(
-      context: context,
-      builder: (c) => StatefulBuilder(
-        builder: (c, setSheet) => SafeArea(
-          child: ListView(
-            shrinkWrap: true,
-            children: [
-              Padding(
-                padding: const EdgeInsets.all(16),
-                child: Text(
-                  'Who is on this receipt?',
-                  style: Theme.of(c).textTheme.titleMedium,
-                ),
-              ),
-              for (final p in state.people)
-                CheckboxListTile(
-                  title: Text(p.name),
-                  subtitle: p.drinks ? null : const Text('non-drinker'),
-                  value: receipt.participantIds.contains(p.id),
-                  onChanged: (v) {
-                    state.mutate(() {
-                      if (v == true) {
-                        receipt.participantIds.add(p.id);
-                      } else {
-                        receipt.participantIds.remove(p.id);
-                      }
-                    });
-                    setSheet(() {});
-                  },
-                ),
-            ],
-          ),
-        ),
-      ),
-    );
-  }
-
-  Future<void> _export(
-    BuildContext context,
-    AppState state,
-    Receipt receipt,
-  ) async {
-    final messenger = ScaffoldMessenger.of(context);
-    if (receipt.participantIds.isEmpty) {
-      messenger.showSnackBar(
-        const SnackBar(content: Text('Add participants before exporting.')),
-      );
-      return;
-    }
-    try {
-      final bytes = Uint8List.fromList(
-        exportXlsx(
-          receipt: receipt,
-          roster: state.people,
-          groups: state.groups,
-        ),
-      );
-      final safe = receipt.title.replaceAll(
-        RegExp(r'[^\w\d ąćęłńóśżźĄĆĘŁŃÓŚŻŹ-]'),
-        '_',
-      );
-      const xlsxGroup = XTypeGroup(
-        label: 'Excel workbook',
-        extensions: ['xlsx'],
-        mimeTypes: [
-          'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
-        ],
-      );
-      final location = await getSaveLocation(
-        suggestedName: '$safe split.xlsx',
-        acceptedTypeGroups: [xlsxGroup],
-      );
-      if (location != null) {
-        // file_selector hands back a destination and leaves the writing to the
-        // caller, unlike file_picker which wrote the bytes inside the plugin.
-        await writeExport(location.path, bytes, xlsxGroup.mimeTypes!.first);
-        messenger.showSnackBar(
-          SnackBar(content: Text('Saved: ${location.path.split('/').last}')),
-        );
-      }
-    } on Exception catch (e) {
-      messenger.showSnackBar(SnackBar(content: Text('Export failed: $e')));
-    }
-  }
-}

billsplit/pubspec.lock

@@ -1,611 +0,0 @@
-# Generated by pub
-# See https://dart.dev/tools/pub/glossary#lockfile
-packages:
-  archive:
-    dependency: transitive
-    description:
-      name: archive
-      sha256: cb6a278ef2dbb298455e1a713bda08524a175630ec643a242c399c932a0a1f7d
-      url: "https://pub.dev"
-    source: hosted
-    version: "3.6.1"
-  args:
-    dependency: transitive
-    description:
-      name: args
-      sha256: d0481093c50b1da8910eb0bb301626d4d8eb7284aa739614d2b394ee09e3ea04
-      url: "https://pub.dev"
-    source: hosted
-    version: "2.7.0"
-  async:
-    dependency: transitive
-    description:
-      name: async
-      sha256: e2eb0491ba5ddb6177742d2da23904574082139b07c1e33b8503b9f46f3e1a37
-      url: "https://pub.dev"
-    source: hosted
-    version: "2.13.1"
-  boolean_selector:
-    dependency: transitive
-    description:
-      name: boolean_selector
-      sha256: "8aab1771e1243a5063b8b0ff68042d67334e3feab9e95b9490f9a6ebf73b42ea"
-      url: "https://pub.dev"
-    source: hosted
-    version: "2.1.2"
-  characters:
-    dependency: transitive
-    description:
-      name: characters
-      sha256: faf38497bda5ead2a8c7615f4f7939df04333478bf32e4173fcb06d428b5716b
-      url: "https://pub.dev"
-    source: hosted
-    version: "1.4.1"
-  checked_yaml:
-    dependency: transitive
-    description:
-      name: checked_yaml
-      sha256: "959525d3162f249993882720d52b7e0c833978df229be20702b33d48d91de70f"
-      url: "https://pub.dev"
-    source: hosted
-    version: "2.0.4"
-  cli_util:
-    dependency: transitive
-    description:
-      name: cli_util
-      sha256: ff6785f7e9e3c38ac98b2fb035701789de90154024a75b6cb926445e83197d1c
-      url: "https://pub.dev"
-    source: hosted
-    version: "0.4.2"
-  clock:
-    dependency: transitive
-    description:
-      name: clock
-      sha256: fddb70d9b5277016c77a80201021d40a2247104d9f4aa7bab7157b7e3f05b84b
-      url: "https://pub.dev"
-    source: hosted
-    version: "1.1.2"
-  code_assets:
-    dependency: transitive
-    description:
-      name: code_assets
-      sha256: bf394f466ba9205f1812a0433b392d6af280f155f56651eda7c18cc32ed493b8
-      url: "https://pub.dev"
-    source: hosted
-    version: "1.2.1"
-  collection:
-    dependency: transitive
-    description:
-      name: collection
-      sha256: "2f5709ae4d3d59dd8f7cd309b4e023046b57d8a6c82130785d2b0e5868084e76"
-      url: "https://pub.dev"
-    source: hosted
-    version: "1.19.1"
-  cross_file:
-    dependency: transitive
-    description:
-      name: cross_file
-      sha256: "92c9c43c383bfa1c32079d3bc492d55d6d4318044b7b47edaff8971cbb555c51"
-      url: "https://pub.dev"
-    source: hosted
-    version: "0.3.5+4"
-  crypto:
-    dependency: transitive
-    description:
-      name: crypto
-      sha256: c8ea0233063ba03258fbcf2ca4d6dadfefe14f02fab57702265467a19f27fadf
-      url: "https://pub.dev"
-    source: hosted
-    version: "3.0.7"
-  design_system:
-    dependency: "direct main"
-    description:
-      path: design_system
-      ref: "design_system-v0.1.0"
-      resolved-ref: e6c9af81e9ac3000d87d9168d3ef87ba2979258b
-      url: "https://github.com/kuhyx/utils"
-    source: git
-    version: "0.1.0"
-  equatable:
-    dependency: transitive
-    description:
-      name: equatable
-      sha256: "3bce007a596ff8b3119c45d68aaef631272537c03d30e5d4534dd24bf4c5eaa2"
-      url: "https://pub.dev"
-    source: hosted
-    version: "2.1.0"
-  excel:
-    dependency: "direct main"
-    description:
-      name: excel
-      sha256: "1a15327dcad260d5db21d1f6e04f04838109b39a2f6a84ea486ceda36e468780"
-      url: "https://pub.dev"
-    source: hosted
-    version: "4.0.6"
-  fake_async:
-    dependency: transitive
-    description:
-      name: fake_async
-      sha256: "5368f224a74523e8d2e7399ea1638b37aecfca824a3cc4dfdf77bf1fa905ac44"
-      url: "https://pub.dev"
-    source: hosted
-    version: "1.3.3"
-  ffi:
-    dependency: transitive
-    description:
-      name: ffi
-      sha256: "6d7fd89431262d8f3125e81b50d3847a091d846eafcd4fdb88dd06f36d705a45"
-      url: "https://pub.dev"
-    source: hosted
-    version: "2.2.0"
-  file_selector:
-    dependency: "direct main"
-    description:
-      name: file_selector
-      sha256: bd15e43e9268db636b53eeaca9f56324d1622af30e5c34d6e267649758c84d9a
-      url: "https://pub.dev"
-    source: hosted
-    version: "1.1.0"
-  file_selector_android:
-    dependency: transitive
-    description:
-      name: file_selector_android
-      sha256: "1d45e9910f68c16eb0c74f0b10097ad81aed516ea28054c027137e8f7d75e840"
-      url: "https://pub.dev"
-    source: hosted
-    version: "0.5.2+9"
-  file_selector_ios:
-    dependency: transitive
-    description:
-      name: file_selector_ios
-      sha256: e2ecf2885c121691ce13b60db3508f53c01f869fb6e8dc5c1cfa771e4c46aeca
-      url: "https://pub.dev"
-    source: hosted
-    version: "0.5.3+5"
-  file_selector_linux:
-    dependency: transitive
-    description:
-      name: file_selector_linux
-      sha256: "2567f398e06ac72dcf2e98a0c95df2a9edd03c2c2e0cacd4780f20cdf56263a0"
-      url: "https://pub.dev"
-    source: hosted
-    version: "0.9.4"
-  file_selector_macos:
-    dependency: transitive
-    description:
-      name: file_selector_macos
-      sha256: "5e0bbe9c312416f1787a68259ea1505b52f258c587f12920422671807c4d618a"
-      url: "https://pub.dev"
-    source: hosted
-    version: "0.9.5"
-  file_selector_platform_interface:
-    dependency: "direct dev"
-    description:
-      name: file_selector_platform_interface
-      sha256: "35e0bd61ebcdb91a3505813b055b09b79dfdc7d0aee9c09a7ba59ae4bb13dc85"
-      url: "https://pub.dev"
-    source: hosted
-    version: "2.7.0"
-  file_selector_web:
-    dependency: transitive
-    description:
-      name: file_selector_web
-      sha256: "73181fbc5257776d8ecaa6a94ab3c8e920ad143b9132a6d984a9271dfc6928d3"
-      url: "https://pub.dev"
-    source: hosted
-    version: "0.9.5"
-  file_selector_windows:
-    dependency: transitive
-    description:
-      name: file_selector_windows
-      sha256: "62197474ae75893a62df75939c777763d39c2bc5f73ce5b88497208bc269abfd"
-      url: "https://pub.dev"
-    source: hosted
-    version: "0.9.3+5"
-  flutter:
-    dependency: "direct main"
-    description: flutter
-    source: sdk
-    version: "0.0.0"
-  flutter_launcher_icons:
-    dependency: "direct dev"
-    description:
-      name: flutter_launcher_icons
-      sha256: "10f13781741a2e3972126fae08393d3c4e01fa4cd7473326b94b72cf594195e7"
-      url: "https://pub.dev"
-    source: hosted
-    version: "0.14.4"
-  flutter_lints:
-    dependency: "direct dev"
-    description:
-      name: flutter_lints
-      sha256: "3105dc8492f6183fb076ccf1f351ac3d60564bff92e20bfc4af9cc1651f4e7e1"
-      url: "https://pub.dev"
-    source: hosted
-    version: "6.0.0"
-  flutter_test:
-    dependency: "direct dev"
-    description: flutter
-    source: sdk
-    version: "0.0.0"
-  flutter_web_plugins:
-    dependency: transitive
-    description: flutter
-    source: sdk
-    version: "0.0.0"
-  hooks:
-    dependency: transitive
-    description:
-      name: hooks
-      sha256: "9a62a50b50b769a737bc0a8ff381f333529df3ab746b2f6b02e83760231455ba"
-      url: "https://pub.dev"
-    source: hosted
-    version: "2.0.2"
-  http:
-    dependency: transitive
-    description:
-      name: http
-      sha256: "87721a4a50b19c7f1d49001e51409bddc46303966ce89a65af4f4e6004896412"
-      url: "https://pub.dev"
-    source: hosted
-    version: "1.6.0"
-  http_parser:
-    dependency: transitive
-    description:
-      name: http_parser
-      sha256: "178d74305e7866013777bab2c3d8726205dc5a4dd935297175b19a23a2e66571"
-      url: "https://pub.dev"
-    source: hosted
-    version: "4.1.2"
-  image:
-    dependency: transitive
-    description:
-      name: image
-      sha256: f31d52537dc417fdcde36088fdf11d191026fd5e4fae742491ebd40e5a8bea7d
-      url: "https://pub.dev"
-    source: hosted
-    version: "4.3.0"
-  jni:
-    dependency: transitive
-    description:
-      name: jni
-      sha256: f038e58b4dc2c9037f50e233175086337e0b305e356d28211bf55f21c504cbd3
-      url: "https://pub.dev"
-    source: hosted
-    version: "1.0.3"
-  jni_flutter:
-    dependency: transitive
-    description:
-      name: jni_flutter
-      sha256: "7b717011ea40d04fd47c2731d3d1d36eb99eba3435c2753d62489e8c3c9991d5"
-      url: "https://pub.dev"
-    source: hosted
-    version: "1.0.2"
-  jni_util:
-    dependency: transitive
-    description:
-      name: jni_util
-      sha256: "1ba86da04a5f2bf18fde2edb235587e70c5b0fc5bd4ba955f46b00942c3fc35f"
-      url: "https://pub.dev"
-    source: hosted
-    version: "1.0.0"
-  json_annotation:
-    dependency: transitive
-    description:
-      name: json_annotation
-      sha256: "2a743920d81b7910627f68ee2c9ac1fc0bfee32b9fc3403587d7c6791ca12f80"
-      url: "https://pub.dev"
-    source: hosted
-    version: "4.12.0"
-  leak_tracker:
-    dependency: transitive
-    description:
-      name: leak_tracker
-      sha256: "33e2e26bdd85a0112ec15400c8cbffea70d0f9c3407491f672a2fad47915e2de"
-      url: "https://pub.dev"
-    source: hosted
-    version: "11.0.2"
-  leak_tracker_flutter_testing:
-    dependency: transitive
-    description:
-      name: leak_tracker_flutter_testing
-      sha256: "1dbc140bb5a23c75ea9c4811222756104fbcd1a27173f0c34ca01e16bea473c1"
-      url: "https://pub.dev"
-    source: hosted
-    version: "3.0.10"
-  leak_tracker_testing:
-    dependency: transitive
-    description:
-      name: leak_tracker_testing
-      sha256: "8d5a2d49f4a66b49744b23b018848400d23e54caf9463f4eb20df3eb8acb2eb1"
-      url: "https://pub.dev"
-    source: hosted
-    version: "3.0.2"
-  lints:
-    dependency: transitive
-    description:
-      name: lints
-      sha256: "12f842a479589fea194fe5c5a3095abc7be0c1f2ddfa9a0e76aed1dbd26a87df"
-      url: "https://pub.dev"
-    source: hosted
-    version: "6.1.0"
-  logging:
-    dependency: transitive
-    description:
-      name: logging
-      sha256: c8245ada5f1717ed44271ed1c26b8ce85ca3228fd2ffdb75468ab01979309d61
-      url: "https://pub.dev"
-    source: hosted
-    version: "1.3.0"
-  matcher:
-    dependency: transitive
-    description:
-      name: matcher
-      sha256: "31bd099b47c10cd1aeb55146a2d46ce0277630ecef3f7dae54ad7873f36696cd"
-      url: "https://pub.dev"
-    source: hosted
-    version: "0.12.20"
-  material_color_utilities:
-    dependency: transitive
-    description:
-      name: material_color_utilities
-      sha256: "9c337007e82b1889149c82ed242ed1cb24a66044e30979c44912381e9be4c48b"
-      url: "https://pub.dev"
-    source: hosted
-    version: "0.13.0"
-  meta:
-    dependency: transitive
-    description:
-      name: meta
-      sha256: "307249ce4ff29d58a18e97f6345f539382eb9c9c29ecda628900f31de0443dd9"
-      url: "https://pub.dev"
-    source: hosted
-    version: "1.19.0"
-  nested:
-    dependency: transitive
-    description:
-      name: nested
-      sha256: "03bac4c528c64c95c722ec99280375a6f2fc708eec17c7b3f07253b626cd2a20"
-      url: "https://pub.dev"
-    source: hosted
-    version: "1.0.0"
-  objective_c:
-    dependency: transitive
-    description:
-      name: objective_c
-      sha256: b7fb95a6d9a4f009edd63dc5ac69f07420b23a16161c6dd8660290b59c602e8e
-      url: "https://pub.dev"
-    source: hosted
-    version: "9.5.0"
-  package_config:
-    dependency: transitive
-    description:
-      name: package_config
-      sha256: ffcf4cf3d6c0b74ac43708d9f56625506e8a68aa935abe9d267a7330f320eb5d
-      url: "https://pub.dev"
-    source: hosted
-    version: "3.0.0"
-  path:
-    dependency: transitive
-    description:
-      name: path
-      sha256: "75cca69d1490965be98c73ceaea117e8a04dd21217b37b292c9ddbec0d955bc5"
-      url: "https://pub.dev"
-    source: hosted
-    version: "1.9.1"
-  path_provider:
-    dependency: "direct main"
-    description:
-      name: path_provider
-      sha256: a7f4874f987173da295a61c181b8ee71dab59b332a486b391babf26a1b884825
-      url: "https://pub.dev"
-    source: hosted
-    version: "2.1.6"
-  path_provider_android:
-    dependency: transitive
-    description:
-      name: path_provider_android
-      sha256: "69cbd515a62b94d32a7944f086b2f82b4ac40a1d45bebfc00813a430ab2dabcd"
-      url: "https://pub.dev"
-    source: hosted
-    version: "2.3.1"
-  path_provider_foundation:
-    dependency: transitive
-    description:
-      name: path_provider_foundation
-      sha256: "2a376b7d6392d80cd3705782d2caa734ca4727776db0b6ec36ef3f1855197699"
-      url: "https://pub.dev"
-    source: hosted
-    version: "2.6.0"
-  path_provider_linux:
-    dependency: transitive
-    description:
-      name: path_provider_linux
-      sha256: "58c2005f147315b11e9b4a7bc889cd5203e250cba8e3f012dae259b4972b5c16"
-      url: "https://pub.dev"
-    source: hosted
-    version: "2.2.2"
-  path_provider_platform_interface:
-    dependency: transitive
-    description:
-      name: path_provider_platform_interface
-      sha256: "484838772624c3a4b94f1e44a3e19897fee738f2d5c4ce448443b0417f7c9dda"
-      url: "https://pub.dev"
-    source: hosted
-    version: "2.1.3"
-  path_provider_windows:
-    dependency: transitive
-    description:
-      name: path_provider_windows
-      sha256: bd6f00dbd873bfb70d0761682da2b3a2c2fccc2b9e84c495821639601d81afe7
-      url: "https://pub.dev"
-    source: hosted
-    version: "2.3.0"
-  petitparser:
-    dependency: transitive
-    description:
-      name: petitparser
-      sha256: "91bd59303e9f769f108f8df05e371341b15d59e995e6806aefab827b58336675"
-      url: "https://pub.dev"
-    source: hosted
-    version: "7.0.2"
-  platform:
-    dependency: transitive
-    description:
-      name: platform
-      sha256: "5d6b1b0036a5f331ebc77c850ebc8506cbc1e9416c27e59b439f917a902a4984"
-      url: "https://pub.dev"
-    source: hosted
-    version: "3.1.6"
-  plugin_platform_interface:
-    dependency: transitive
-    description:
-      name: plugin_platform_interface
-      sha256: "4820fbfdb9478b1ebae27888254d445073732dae3d6ea81f0b7e06d5dedc3f02"
-      url: "https://pub.dev"
-    source: hosted
-    version: "2.1.8"
-  provider:
-    dependency: "direct main"
-    description:
-      name: provider
-      sha256: "4e82183fa20e5ca25703ead7e05de9e4cceed1fbd1eadc1ac3cb6f565a09f272"
-      url: "https://pub.dev"
-    source: hosted
-    version: "6.1.5+1"
-  pub_semver:
-    dependency: transitive
-    description:
-      name: pub_semver
-      sha256: "5bfcf68ca79ef689f8990d1160781b4bad40a3bd5e5218ad4076ddb7f4081585"
-      url: "https://pub.dev"
-    source: hosted
-    version: "2.2.0"
-  record_use:
-    dependency: transitive
-    description:
-      name: record_use
-      sha256: "2551bd8eecfe95d14ae75f6021ad0248be5c27f138c2ec12fcb52b500b3ba1ed"
-      url: "https://pub.dev"
-    source: hosted
-    version: "0.6.0"
-  sky_engine:
-    dependency: transitive
-    description: flutter
-    source: sdk
-    version: "0.0.0"
-  source_span:
-    dependency: transitive
-    description:
-      name: source_span
-      sha256: "56a02f1f4cd1a2d96303c0144c93bd6d909eea6bee6bf5a0e0b685edbd4c47ab"
-      url: "https://pub.dev"
-    source: hosted
-    version: "1.10.2"
-  stack_trace:
-    dependency: transitive
-    description:
-      name: stack_trace
-      sha256: "8b27215b45d22309b5cddda1aa2b19bdfec9df0e765f2de506401c071d38d1b1"
-      url: "https://pub.dev"
-    source: hosted
-    version: "1.12.1"
-  stream_channel:
-    dependency: transitive
-    description:
-      name: stream_channel
-      sha256: "969e04c80b8bcdf826f8f16579c7b14d780458bd97f56d107d3950fdbeef059d"
-      url: "https://pub.dev"
-    source: hosted
-    version: "2.1.4"
-  string_scanner:
-    dependency: transitive
-    description:
-      name: string_scanner
-      sha256: "921cd31725b72fe181906c6a94d987c78e3b98c2e205b397ea399d4054872b43"
-      url: "https://pub.dev"
-    source: hosted
-    version: "1.4.1"
-  term_glyph:
-    dependency: transitive
-    description:
-      name: term_glyph
-      sha256: "7f554798625ea768a7518313e58f83891c7f5024f88e46e7182a4558850a4b8e"
-      url: "https://pub.dev"
-    source: hosted
-    version: "1.2.2"
-  test_api:
-    dependency: transitive
-    description:
-      name: test_api
-      sha256: "2a122cbe059f8b610d3a5415f42e255b6c17b1f21eee1d960f31080237fb4f11"
-      url: "https://pub.dev"
-    source: hosted
-    version: "0.7.12"
-  typed_data:
-    dependency: transitive
-    description:
-      name: typed_data
-      sha256: f9049c039ebfeb4cf7a7104a675823cd72dba8297f264b6637062516699fa006
-      url: "https://pub.dev"
-    source: hosted
-    version: "1.4.0"
-  vector_math:
-    dependency: transitive
-    description:
-      name: vector_math
-      sha256: f36f9f3be64c6198714492bb455c11056e33e2f85d9a0b676a48301e44fdcf47
-      url: "https://pub.dev"
-    source: hosted
-    version: "2.4.2"
-  very_good_analysis:
-    dependency: "direct dev"
-    description:
-      name: very_good_analysis
-      sha256: "481af67ab5877af20325251dc215a4ebac7666a1c8cf09198ffd457bc612b33d"
-      url: "https://pub.dev"
-    source: hosted
-    version: "10.3.0"
-  vm_service:
-    dependency: transitive
-    description:
-      name: vm_service
-      sha256: "0016aef94fc66495ac78af5859181e3f3bf2026bd8eecc72b9565601e19ab360"
-      url: "https://pub.dev"
-    source: hosted
-    version: "15.2.0"
-  web:
-    dependency: transitive
-    description:
-      name: web
-      sha256: "868d88a33d8a87b18ffc05f9f030ba328ffefba92d6c127917a2ba740f9cfe4a"
-      url: "https://pub.dev"
-    source: hosted
-    version: "1.1.1"
-  xdg_directories:
-    dependency: transitive
-    description:
-      name: xdg_directories
-      sha256: "7a3f37b05d989967cdddcbb571f1ea834867ae2faa29725fd085180e0883aa15"
-      url: "https://pub.dev"
-    source: hosted
-    version: "1.1.0"
-  xml:
-    dependency: transitive
-    description:
-      name: xml
-      sha256: "971043b3a0d3da28727e40ed3e0b5d18b742fa5a68665cca88e74b7876d5e025"
-      url: "https://pub.dev"
-    source: hosted
-    version: "6.6.1"
-  yaml:
-    dependency: transitive
-    description:
-      name: yaml
-      sha256: b9da305ac7c39faa3f030eccd175340f968459dae4af175130b3fc47e40d76ce
-      url: "https://pub.dev"
-    source: hosted
-    version: "3.1.3"
-sdks:
-  dart: ">=3.12.2 <4.0.0"
-  flutter: ">=3.44.0"

billsplit/pubspec.yaml

@@ -1,45 +0,0 @@
-name: billsplit
-description: Receipt bill-splitting with people, groups, per-item assignment and xlsx export.
-publish_to: "none"
-version: 0.1.0
-
-environment:
-  sdk: ^3.5.0
-
-dependencies:
-  # The shared palette and scales.
-  design_system:
-    git:
-      url: https://github.com/kuhyx/utils
-      ref: design_system-v0.1.0
-      path: design_system
-
-  excel: ^4.0.6
-  file_selector: ^1.1.0
-  flutter:
-    sdk: flutter
-  path_provider: ^2.1.4
-  provider: ^6.1.2
-
-dev_dependencies:
-  file_selector_platform_interface: ^2.7.0
-  flutter_launcher_icons: ^0.14.4
-  flutter_lints: ^6.0.0
-  flutter_test:
-    sdk: flutter
-  very_good_analysis: ^10.3.0
-
-flutter:
-  uses-material-design: true
-
-# Launcher icon generation. Source art is produced by the shared generator:
-#   PYTHONPATH=~/testsAndMisc python3 -m python_pkg.app_icons generate --app billsplit
-# then run: dart run flutter_launcher_icons
-flutter_launcher_icons:
-  android: true
-  ios: false
-  image_path: "assets/icon/icon.png"
-  adaptive_icon_background: "#211D1B"
-  adaptive_icon_foreground: "assets/icon/icon_foreground.png"
-  adaptive_icon_monochrome: "assets/icon/icon_monochrome.png"
-  min_sdk_android: 21

billsplit/test/app_state_test.dart

@@ -1,184 +0,0 @@
-import 'dart:convert';
-import 'dart:io';
-
-import 'package:billsplit/domain/models.dart';
-import 'package:billsplit/state/app_state.dart';
-import 'package:flutter_test/flutter_test.dart';
-
-import 'helpers.dart';
-
-void main() {
-  TestWidgetsFlutterBinding.ensureInitialized();
-
-  Directory temp() {
-    final d = Directory.systemTemp.createTempSync('billsplit_state');
-    addTearDown(() {
-      if (d.existsSync()) d.deleteSync(recursive: true);
-    });
-    return d;
-  }
-
-  test('load on a fresh directory yields empty, usable state', () async {
-    final s = AppState(overrideDir: temp());
-    await s.load();
-    expect(s.loaded, isTrue);
-    expect(s.people, isEmpty);
-    s.dispose();
-  });
-
-  test('save/load roundtrip preserves everything', () async {
-    final dir = temp();
-    final s = AppState(overrideDir: dir);
-    await s.load();
-    final p = s.addPerson('Ala', drinks: false);
-    final g = s.addGroup('Meat')..memberIds.add(p.id);
-    s.addReceipt(
-      Receipt(
-        id: 'r1',
-        title: 'T',
-        items: [
-          Item(
-            id: 'i1',
-            name: 'x',
-            totalGr: 100,
-            assignment: Assignment(mode: AssignMode.group, groupId: g.id),
-          ),
-        ],
-      ),
-    );
-    await s.save();
-    s.dispose();
-
-    final s2 = AppState(overrideDir: dir);
-    await s2.load();
-    expect(s2.people.single.name, 'Ala');
-    expect(s2.people.single.drinks, isFalse);
-    expect(s2.groups.single.memberIds, {p.id});
-    expect(s2.receipts.single.participantIds, {p.id});
-    expect(s2.receipts.single.items.single.assignment.groupId, g.id);
-    s2.dispose();
-  });
-
-  test('load prunes dangling person references', () async {
-    final dir = temp();
-    File('${dir.path}/billsplit/state.json')
-      ..createSync(recursive: true)
-      ..writeAsStringSync(
-        jsonEncode({
-          'people': [
-            {'id': 'p1', 'name': 'Ala'},
-          ],
-          'groups': [
-            {
-              'id': 'g1',
-              'name': 'G',
-              'memberIds': ['p1', 'ghost'],
-            },
-          ],
-          'receipts': [
-            {
-              'id': 'r1',
-              'title': 'T',
-              'date': '2026-01-01T00:00:00.000',
-              'participantIds': ['p1', 'ghost'],
-              'items': [
-                {
-                  'id': 'i1',
-                  'name': 'x',
-                  'totalGr': 1,
-                  'assignment': {
-                    'mode': 'custom',
-                    'customIds': ['p1', 'ghost'],
-                  },
-                },
-              ],
-            },
-          ],
-        }),
-      );
-    final s = AppState(overrideDir: dir);
-    await s.load();
-    expect(s.groups.single.memberIds, {'p1'});
-    expect(s.receipts.single.participantIds, {'p1'});
-    expect(s.receipts.single.items.single.assignment.customIds, {'p1'});
-    s.dispose();
-  });
-
-  test('corrupt JSON is survived', () async {
-    final dir = temp();
-    File('${dir.path}/billsplit/state.json')
-      ..createSync(recursive: true)
-      ..writeAsStringSync('{oops');
-    final s = AppState(overrideDir: dir);
-    await s.load();
-    expect(s.loaded, isTrue);
-    expect(s.people, isEmpty);
-    s.dispose();
-  });
-
-  test('IO failure on load is survived (billsplit path is a file)', () async {
-    final dir = temp();
-    File('${dir.path}/billsplit').createSync(recursive: true);
-    final s = AppState(overrideDir: dir);
-    await s.load();
-    expect(s.loaded, isTrue);
-    s.dispose();
-  });
-
-  test('IO failure on save is survived (state.json is a directory)', () async {
-    final dir = temp();
-    Directory('${dir.path}/billsplit/state.json').createSync(recursive: true);
-    final s = AppState(overrideDir: dir);
-    await s.save(); // must not throw
-    s.dispose();
-  });
-
-  test('mutations debounce into a save', () async {
-    final dir = temp();
-    final s = AppState(overrideDir: dir);
-    await s.load();
-    s.addPerson('Ala');
-    expect(File('${dir.path}/billsplit/state.json').existsSync(), isFalse);
-    await Future<void>.delayed(const Duration(milliseconds: 600));
-    expect(File('${dir.path}/billsplit/state.json').existsSync(), isTrue);
-    s.dispose();
-  });
-
-  test('removePerson / removeGroup fallback / removeReceipt', () async {
-    final s = AppState(overrideDir: temp());
-    await s.load();
-    final p = s.addPerson('Ala');
-    final g = s.addGroup('G')..memberIds.add(p.id);
-    final item = Item(
-      id: 'i1',
-      name: 'x',
-      totalGr: 1,
-      assignment: Assignment(mode: AssignMode.group, groupId: g.id),
-    );
-    final r = Receipt(id: 'r1', title: 'T', items: [item]);
-    s
-      ..addReceipt(r)
-      ..removeGroup(g);
-    expect(item.assignment.mode, AssignMode.everyone);
-    expect(item.assignment.groupId, isNull);
-
-    s.removePerson(p);
-    expect(r.participantIds, isEmpty);
-
-    s.removeReceipt(r);
-    expect(s.receipts, isEmpty);
-    s.dispose();
-  });
-
-  test('default documents dir is used when no override is given', () async {
-    final dir = temp();
-    mockPathProvider(dir);
-    addTearDown(clearChannelMocks);
-    final s = AppState();
-    await s.load();
-    s.addPerson('Ala');
-    await s.save();
-    expect(File('${dir.path}/billsplit/state.json').existsSync(), isTrue);
-    s.dispose();
-  });
-}

billsplit/test/engine_extra_test.dart

@@ -1,29 +0,0 @@
-import 'package:billsplit/domain/split_engine.dart';
-import 'package:billsplit/domain/xlsx_export.dart';
-import 'package:flutter_test/flutter_test.dart';
-
-void main() {
-  test('splitAmount with no people returns empty', () {
-    expect(splitAmount(100, const []), isEmpty);
-  });
-
-  test('splitAmount accepts negative rotation', () {
-    final s = splitAmount(10, ['a', 'b', 'c'], rotation: -1);
-    expect(s.values.fold(0, (x, y) => x + y), 10);
-  });
-
-  test('stableHash is stable and differs between strings', () {
-    expect(stableHash(''), 0);
-    expect(stableHash('abc'), stableHash('abc'));
-    expect(stableHash('abc'), isNot(stableHash('abd')));
-  });
-
-  test('colName covers single and multi letter columns', () {
-    expect(colName(0), 'A');
-    expect(colName(25), 'Z');
-    expect(colName(26), 'AA');
-    expect(colName(27), 'AB');
-    expect(colName(701), 'ZZ');
-    expect(colName(702), 'AAA');
-  });
-}

billsplit/test/eparagon_edge_test.dart

@@ -1,232 +0,0 @@
-import 'dart:convert';
-
-import 'package:billsplit/domain/eparagon_parser.dart';
-import 'package:billsplit/domain/models.dart';
-import 'package:flutter_test/flutter_test.dart';
-
-Map<String, dynamic> minimalPayload({
-  List<dynamic>? pozycja,
-  Map<String, dynamic>? extraParagon,
-  Map<String, dynamic>? dokumentExtra,
-}) {
-  return {
-    'dokument': {
-      ...?dokumentExtra,
-      'paragon': {
-        if (pozycja != null) 'pozycja': pozycja,
-        ...?extraParagon,
-      },
-    },
-  };
-}
-
-Map<String, dynamic> towar(String name, int brutto) => {
-      'towar': {
-        'nazwa': name,
-        'ilosc': '1,000',
-        'cena': brutto,
-        'brutto': brutto,
-      },
-    };
-
-String asJws(Map<String, dynamic> payload) {
-  final body = base64Url.encode(utf8.encode(jsonEncode(payload)));
-  return 'eyJh.$body.sig';
-}
-
-void main() {
-  test('exception toString carries the message', () {
-    expect(
-      EParagonParseException('boom').toString(),
-      'EParagonParseException: boom',
-    );
-  });
-
-  test('bare JWS with non-map payload is rejected', () {
-    final body = base64Url.encode(utf8.encode('123'));
-    expect(
-      () => parseEParagon('h.$body.s'),
-      throwsA(isA<EParagonParseException>()),
-    );
-  });
-
-  test('three-part token with invalid base64 payload is rejected', () {
-    expect(
-      () => parseEParagon('aa.§§§.bb'),
-      throwsA(isA<EParagonParseException>()),
-    );
-  });
-
-  test('JSON root that is not a map is rejected', () {
-    expect(
-      () => parseEParagon('[1, 2]'),
-      throwsA(isA<EParagonParseException>()),
-    );
-  });
-
-  test('wrapper with undecodable data field is rejected', () {
-    expect(
-      () => parseEParagon('{"data": "a.b"}'),
-      throwsA(
-        predicate(
-          (e) => e is EParagonParseException && e.message.contains('"data"'),
-        ),
-      ),
-    );
-  });
-
-  test('missing dokument / paragon / items are rejected with clear messages',
-      () {
-    expect(
-      () => parseEParagon(asJws({'dokument': 1})),
-      throwsA(
-        predicate(
-          (e) => e is EParagonParseException && e.message.contains('dokument'),
-        ),
-      ),
-    );
-    expect(
-      () => parseEParagon(jsonEncode({'dokument': <String, dynamic>{}})),
-      throwsA(
-        predicate(
-          (e) => e is EParagonParseException && e.message.contains('paragon'),
-        ),
-      ),
-    );
-    expect(
-      () => parseEParagon(jsonEncode(minimalPayload())),
-      throwsA(
-        predicate(
-          (e) =>
-              e is EParagonParseException && e.message.contains('line items'),
-        ),
-      ),
-    );
-  });
-
-  test('malformed pozycja entries are skipped, missing brutto warns', () {
-    final res = parseEParagonDetailed(
-      jsonEncode(
-        minimalPayload(
-          pozycja: [
-            1,
-            {'towar': 2},
-            {
-              'towar': {'nazwa': 'NoPrice', 'ilosc': 'x'},
-            },
-            {
-              'towar': {'nazwa': '  ', 'brutto': 5},
-            },
-            towar('Chleb', 500),
-          ],
-        ),
-      ),
-    );
-    expect(res.receipt.items.single.name, 'Chleb');
-    expect(res.warnings.single, contains('NoPrice'));
-    expect(res.receipt.items.single.qty, 1);
-  });
-
-  test('sumaBrutto mismatch produces a warning; paid falls back to sum', () {
-    final res = parseEParagonDetailed(
-      jsonEncode(
-        minimalPayload(
-          pozycja: [towar('Chleb', 500)],
-          extraParagon: {
-            'podsum': {'sumaBrutto': 600},
-            'opak': {
-              'wart': 100,
-              'daneOpak': [
-                {'nazwa': 'butelka', 'cena': 50, 'ilosc': 2000},
-                {'nazwa': 'zero', 'cena': 50, 'ilosc': 0},
-                1,
-              ],
-            },
-          },
-        ),
-      ),
-    );
-    expect(res.warnings.single, contains('differs'));
-    expect(res.receipt.paidTotalGr, 700); // 600 declared + 100 deposit
-    final deposit =
-        res.receipt.items.where((i) => i.category == Categories.deposit).single;
-    expect(deposit.totalGr, 100);
-    expect(deposit.qty, 2);
-  });
-
-  test('store aliasing, plain store names and date fallbacks', () {
-    final jm = parseEParagon(
-      asJws(
-        minimalPayload(
-          pozycja: [towar('Chleb', 500)],
-          dokumentExtra: {
-            'podmiot1': {'nazwaPod': ' JERONIMO MARTINS POLSKA S.A. '},
-          },
-        ),
-      ),
-    );
-    expect(jm.store, 'Biedronka');
-
-    final other = parseEParagon(
-      jsonEncode(
-        minimalPayload(
-          pozycja: [towar('Chleb', 500)],
-          dokumentExtra: {
-            'podmiot1': {'nazwaPod': 'Żabka'},
-            'naglowek': {'dataJPK': '2026-05-01T10:00:00'},
-          },
-        ),
-      ),
-    );
-    expect(other.store, 'Żabka');
-    expect(other.date.year, 2026);
-    expect(other.title, contains('Żabka 2026-05-01'));
-
-    final noStore = parseEParagon(
-      jsonEncode(
-        minimalPayload(
-          pozycja: [towar('Chleb', 500)],
-          dokumentExtra: {
-            'podmiot1': {'nazwaPod': '  '},
-          },
-        ),
-      ),
-    );
-    expect(noStore.store, isNull);
-    expect(noStore.date.year, DateTime.now().year);
-  });
-
-  test('quantity and int parsing variants', () {
-    final r = parseEParagon(
-      jsonEncode(
-        minimalPayload(
-          pozycja: [
-            {
-              'towar': {
-                'nazwa': 'Ser',
-                'ilosc': 2,
-                'cena': '100',
-                'brutto': 200.4,
-              },
-            },
-            {
-              'towar': {'nazwa': 'Mleko', 'ilosc': 'abc', 'brutto': 300},
-            },
-          ],
-        ),
-      ),
-    );
-    expect(r.items[0].qty, 2);
-    expect(r.items[0].unitPriceGr, 100);
-    expect(r.items[0].totalGr, 200);
-    expect(r.items[1].qty, 1);
-  });
-
-  test('mixer keyword tagging without alcohol', () {
-    final r = parseEParagon(
-      jsonEncode(minimalPayload(pozycja: [towar('Tonik cytrynowy', 400)])),
-    );
-    expect(r.items.single.category, Categories.mixer);
-    expect(r.items.single.assignment.mode, AssignMode.everyone);
-  });
-}

billsplit/test/eparagon_parser_test.dart

@@ -1,86 +0,0 @@
-import 'dart:io';
-
-import 'package:billsplit/domain/eparagon_parser.dart';
-import 'package:billsplit/domain/models.dart';
-import 'package:flutter_test/flutter_test.dart';
-
-void main() {
-  final fixture = File('test/fixtures/sample_receipt.json').readAsStringSync();
-
-  test('parses the real Biedronka e-paragon wrapper', () {
-    final res = parseEParagonDetailed(fixture);
-    final r = res.receipt;
-
-    // 49 goods lines + 1 deposit line.
-    expect(r.items.length, 50);
-    final deposit =
-        r.items.where((i) => i.category == Categories.deposit).toList();
-    expect(deposit.length, 1);
-    expect(deposit.single.totalGr, 700);
-    expect(deposit.single.qty, 14);
-
-    // Goods sum matches receipt sumaBrutto; paid total includes deposit.
-    final goods = r.items
-        .where((i) => i.category != Categories.deposit)
-        .fold(0, (s, i) => s + i.totalGr);
-    expect(goods, 59055);
-    expect(r.paidTotalGr, 59755);
-    expect(res.warnings, isEmpty);
-
-    // Alcohol detection: exactly vodka + beer, drinkers-only by default.
-    final alcohol =
-        r.items.where((i) => i.category == Categories.alcohol).toList();
-    expect(alcohol.length, 2);
-    expect(
-      alcohol.map((i) => i.name).join(' | ').toLowerCase(),
-      allOf(contains('wódka'), contains('piwo')),
-    );
-    for (final a in alcohol) {
-      expect(a.assignment.mode, AssignMode.drinkers);
-    }
-    expect(alcohol.fold(0, (s, i) => s + i.totalGr), 10872);
-
-    // Mixers tagged but split among everyone.
-    final mixers =
-        r.items.where((i) => i.category == Categories.mixer).toList();
-    expect(mixers.length, greaterThanOrEqualTo(4));
-    for (final m in mixers) {
-      expect(m.assignment.mode, AssignMode.everyone);
-    }
-
-    // Name cleanup: VAT letter stripped, spaces collapsed.
-    expect(r.items.first.name, 'Tonic');
-    // Weight-based quantity with comma decimal.
-    final kielbasa =
-        r.items.firstWhere((i) => i.name.startsWith('KiełbBrocka'));
-    expect(kielbasa.qty, closeTo(0.871, 1e-9));
-    // Discount captured (vodka -28.00).
-    final vodka = r.items.firstWhere((i) => i.name.startsWith('WódkaB'));
-    expect(vodka.discountGr, -2800);
-    expect(vodka.totalGr, 7998);
-  });
-
-  test('accepts bare JPK payload and bare JWS token', () {
-    final res = parseEParagonDetailed(fixture);
-    expect(res.receipt.items, isNotEmpty);
-    // Raw JWS from the wrapper should parse identically. Tolerate whitespace
-    // around the colon: the fixture is minified as the device emits it, but a
-    // pretty-printed payload is equally valid JSON and must not fail here.
-    final match = RegExp(r'"data"\s*:\s*"([^"]+)"').firstMatch(fixture);
-    expect(match, isNotNull, reason: 'fixture must carry a "data" JWS field');
-    final jws = match!.group(1)!;
-    final fromJws = parseEParagon(jws);
-    expect(fromJws.items.length, res.receipt.items.length);
-  });
-
-  test('rejects garbage input with a clear error', () {
-    expect(
-      () => parseEParagon('not json'),
-      throwsA(isA<EParagonParseException>()),
-    );
-    expect(
-      () => parseEParagon('{"foo": 1}'),
-      throwsA(isA<EParagonParseException>()),
-    );
-  });
-}

billsplit/test/helpers.dart

@@ -1,118 +0,0 @@
-import 'dart:io';
-
-import 'package:billsplit/state/app_state.dart';
-import 'package:billsplit/ui/receipt_screen.dart';
-import 'package:file_selector_platform_interface/file_selector_platform_interface.dart';
-import 'package:flutter/material.dart';
-import 'package:flutter/services.dart';
-import 'package:flutter_test/flutter_test.dart';
-import 'package:provider/provider.dart';
-
-const _pathChannel = MethodChannel('plugins.flutter.io/path_provider');
-
-/// Fake [FileSelectorPlatform] driving open/save dialogs in tests.
-///
-/// file_selector is swapped at the platform-interface level rather than at the
-/// method channel: the real implementation talks Pigeon, so a MethodChannel
-/// mock would not intercept it.
-class _FakeFileSelector extends FileSelectorPlatform {
-  _FakeFileSelector({
-    this.pickResult,
-    this.pickName,
-    this.saveResult,
-    this.saveThrows = false,
-  });
-
-  final Uint8List? pickResult;
-  final String? pickName;
-  final String? saveResult;
-  final bool saveThrows;
-
-  @override
-  Future<XFile?> openFile({
-    List<XTypeGroup>? acceptedTypeGroups,
-    String? initialDirectory,
-    String? confirmButtonText,
-  }) async {
-    if (pickResult == null) return null;
-    return XFile.fromData(pickResult!, name: pickName ?? 'picked.json');
-  }
-
-  @override
-  Future<FileSaveLocation?> getSaveLocation({
-    List<XTypeGroup>? acceptedTypeGroups,
-    SaveDialogOptions options = const SaveDialogOptions(),
-  }) async {
-    if (saveThrows) {
-      throw PlatformException(code: 'boom', message: 'disk full');
-    }
-    if (saveResult == null) return null;
-    return FileSaveLocation(saveResult!);
-  }
-}
-
-/// Installs a fake file_selector platform for the current test.
-///
-/// `pickResult`: bytes returned by openFile (null → user cancelled).
-/// `saveResult`: path returned by getSaveLocation (null → user cancelled).
-/// `saveThrows`: getSaveLocation raises a PlatformException.
-void mockFilePicker({
-  Uint8List? pickResult,
-  String? pickName,
-  String? saveResult,
-  bool saveThrows = false,
-}) {
-  TestWidgetsFlutterBinding.ensureInitialized();
-  FileSelectorPlatform.instance = _FakeFileSelector(
-    pickResult: pickResult,
-    pickName: pickName,
-    saveResult: saveResult,
-    saveThrows: saveThrows,
-  );
-  // Record the write instead of touching the disk: a real dart:io future never
-  // completes inside testWidgets' fake-async zone, so the export flow would
-  // stall before showing its snackbar.
-  exportedFiles.clear();
-  debugSetExportWriter((path, bytes, mimeType) async {
-    exportedFiles[path] = bytes;
-  });
-}
-
-/// Paths and payloads captured by the stub export writer.
-final Map<String, Uint8List> exportedFiles = <String, Uint8List>{};
-
-/// Points path_provider's documents directory at [dir].
-void mockPathProvider(Directory dir) {
-  TestWidgetsFlutterBinding.ensureInitialized();
-  TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger
-      .setMockMethodCallHandler(_pathChannel, (call) async => dir.path);
-}
-
-/// Clears the path_provider channel mock and the file_selector fake.
-void clearChannelMocks() {
-  TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger
-      .setMockMethodCallHandler(_pathChannel, null);
-  FileSelectorPlatform.instance = _FakeFileSelector();
-  debugSetExportWriter(null);
-}
-
-/// Creates an [AppState] persisted under a fresh temp directory.
-AppState tempState() {
-  final dir = Directory.systemTemp.createTempSync('billsplit_ui');
-  addTearDown(() => dir.deleteSync(recursive: true));
-  return AppState(overrideDir: dir)..loaded = true;
-}
-
-/// Pumps [home] inside the app shell with [state] provided.
-Future<void> pumpApp(WidgetTester tester, AppState state, Widget home) {
-  return tester.pumpWidget(
-    ChangeNotifierProvider.value(
-      value: state,
-      child: MaterialApp(home: home),
-    ),
-  );
-}
-
-/// Fires the debounced save timer so tests end with no pending timers.
-Future<void> flushSaves(WidgetTester tester) =>
-    tester.pump(const Duration(milliseconds: 450));

billsplit/test/models_test.dart

@@ -1,78 +0,0 @@
-import 'dart:convert';
-
-import 'package:billsplit/domain/models.dart';
-import 'package:flutter_test/flutter_test.dart';
-
-void main() {
-  test('formatPln handles zero, cents padding and negatives', () {
-    expect(formatPln(0), '0,00 zł');
-    expect(formatPln(5), '0,05 zł');
-    expect(formatPln(123456), '1234,56 zł');
-    expect(formatPln(-7), '-0,07 zł');
-  });
-
-  test('Ids are unique and ordered enough', () {
-    final a = Ids.next();
-    final b = Ids.next();
-    expect(a, isNot(b));
-  });
-
-  test('Person/Group/Assignment/Item/Receipt JSON roundtrips', () {
-    final p = Person(id: 'p1', name: 'Ala', drinks: false);
-    expect(Person.fromJson(p.toJson()).drinks, isFalse);
-
-    final g = Group(id: 'g1', name: 'Meat', memberIds: {'p1'});
-    expect(Group.fromJson(g.toJson()).memberIds, {'p1'});
-
-    final a = Assignment(mode: AssignMode.group, groupId: 'g1');
-    final a2 = Assignment.fromJson(a.toJson());
-    expect(a2.mode, AssignMode.group);
-    expect(a2.groupId, 'g1');
-
-    final i = Item(
-      id: 'i1',
-      name: 'Piwo',
-      totalGr: 500,
-      qty: 2,
-      unitPriceGr: 250,
-      discountGr: -100,
-      category: Categories.alcohol,
-      assignment: Assignment(mode: AssignMode.custom, customIds: {'p1'}),
-    );
-    final i2 = Item.fromJson(
-      jsonDecode(jsonEncode(i.toJson())) as Map<String, dynamic>,
-    );
-    expect(i2.assignment.customIds, {'p1'});
-    expect(i2.discountGr, -100);
-
-    final r = Receipt(
-      id: 'r1',
-      title: 't',
-      store: 's',
-      items: [i],
-      participantIds: {'p1'},
-      paidTotalGr: 500,
-    );
-    final r2 = Receipt.fromJson(
-      jsonDecode(jsonEncode(r.toJson())) as Map<String, dynamic>,
-    );
-    expect(r2.itemsTotalGr, 500);
-    expect(r2.participantIds, {'p1'});
-    expect(r2.store, 's');
-  });
-
-  test('fromJson tolerates missing optional fields', () {
-    final p = Person.fromJson(const {'id': 'x', 'name': 'n'});
-    expect(p.drinks, isTrue);
-    final g = Group.fromJson(const {'id': 'x', 'name': 'n'});
-    expect(g.memberIds, isEmpty);
-    final a = Assignment.fromJson(const {});
-    expect(a.mode, AssignMode.everyone);
-    final i = Item.fromJson(const {'id': 'x', 'name': 'n', 'totalGr': 1});
-    expect(i.qty, 1);
-    expect(i.category, Categories.general);
-    final r = Receipt.fromJson(const {'id': 'x', 'title': 't', 'date': 'bad'});
-    expect(r.items, isEmpty);
-    expect(r.paidTotalGr, isNull);
-  });
-}

billsplit/test/people_flows_test.dart

@@ -1,154 +0,0 @@
-// People screen flows.
-
-import 'package:billsplit/domain/models.dart';
-import 'package:billsplit/state/app_state.dart';
-import 'package:billsplit/ui/people_screen.dart';
-import 'package:flutter/material.dart';
-import 'package:flutter_test/flutter_test.dart';
-
-import 'helpers.dart';
-
-Receipt demoReceipt(AppState s, {bool withUnassigned = false}) {
-  final r = Receipt(
-    id: 'r1',
-    title: 'Demo',
-    store: 'Biedronka',
-    paidTotalGr: 1000,
-    items: [
-      Item(id: 'i1', name: 'Bread', totalGr: 500),
-      Item(
-        id: 'i2',
-        name: 'Beer',
-        totalGr: 300,
-        category: Categories.alcohol,
-        assignment: Assignment(mode: AssignMode.drinkers),
-      ),
-      Item(
-        id: 'i3',
-        name: 'Tonic',
-        totalGr: 100,
-        category: Categories.mixer,
-      ),
-      Item(
-        id: 'i4',
-        name: 'Kaucja',
-        totalGr: 100,
-        category: Categories.deposit,
-      ),
-      if (withUnassigned)
-        Item(
-          id: 'i5',
-          name: 'Ghost',
-          totalGr: 50,
-          assignment: Assignment(mode: AssignMode.custom),
-        ),
-    ],
-  );
-  s.addReceipt(r);
-  return r;
-}
-
-void main() {
-  TestWidgetsFlutterBinding.ensureInitialized();
-
-  group('people', () {
-    testWidgets('add person dialog: toggle, cancel, empty, valid',
-        (tester) async {
-      final s = tempState();
-      await pumpApp(tester, s, const PeopleScreen());
-      expect(find.textContaining('Nobody yet'), findsOneWidget);
-
-      await tester.tap(find.text('Add person'));
-      await tester.pumpAndSettle();
-      await tester.tap(find.byType(Switch));
-      await tester.pumpAndSettle();
-      await tester.tap(find.text('Cancel'));
-      await tester.pumpAndSettle();
-      expect(s.people, isEmpty);
-
-      await tester.tap(find.text('Add person'));
-      await tester.pumpAndSettle();
-      await tester.tap(find.text('Add'));
-      await tester.pumpAndSettle();
-      expect(s.people, isEmpty);
-
-      await tester.tap(find.text('Add person'));
-      await tester.pumpAndSettle();
-      await tester.enterText(find.byType(TextField), 'Kasia');
-      await tester.tap(find.byType(Switch));
-      await tester.pumpAndSettle();
-      await tester.tap(find.text('Add'));
-      await tester.pumpAndSettle();
-      expect(s.people.single.name, 'Kasia');
-      expect(s.people.single.drinks, isFalse);
-      await flushSaves(tester);
-    });
-
-    testWidgets('drinks switch, membership early-return, delete flows',
-        (tester) async {
-      final s = tempState();
-      final p = s.addPerson('Ala');
-      await pumpApp(tester, s, const PeopleScreen());
-      await flushSaves(tester);
-
-      await tester.tap(find.byType(Switch).first);
-      await tester.pumpAndSettle();
-      expect(p.drinks, isFalse);
-
-      // No groups yet → tapping the person is a no-op branch.
-      await tester.tap(find.text('Ala'));
-      await tester.pumpAndSettle();
-      expect(find.text('Group membership'), findsNothing);
-
-      await tester.tap(find.byIcon(Icons.delete_outline).first);
-      await tester.pumpAndSettle();
-      await tester.tap(find.text('Cancel'));
-      await tester.pumpAndSettle();
-      expect(s.people, hasLength(1));
-
-      await tester.tap(find.byIcon(Icons.delete_outline).first);
-      await tester.pumpAndSettle();
-      await tester.tap(find.text('Remove'));
-      await tester.pumpAndSettle();
-      expect(s.people, isEmpty);
-      await flushSaves(tester);
-    });
-
-    testWidgets('groups: add, membership sheet, delete', (tester) async {
-      final s = tempState()..addPerson('Ala');
-      await pumpApp(tester, s, const PeopleScreen());
-      await flushSaves(tester);
-
-      await tester.tap(find.text('Add group'));
-      await tester.pumpAndSettle();
-      await tester.tap(find.text('Cancel'));
-      await tester.pumpAndSettle();
-      expect(s.groups, isEmpty);
-
-      await tester.tap(find.text('Add group'));
-      await tester.pumpAndSettle();
-      await tester.enterText(find.byType(TextField), 'Meat');
-      await tester.tap(find.text('Add'));
-      await tester.pumpAndSettle();
-      expect(s.groups.single.name, 'Meat');
-      expect(find.textContaining('No members'), findsOneWidget);
-
-      await tester.tap(find.text('Ala'));
-      await tester.pumpAndSettle();
-      expect(find.byType(CheckboxListTile), findsOneWidget);
-      await tester.tap(find.byType(CheckboxListTile));
-      await tester.pumpAndSettle();
-      expect(s.groups.single.memberIds, hasLength(1));
-      await tester.tap(find.byType(CheckboxListTile));
-      await tester.pumpAndSettle();
-      expect(s.groups.single.memberIds, isEmpty);
-      await tester.tapAt(const Offset(10, 10)); // close sheet
-      await tester.pumpAndSettle();
-
-      await tester.tap(find.byIcon(Icons.delete_outline).last);
-      await tester.pumpAndSettle();
-      expect(s.groups, isEmpty);
-      await flushSaves(tester);
-    });
-  });
-}

billsplit/test/receipt_flows_test.dart

@@ -1,140 +0,0 @@
-// Receipt screen flows.
-
-import 'package:billsplit/domain/models.dart';
-import 'package:billsplit/state/app_state.dart';
-import 'package:billsplit/ui/receipt_screen.dart';
-import 'package:flutter/material.dart';
-import 'package:flutter_test/flutter_test.dart';
-
-import 'helpers.dart';
-
-Receipt demoReceipt(AppState s, {bool withUnassigned = false}) {
-  final r = Receipt(
-    id: 'r1',
-    title: 'Demo',
-    store: 'Biedronka',
-    paidTotalGr: 1000,
-    items: [
-      Item(id: 'i1', name: 'Bread', totalGr: 500),
-      Item(
-        id: 'i2',
-        name: 'Beer',
-        totalGr: 300,
-        category: Categories.alcohol,
-        assignment: Assignment(mode: AssignMode.drinkers),
-      ),
-      Item(
-        id: 'i3',
-        name: 'Tonic',
-        totalGr: 100,
-        category: Categories.mixer,
-      ),
-      Item(
-        id: 'i4',
-        name: 'Kaucja',
-        totalGr: 100,
-        category: Categories.deposit,
-      ),
-      if (withUnassigned)
-        Item(
-          id: 'i5',
-          name: 'Ghost',
-          totalGr: 50,
-          assignment: Assignment(mode: AssignMode.custom),
-        ),
-    ],
-  );
-  s.addReceipt(r);
-  return r;
-}
-
-void main() {
-  TestWidgetsFlutterBinding.ensureInitialized();
-
-  group('receipt screen', () {
-    testWidgets('unknown id shows deleted note', (tester) async {
-      final s = tempState();
-      await pumpApp(tester, s, const ReceiptScreen(receiptId: 'nope'));
-      expect(find.text('Receipt deleted.'), findsOneWidget);
-    });
-
-    testWidgets('tabs on narrow, panes on wide', (tester) async {
-      final s = tempState()..addPerson('Ala');
-      demoReceipt(s);
-      await pumpApp(tester, s, const ReceiptScreen(receiptId: 'r1'));
-      await flushSaves(tester);
-      expect(find.byType(TabBar), findsOneWidget);
-      await tester.tap(find.text('Totals'));
-      await tester.pumpAndSettle();
-      expect(find.textContaining('grosz-exact'), findsOneWidget);
-
-      tester.view.physicalSize = const Size(1600, 900);
-      tester.view.devicePixelRatio = 1;
-      addTearDown(tester.view.reset);
-      await tester.pumpAndSettle();
-      expect(find.byType(TabBar), findsNothing);
-      expect(find.byType(VerticalDivider), findsOneWidget);
-    });
-
-    testWidgets('participants: empty roster snackbar, then editing',
-        (tester) async {
-      final s = tempState();
-      demoReceipt(s);
-      await pumpApp(tester, s, const ReceiptScreen(receiptId: 'r1'));
-      await flushSaves(tester);
-      await tester.tap(find.byIcon(Icons.group));
-      await tester.pumpAndSettle();
-      expect(find.textContaining('Add people first'), findsOneWidget);
-
-      final p = s.addPerson('Ala');
-      s.addPerson('Bob');
-      await tester.pumpAndSettle();
-      await tester.tap(find.byIcon(Icons.group));
-      await tester.pumpAndSettle();
-      expect(find.text('Who is on this receipt?'), findsOneWidget);
-      await tester.tap(find.byType(CheckboxListTile).first);
-      await tester.pumpAndSettle();
-      expect(s.receipts.single.participantIds.contains(p.id), isTrue);
-      await tester.tap(find.byType(CheckboxListTile).first);
-      await tester.pumpAndSettle();
-      await tester.tapAt(const Offset(10, 10));
-      await tester.pumpAndSettle();
-      await flushSaves(tester);
-    });
-
-    testWidgets('export: no participants, success, cancel, failure',
-        (tester) async {
-      final s = tempState();
-      demoReceipt(s);
-      await pumpApp(tester, s, const ReceiptScreen(receiptId: 'r1'));
-      await flushSaves(tester);
-
-      await tester.tap(find.byIcon(Icons.table_view));
-      await tester.pumpAndSettle();
-      expect(find.textContaining('Add participants'), findsOneWidget);
-
-      s.addPerson('Ala');
-      s.receipts.single.participantIds.addAll(s.people.map((p) => p.id));
-      mockFilePicker(saveResult: '/tmp/out.xlsx');
-      await tester.pump(const Duration(seconds: 5)); // expire prior snackbar
-      await tester.pumpAndSettle();
-      await tester.tap(find.byIcon(Icons.table_view));
-      await tester.pumpAndSettle();
-      expect(find.textContaining('Saved: out.xlsx'), findsOneWidget);
-
-      mockFilePicker();
-      await tester.pump(const Duration(seconds: 5));
-      await tester.pumpAndSettle();
-      await tester.tap(find.byIcon(Icons.table_view));
-      await tester.pumpAndSettle();
-
-      mockFilePicker(saveThrows: true);
-      await tester.pump(const Duration(seconds: 5));
-      await tester.pumpAndSettle();
-      await tester.tap(find.byIcon(Icons.table_view));
-      await tester.pumpAndSettle();
-      expect(find.textContaining('Export failed'), findsOneWidget);
-      await flushSaves(tester);
-    });
-  });
-}

billsplit/test/receipt_items_test.dart

@@ -1,195 +0,0 @@
-// Receipt item list and assignment sheet flows.
-
-// Receipt screen flows.
-
-import 'package:billsplit/domain/models.dart';
-import 'package:billsplit/state/app_state.dart';
-import 'package:billsplit/ui/receipt_screen.dart';
-import 'package:flutter/material.dart';
-import 'package:flutter_test/flutter_test.dart';
-
-import 'helpers.dart';
-
-Receipt demoReceipt(AppState s, {bool withUnassigned = false}) {
-  final r = Receipt(
-    id: 'r1',
-    title: 'Demo',
-    store: 'Biedronka',
-    paidTotalGr: 1000,
-    items: [
-      Item(id: 'i1', name: 'Bread', totalGr: 500),
-      Item(
-        id: 'i2',
-        name: 'Beer',
-        totalGr: 300,
-        category: Categories.alcohol,
-        assignment: Assignment(mode: AssignMode.drinkers),
-      ),
-      Item(
-        id: 'i3',
-        name: 'Tonic',
-        totalGr: 100,
-        category: Categories.mixer,
-      ),
-      Item(
-        id: 'i4',
-        name: 'Kaucja',
-        totalGr: 100,
-        category: Categories.deposit,
-      ),
-      if (withUnassigned)
-        Item(
-          id: 'i5',
-          name: 'Ghost',
-          totalGr: 50,
-          assignment: Assignment(mode: AssignMode.custom),
-        ),
-    ],
-  );
-  s.addReceipt(r);
-  return r;
-}
-
-void main() {
-  TestWidgetsFlutterBinding.ensureInitialized();
-
-  group('receipt items', () {
-    testWidgets('items list: labels, unassigned, edit dialog paths',
-        (tester) async {
-      final s = tempState();
-      final p = s.addPerson('Ala');
-      s.addPerson('Bob', drinks: false);
-      final g = s.addGroup('Meat')..memberIds.add(p.id);
-      final r = demoReceipt(s, withUnassigned: true);
-      r.items[0].assignment = Assignment(mode: AssignMode.group, groupId: g.id);
-      r.items[2].assignment = Assignment(mode: AssignMode.nonDrinkers);
-      r.items[3].assignment = Assignment(
-        mode: AssignMode.group,
-        groupId: 'gone',
-      );
-      await pumpApp(tester, s, const ReceiptScreen(receiptId: 'r1'));
-      await flushSaves(tester);
-
-      expect(find.textContaining('Group: Meat'), findsOneWidget);
-      expect(find.textContaining('Group: ?'), findsOneWidget);
-      expect(find.textContaining('Drinkers'), findsOneWidget);
-      expect(find.textContaining('Non-drinkers'), findsOneWidget);
-      expect(find.textContaining('UNASSIGNED'), findsOneWidget);
-
-      await tester.tap(find.text('Totals'));
-      await tester.pumpAndSettle();
-      expect(find.textContaining('excluded from totals'), findsOneWidget);
-      await tester.tap(find.text('Items'));
-      await tester.pumpAndSettle();
-
-      // Edit via long-press: invalid total keeps dialog open, then fix+save.
-      await tester.longPress(find.text('Bread'));
-      await tester.pumpAndSettle();
-      await tester.enterText(
-        find.widgetWithText(TextField, 'Total (zł)'),
-        'abc',
-      );
-      await tester.tap(find.text('Save'));
-      await tester.pumpAndSettle();
-      expect(find.text('Save'), findsOneWidget); // still open
-      await tester.enterText(
-        find.widgetWithText(TextField, 'Total (zł)'),
-        '6,00',
-      );
-      await tester.enterText(find.widgetWithText(TextField, 'Name'), 'Rolls');
-      await tester.tap(find.text('Save'));
-      await tester.pumpAndSettle();
-      expect(r.items[0].totalGr, 600);
-      expect(r.items[0].name, 'Rolls');
-
-      // Delete an item from the edit dialog.
-      await tester.longPress(find.text('Ghost'));
-      await tester.pumpAndSettle();
-      await tester.tap(find.text('Delete'));
-      await tester.pumpAndSettle();
-      expect(r.items.any((i) => i.name == 'Ghost'), isFalse);
-
-      // Add a new alcohol item via the FAB: cancel first, then create.
-      await tester.tap(find.byType(FloatingActionButton));
-      await tester.pumpAndSettle();
-      await tester.tap(find.text('Cancel'));
-      await tester.pumpAndSettle();
-
-      await tester.tap(find.byType(FloatingActionButton));
-      await tester.pumpAndSettle();
-      await tester.enterText(find.widgetWithText(TextField, 'Name'), 'Wine');
-      await tester.enterText(
-        find.widgetWithText(TextField, 'Total (zł)'),
-        '30',
-      );
-      await tester.tap(find.byType(DropdownButtonFormField<String>));
-      await tester.pumpAndSettle();
-      await tester.tap(find.text('Alcohol').last);
-      await tester.pumpAndSettle();
-      await tester.tap(find.text('Save'));
-      await tester.pumpAndSettle();
-      final wine = r.items.singleWhere((i) => i.name == 'Wine');
-      expect(wine.totalGr, 3000);
-      expect(wine.assignment.mode, AssignMode.drinkers);
-
-      await tester.tap(find.byType(FloatingActionButton));
-      await tester.pumpAndSettle();
-      await tester.enterText(find.widgetWithText(TextField, 'Name'), 'Chips');
-      await tester.enterText(
-        find.widgetWithText(TextField, 'Total (zł)'),
-        '5',
-      );
-      await tester.tap(find.text('Save'));
-      await tester.pumpAndSettle();
-      expect(
-        r.items.singleWhere((i) => i.name == 'Chips').assignment.mode,
-        AssignMode.everyone,
-      );
-      await flushSaves(tester);
-    });
-
-    testWidgets('assignment sheet: modes, materialization, nobody',
-        (tester) async {
-      final s = tempState();
-      final ala = s.addPerson('Ala');
-      s.addPerson('Bob');
-      final g = s.addGroup('Meat')..memberIds.add(ala.id);
-      final r = demoReceipt(s);
-      await pumpApp(tester, s, const ReceiptScreen(receiptId: 'r1'));
-      await flushSaves(tester);
-
-      await tester.tap(find.text('Bread'));
-      await tester.pumpAndSettle();
-      final item = r.items[0];
-
-      await tester.tap(find.widgetWithText(ChoiceChip, 'Drinkers'));
-      await tester.pumpAndSettle();
-      expect(item.assignment.mode, AssignMode.drinkers);
-      await tester.tap(find.widgetWithText(ChoiceChip, 'Non-drinkers'));
-      await tester.pumpAndSettle();
-      expect(item.assignment.mode, AssignMode.nonDrinkers);
-      expect(find.textContaining('Nobody selected'), findsOneWidget);
-      await tester.tap(find.widgetWithText(ChoiceChip, 'Meat'));
-      await tester.pumpAndSettle();
-      expect(item.assignment.mode, AssignMode.group);
-      expect(item.assignment.groupId, g.id);
-      await tester.tap(find.widgetWithText(ChoiceChip, 'Everyone'));
-      await tester.pumpAndSettle();
-      expect(item.assignment.mode, AssignMode.everyone);
-
-      // Toggling a person on a symbolic mode materializes to custom.
-      await tester.tap(find.byType(CheckboxListTile).first);
-      await tester.pumpAndSettle();
-      expect(item.assignment.mode, AssignMode.custom);
-      expect(item.assignment.customIds, hasLength(1));
-      await tester.tap(find.byType(CheckboxListTile).last);
-      await tester.pumpAndSettle();
-      expect(item.assignment.customIds, isEmpty);
-      expect(find.textContaining('Nobody selected'), findsOneWidget);
-      await tester.tap(find.byType(CheckboxListTile).first);
-      await tester.pumpAndSettle();
-      expect(item.assignment.customIds, hasLength(1));
-      await flushSaves(tester);
-    });
-  });
-}

billsplit/test/split_engine_test.dart

@@ -1,189 +0,0 @@
-import 'dart:io';
-import 'dart:math';
-
-import 'package:billsplit/domain/eparagon_parser.dart';
-import 'package:billsplit/domain/models.dart';
-import 'package:billsplit/domain/split_engine.dart';
-import 'package:flutter_test/flutter_test.dart';
-
-List<Person> makePeople(int n, {Set<int> nonDrinkers = const {}}) => [
-      for (var i = 0; i < n; i++)
-        Person(id: 'p$i', name: 'P$i', drinks: !nonDrinkers.contains(i)),
-    ];
-
-void main() {
-  test('splitAmount: exact sum, deterministic, rotation moves the extra', () {
-    final shares = splitAmount(100, ['b', 'a', 'c']); // rotation 0
-    expect(shares.values.reduce((a, b) => a + b), 100);
-    expect(shares['a'], 34); // sorted order, start at index 0
-    expect(shares['b'], 33);
-    expect(shares['c'], 33);
-    final rotated = splitAmount(100, ['b', 'a', 'c'], rotation: 1);
-    expect(rotated.values.reduce((a, b) => a + b), 100);
-    expect(rotated['b'], 34); // start shifted by one
-    // Same inputs -> same output (deterministic).
-    expect(splitAmount(100, ['b', 'a', 'c'], rotation: 1), rotated);
-  });
-
-  test('splitAmount: negative totals (returns) also sum exactly', () {
-    final shares = splitAmount(-100, ['a', 'b', 'c']);
-    expect(shares.values.reduce((a, b) => a + b), -100);
-    expect(shares.values.every((v) => v == -33 || v == -34), isTrue);
-  });
-
-  test('splitAmount fuzz: sum invariant over random cases', () {
-    final rnd = Random(42);
-    for (var i = 0; i < 500; i++) {
-      final n = 1 + rnd.nextInt(9);
-      final total = rnd.nextInt(100000) - 5000;
-      final ids = List.generate(n, (j) => 'p$j');
-      final shares = splitAmount(total, ids, rotation: rnd.nextInt(1000));
-      expect(
-        shares.values.fold(0, (a, b) => a + b),
-        total,
-        reason: 'total=$total n=$n',
-      );
-      final values = shares.values.toList();
-      expect(
-        values.reduce(max) - values.reduce(min),
-        lessThanOrEqualTo(1),
-        reason: 'shares differ by more than 1 grosz',
-      );
-    }
-  });
-
-  test('modes resolve correctly and intersect with receipt participants', () {
-    final people = makePeople(4, nonDrinkers: {3});
-    final group = Group(id: 'g1', name: 'Meat', memberIds: {'p0', 'p2'});
-    final receipt = Receipt(
-      id: 'r',
-      title: 't',
-      participantIds: {'p0', 'p1', 'p3'}, // p2 not on this receipt
-    );
-    Item mk(Assignment a) =>
-        Item(id: Ids.next(), name: 'x', totalGr: 300, assignment: a);
-
-    expect(
-      resolveParticipants(mk(Assignment()), receipt, people, [group])
-          .map((p) => p.id),
-      ['p0', 'p1', 'p3'],
-    );
-    expect(
-      resolveParticipants(
-        mk(Assignment(mode: AssignMode.drinkers)),
-        receipt,
-        people,
-        [group],
-      ).map((p) => p.id),
-      ['p0', 'p1'],
-    );
-    expect(
-      resolveParticipants(
-        mk(Assignment(mode: AssignMode.nonDrinkers)),
-        receipt,
-        people,
-        [group],
-      ).map((p) => p.id),
-      ['p3'],
-    );
-    // Group intersected with receipt pool: p2 excluded.
-    expect(
-      resolveParticipants(
-        mk(Assignment(mode: AssignMode.group, groupId: 'g1')),
-        receipt,
-        people,
-        [group],
-      ).map((p) => p.id),
-      ['p0'],
-    );
-    expect(
-      resolveParticipants(
-        mk(Assignment(mode: AssignMode.custom, customIds: {'p1', 'p2'})),
-        receipt,
-        people,
-        [group],
-      ).map((p) => p.id),
-      ['p1'],
-    );
-    // Missing group -> unassigned.
-    expect(
-      resolveParticipants(
-        mk(Assignment(mode: AssignMode.group, groupId: 'gone')),
-        receipt,
-        people,
-        [group],
-      ),
-      isEmpty,
-    );
-  });
-
-  test('real receipt: 8 people, all drinkers — reconciles to 597.55', () {
-    final receipt = parseEParagon(
-      File('test/fixtures/sample_receipt.json').readAsStringSync(),
-    );
-    final people = makePeople(8);
-    receipt.participantIds.addAll(people.map((p) => p.id));
-
-    final split = computeSplit(receipt, people, []);
-    expect(split.unassigned, isEmpty);
-    // Exact reconciliation is the hard invariant.
-    expect(split.assignedTotalGr, 59755);
-    // 59755 / 8 = 7469.375 -> everyone lands within a few grosze of that;
-    // remainder rotation spreads the extras instead of stacking them on the
-    // alphabetically-first person.
-    final totals = split.perPerson.values.map((t) => t.totalGr).toList();
-    for (final t in totals) {
-      expect(t, inInclusiveRange(7469 - 15, 7470 + 15));
-    }
-    // Alcohol: 79.98 + 28.74 = 108.72 split over 8 -> 13.59 each ±2 gr.
-    final alcohol = split.perPerson.values.map((t) => t.alcoholGr).toList();
-    expect(alcohol.fold(0, (a, b) => a + b), 10872);
-    for (final a in alcohol) {
-      expect(a, inInclusiveRange(1357, 1361));
-    }
-  });
-
-  test('real receipt: 2 non-drinkers pay no alcohol, totals still exact', () {
-    final receipt = parseEParagon(
-      File('test/fixtures/sample_receipt.json').readAsStringSync(),
-    );
-    final people = makePeople(8, nonDrinkers: {6, 7});
-    receipt.participantIds.addAll(people.map((p) => p.id));
-
-    final split = computeSplit(receipt, people, []);
-    expect(split.assignedTotalGr, 59755);
-    expect(split.perPerson['p6']!.alcoholGr, 0);
-    expect(split.perPerson['p7']!.alcoholGr, 0);
-    // 10872 over 6 drinkers = 1812 each ±2 gr, summing exactly.
-    final drinkerAlcohol = [
-      for (var i = 0; i < 6; i++) split.perPerson['p$i']!.alcoholGr,
-    ];
-    expect(drinkerAlcohol.fold(0, (a, b) => a + b), 10872);
-    for (final a in drinkerAlcohol) {
-      expect(a, inInclusiveRange(1810, 1814));
-    }
-    // Non-drinkers pay strictly less.
-    expect(
-      split.perPerson['p7']!.totalGr,
-      lessThan(split.perPerson['p0']!.totalGr),
-    );
-  });
-
-  test('items with no possible participants are reported, not lost', () {
-    final people = makePeople(2); // both drinkers
-    final receipt = Receipt(id: 'r', title: 't', participantIds: {'p0', 'p1'});
-    receipt.items.add(
-      Item(
-        id: 'i1',
-        name: 'water',
-        totalGr: 500,
-        assignment: Assignment(mode: AssignMode.nonDrinkers),
-      ),
-    );
-    receipt.items.add(Item(id: 'i2', name: 'bread', totalGr: 300));
-
-    final split = computeSplit(receipt, people, []);
-    expect(split.unassigned.map((i) => i.id), ['i1']);
-    expect(split.assignedTotalGr, 300);
-  });
-}

billsplit/test/ui_flows_test.dart

@@ -1,210 +0,0 @@
-import 'dart:convert';
-import 'dart:io';
-import 'dart:typed_data';
-
-import 'package:billsplit/domain/models.dart';
-import 'package:billsplit/main.dart' as app;
-import 'package:billsplit/state/app_state.dart';
-import 'package:billsplit/ui/home_screen.dart';
-import 'package:billsplit/ui/people_screen.dart';
-import 'package:billsplit/ui/receipt_screen.dart';
-import 'package:flutter/material.dart';
-import 'package:flutter_test/flutter_test.dart';
-
-import 'helpers.dart';
-
-Receipt demoReceipt(AppState s, {bool withUnassigned = false}) {
-  final r = Receipt(
-    id: 'r1',
-    title: 'Demo',
-    store: 'Biedronka',
-    paidTotalGr: 1000,
-    items: [
-      Item(id: 'i1', name: 'Bread', totalGr: 500),
-      Item(
-        id: 'i2',
-        name: 'Beer',
-        totalGr: 300,
-        category: Categories.alcohol,
-        assignment: Assignment(mode: AssignMode.drinkers),
-      ),
-      Item(
-        id: 'i3',
-        name: 'Tonic',
-        totalGr: 100,
-        category: Categories.mixer,
-      ),
-      Item(
-        id: 'i4',
-        name: 'Kaucja',
-        totalGr: 100,
-        category: Categories.deposit,
-      ),
-      if (withUnassigned)
-        Item(
-          id: 'i5',
-          name: 'Ghost',
-          totalGr: 50,
-          assignment: Assignment(mode: AssignMode.custom),
-        ),
-    ],
-  );
-  s.addReceipt(r);
-  return r;
-}
-
-void main() {
-  tearDown(clearChannelMocks);
-
-  group('main()', () {
-    testWidgets('boots with the real load path', (tester) async {
-      final dir = Directory.systemTemp.createTempSync('billsplit_main');
-      addTearDown(() => dir.deleteSync(recursive: true));
-      mockPathProvider(dir);
-      app.main();
-      await tester.pump();
-      await tester.pump();
-      expect(find.text('BillSplit'), findsOneWidget);
-    });
-  });
-
-  group('home', () {
-    testWidgets('import cancel does nothing', (tester) async {
-      mockFilePicker();
-      final s = tempState();
-      await pumpApp(tester, s, const HomeScreen());
-      await tester.tap(find.text('Import e-paragon'));
-      await tester.pumpAndSettle();
-      expect(s.receipts, isEmpty);
-    });
-
-    testWidgets('import parse error shows message', (tester) async {
-      mockFilePicker(pickResult: Uint8List.fromList('zzz'.codeUnits));
-      final s = tempState();
-      await pumpApp(tester, s, const HomeScreen());
-      await tester.tap(find.text('Import e-paragon'));
-      await tester.pumpAndSettle();
-      expect(find.textContaining('neither valid JSON'), findsOneWidget);
-      await flushSaves(tester);
-    });
-
-    testWidgets('import invalid UTF-8 hits the generic handler',
-        (tester) async {
-      mockFilePicker(pickResult: Uint8List.fromList([0xFF, 0xFE, 0x00]));
-      final s = tempState();
-      await pumpApp(tester, s, const HomeScreen());
-      await tester.tap(find.text('Import e-paragon'));
-      await tester.pumpAndSettle();
-      expect(find.textContaining('Import failed'), findsOneWidget);
-    });
-
-    testWidgets('import success navigates; warning shows a snackbar',
-        (tester) async {
-      final fixture =
-          File('test/fixtures/sample_receipt.json').readAsBytesSync();
-      mockFilePicker(pickResult: fixture);
-      final s = tempState()..addPerson('Ala');
-      await pumpApp(tester, s, const HomeScreen());
-      await tester.tap(find.text('Import e-paragon'));
-      await tester.pumpAndSettle();
-      expect(s.receipts, hasLength(1));
-      expect(find.byType(ReceiptScreen), findsOneWidget);
-      await flushSaves(tester);
-    });
-
-    testWidgets('import surfaces parser warnings', (tester) async {
-      final payload = {
-        'dokument': {
-          'paragon': {
-            'pozycja': [
-              {
-                'towar': {'nazwa': 'Chleb', 'ilosc': 1, 'brutto': 500},
-              },
-            ],
-            'podsum': {'sumaBrutto': 999},
-          },
-        },
-      };
-      final body = base64Url.encode(utf8.encode(jsonEncode(payload)));
-      final wrapper = jsonEncode({'data': 'h.$body.s'});
-      mockFilePicker(pickResult: Uint8List.fromList(utf8.encode(wrapper)));
-      final s = tempState();
-      await pumpApp(tester, s, const HomeScreen());
-      await tester.tap(find.text('Import e-paragon'));
-      await tester.pumpAndSettle();
-      expect(find.textContaining('differs'), findsOneWidget);
-      await flushSaves(tester);
-    });
-
-    testWidgets('manual create: cancel, empty and valid', (tester) async {
-      final s = tempState();
-      await pumpApp(tester, s, const HomeScreen());
-
-      await tester.tap(find.text('New receipt'));
-      await tester.pumpAndSettle();
-      await tester.tap(find.text('Cancel'));
-      await tester.pumpAndSettle();
-      expect(s.receipts, isEmpty);
-
-      await tester.tap(find.text('New receipt'));
-      await tester.pumpAndSettle();
-      await tester.tap(find.text('Create'));
-      await tester.pumpAndSettle();
-      expect(s.receipts, isEmpty);
-
-      await tester.tap(find.text('New receipt'));
-      await tester.pumpAndSettle();
-      await tester.enterText(find.byType(TextField), 'Pizza night');
-      await tester.tap(find.text('Create'));
-      await tester.pumpAndSettle();
-      expect(s.receipts.single.title, 'Pizza night');
-      expect(find.byType(ReceiptScreen), findsOneWidget);
-      await tester.pageBack();
-      await tester.pumpAndSettle();
-
-      await tester.tap(find.text('New receipt'));
-      await tester.pumpAndSettle();
-      await tester.enterText(find.byType(TextField), 'Kebab');
-      await tester.testTextInput.receiveAction(TextInputAction.done);
-      await tester.pumpAndSettle();
-      expect(s.receipts.first.title, 'Kebab');
-      await flushSaves(tester);
-    });
-
-    testWidgets('list tile navigates; dismiss asks and deletes',
-        (tester) async {
-      final s = tempState();
-      demoReceipt(s);
-      await pumpApp(tester, s, const HomeScreen());
-      await flushSaves(tester);
-
-      expect(find.textContaining('4 items'), findsOneWidget);
-      await tester.tap(find.text('Demo'));
-      await tester.pumpAndSettle();
-      expect(find.byType(ReceiptScreen), findsOneWidget);
-      await tester.pageBack();
-      await tester.pumpAndSettle();
-
-      await tester.drag(find.byType(Dismissible), const Offset(-600, 0));
-      await tester.pumpAndSettle();
-      await tester.tap(find.text('Cancel'));
-      await tester.pumpAndSettle();
-      expect(s.receipts, hasLength(1));
-
-      await tester.drag(find.byType(Dismissible), const Offset(-600, 0));
-      await tester.pumpAndSettle();
-      await tester.tap(find.text('Delete'));
-      await tester.pumpAndSettle();
-      expect(s.receipts, isEmpty);
-      await flushSaves(tester);
-    });
-
-    testWidgets('people button opens roster', (tester) async {
-      final s = tempState();
-      await pumpApp(tester, s, const HomeScreen());
-      await tester.tap(find.byIcon(Icons.group));
-      await tester.pumpAndSettle();
-      expect(find.byType(PeopleScreen), findsOneWidget);
-    });
-  });
-}

billsplit/test/widget_test.dart

@@ -1,16 +0,0 @@
-import 'package:billsplit/main.dart';
-import 'package:billsplit/state/app_state.dart';
-import 'package:flutter_test/flutter_test.dart';
-
-void main() {
-  testWidgets('app builds and shows empty state', (tester) async {
-    // Real file IO never completes inside the fake-async test zone, so skip
-    // load() and mark the state ready directly; this is a pure widget smoke
-    // test (persistence is exercised by the domain tests / at runtime).
-    final state = AppState()..loaded = true;
-    await tester.pumpWidget(BillSplitApp(state: state));
-    await tester.pump();
-    expect(find.text('BillSplit'), findsOneWidget);
-    expect(find.textContaining('No receipts yet'), findsOneWidget);
-  });
-}

billsplit/test/xlsx_export_test.dart

@@ -1,31 +0,0 @@
-import 'dart:io';
-
-import 'package:billsplit/domain/eparagon_parser.dart';
-import 'package:billsplit/domain/models.dart';
-import 'package:billsplit/domain/xlsx_export.dart';
-import 'package:flutter_test/flutter_test.dart';
-
-void main() {
-  test('exports a non-trivial xlsx for the real receipt', () {
-    final receipt = parseEParagon(
-      File('test/fixtures/sample_receipt.json').readAsStringSync(),
-    );
-    final people = [
-      for (var i = 0; i < 8; i++)
-        Person(id: 'p$i', name: 'Person ${i + 1}', drinks: i < 6),
-    ];
-    receipt.participantIds.addAll(people.map((p) => p.id));
-
-    final bytes = exportXlsx(receipt: receipt, roster: people, groups: []);
-    expect(bytes.length, greaterThan(4000));
-    // PK zip magic.
-    expect(bytes[0], 0x50);
-    expect(bytes[1], 0x4B);
-
-    // Write out for external validation (recalc via LibreOffice + openpyxl).
-    final out = File('build/test_export.xlsx')
-      ..createSync(recursive: true)
-      ..writeAsBytesSync(bytes);
-    expect(out.existsSync(), isTrue);
-  });
-}

billsplit/test/xlsx_extra_test.dart

@@ -1,56 +0,0 @@
-import 'dart:io';
-import 'dart:typed_data';
-
-import 'package:billsplit/domain/models.dart';
-import 'package:billsplit/domain/xlsx_export.dart';
-import 'package:billsplit/ui/receipt_screen.dart';
-import 'package:flutter_test/flutter_test.dart';
-
-void main() {
-  test('export handles no store/paid, unassigned items and non-drinkers', () {
-    final people = [
-      Person(id: 'a', name: 'Ala'),
-      Person(id: 'b', name: 'Bob', drinks: false),
-    ];
-    final receipt = Receipt(
-      id: 'r',
-      title: 'Manual',
-      participantIds: {'a', 'b'},
-      items: [
-        Item(id: 'i1', name: 'Bread', totalGr: 500),
-        Item(
-          id: 'i2',
-          name: 'Beer',
-          totalGr: 300,
-          category: Categories.alcohol,
-          assignment: Assignment(mode: AssignMode.drinkers),
-        ),
-        Item(
-          id: 'i3',
-          name: 'Ghost',
-          totalGr: 100,
-          assignment: Assignment(mode: AssignMode.custom),
-        ),
-      ],
-    );
-    final bytes = exportXlsx(receipt: receipt, roster: people, groups: []);
-    expect(bytes.length, greaterThan(1000));
-    expect(bytes[0], 0x50);
-  });
-
-  // Exercises the REAL disk writer, deliberately as a plain `test` rather than
-  // a `testWidgets`: a real dart:io future never completes inside the
-  // fake-async zone, which is the whole reason the export flow writes through
-  // an injectable seam.
-  test('the real export writer puts the bytes on disk', () async {
-    final dir = Directory.systemTemp.createTempSync('billsplit_export');
-    addTearDown(() => dir.deleteSync(recursive: true));
-    final target = '${dir.path}/split.xlsx';
-    final payload = Uint8List.fromList([0x50, 0x4B, 0x03, 0x04, 0x99]);
-
-    debugSetExportWriter(null); // restore the real writer
-    await writeExport(target, payload, 'application/vnd.ms-excel');
-
-    expect(File(target).readAsBytesSync(), payload);
-  });
-}

docs/superpowers/contracts/archive-billsplit-2026-08-23.json

@@ -0,0 +1,21 @@
+{
+  "title": "Archive billsplit together with every artifact coupled to it",
+  "objective": "Remove the billsplit Flutter app from testsAndMisc without leaving the repo in a state where a gate fails or a config rule points at a missing path. billsplit is the coupled case the earlier archive commit deliberately deferred: a coverage package, an app_icons registry entry, a CI workflow and two paired binary rules all name it.",
+  "acceptance_criteria": [
+    "billsplit/ and python_pkg/billsplit_coverage/ are both present in kuhyx/testsAndMisc-archive, confirmed via the GitHub API before the local delete.",
+    "Archived commit count equals the monorepo count for those paths (8), and tracked file counts match exactly (73 and 5).",
+    "python_pkg/app_icons/apps.py no longer contains a billsplit AppIcon entry, and the app_icons registry still imports cleanly.",
+    "The repo-wide pytest gate still reports 100% coverage, with the test count reduced by exactly the 19 billsplit_coverage tests and nothing else.",
+    "check_no_binaries.sh exits 0 with a .binary-allowlist that now carries no patterns.",
+    ".gitignore contains no billsplit rule; the ! overrides are removed in the same commit as the allowlist patterns they paired with, so the two halves never disagree.",
+    "No file under .github/workflows/ references billsplit or billsplit_coverage.",
+    "AGENTS.md no longer presents billsplit as a live app, while keeping the both-halves guidance for any future Flutter app.",
+    "pre-commit passes without --no-verify."
+  ],
+  "out_of_scope": [
+    "Removing python_pkg/app_icons itself, which serves eleven other apps.",
+    "Changing how check_no_binaries.sh or the coverage gate work; this commit only removes data they read.",
+    "Historical planning documents that mention billsplit as past work."
+  ],
+  "verifier": "gh api confirms both paths in the archive; git ls-files counts match 73/5; diff -r clean; python3 meta/scripts/pytest_changed_packages.py python_pkg/app_icons/apps.py reports 2095 passed at 100%; ./meta/scripts/check_no_binaries.sh exits 0; ./meta/scripts/check_directory_depth.sh --all drops 451 -> 417; git grep billsplit finds only intentional prose."
+}

docs/superpowers/evidence/archive-billsplit-2026-08-23.json

@@ -0,0 +1,64 @@
+{
+  "intent": "Archive the billsplit Flutter app to testsAndMisc-archive together with everything coupled to it, so the monorepo's 100% coverage gate and binary-allowlist stay consistent.",
+  "scope": [
+    "billsplit/ (73 files) - removed",
+    "python_pkg/billsplit_coverage/ (5 files) - removed, its only purpose was gating billsplit",
+    ".github/workflows/billsplit-ci.yml - removed",
+    "python_pkg/app_icons/apps.py - billsplit registry entry removed",
+    ".binary-allowlist, .gitignore, .prettierignore, AGENTS.md - billsplit rules removed",
+    "Non-goal: app_icons itself stays; only its billsplit entry goes"
+  ],
+  "changes": [
+    "Extracted billsplit/ and python_pkg/billsplit_coverage/ in one filter-repo pass (8 commits, matching the monorepo's count for those paths) and merged into kuhyx/testsAndMisc-archive, where billsplit_coverage joins the existing python_pkg/ tree.",
+    "Deleted the app_icons AppIcon entry keyed 'billsplit', whose repo= pointed at _HOME/testsAndMisc/billsplit. app_icons stays in the repo and its tests iterate APPS generically, so a dangling entry would have failed the suite.",
+    "Emptied .binary-allowlist: billsplit's launcher icons were its only entries. The policy header is kept and now records that no exception is in force.",
+    "Removed the 27-line billsplit block from .gitignore (the ! overrides that paired with the allowlist) and the .prettierignore fixture line.",
+    "Rewrote the AGENTS.md 'Adding a Flutter app' section: the both-halves guidance is still correct for a future app, but no longer claims billsplit exists, and notes a Flutter app now belongs in its own repo."
+  ],
+  "verification": [
+    {
+      "command": "git ls-files <path> | wc -l, archive vs source",
+      "result": "pass",
+      "evidence": "billsplit 73 = 73, python_pkg/billsplit_coverage 5 = 5; 8 commits, equal to git log --oneline -- billsplit python_pkg/billsplit_coverage."
+    },
+    {
+      "command": "diff -r --brief between archived copy and working tree",
+      "result": "pass",
+      "evidence": "No content differences for either path."
+    },
+    {
+      "command": "gh api repos/kuhyx/testsAndMisc-archive/contents --jq '.[].name'",
+      "result": "pass",
+      "evidence": "billsplit listed; billsplit_coverage confirmed under the archive's python_pkg/ alongside the previously archived packages."
+    },
+    {
+      "command": "python3 meta/scripts/pytest_changed_packages.py python_pkg/app_icons/apps.py",
+      "result": "pass",
+      "evidence": "2095 passed, TOTAL coverage 100.00% - the gate holds after removing the registry entry. Count fell from 2114 by exactly the 19 billsplit_coverage tests."
+    },
+    {
+      "command": "PYTHONPATH=. python3 -c 'from python_pkg.app_icons import apps; ...'",
+      "result": "pass",
+      "evidence": "Registry loads with 12 apps and 'billsplit' in apps.APPS is False. Seven other apps still carry linux=False, so no cli.py branch lost its only exercise."
+    },
+    {
+      "command": "./meta/scripts/check_no_binaries.sh",
+      "result": "pass",
+      "evidence": "Exit 0 with an entry-free .binary-allowlist - the checker tolerates a comment-only file."
+    },
+    {
+      "command": "./meta/scripts/check_directory_depth.sh --all",
+      "result": "pass (improvement)",
+      "evidence": "451 -> 417 violations, matching billsplit's 34 deep files."
+    }
+  ],
+  "risks": [
+    "app_icons' generator can no longer produce billsplit's icons; that is intended, since the app and its assets now live in the archive.",
+    ".binary-allowlist is now empty of patterns. If a future Flutter app is added, both it and the .gitignore ! overrides must be repopulated - AGENTS.md still documents that requirement.",
+    "The archive push happened before the local delete; presence was confirmed through the GitHub API rather than assumed."
+  ],
+  "rollback": [
+    "git revert the removal commit to restore all four trees and the config blocks.",
+    "Re-run meta/scripts/pytest_changed_packages.py to confirm the coverage gate is still satisfied after the revert."
+  ]
+}

python_pkg/app_icons/apps.py

@@ -115,20 +115,6 @@ APPS: Final[dict[str, AppIcon]] = {
             icon_name="home-inventory",
             linux=True,
         ),
-        AppIcon(
-            key="billsplit",
-            # The only app in this registry that lives inside the testsAndMisc
-            # monorepo rather than in its own repo, so its path carries a
-            # directory component the others do not.
-            repo=_HOME / "testsAndMisc" / "billsplit",
-            accent="#B8862E",
-            glyph="receipt-split",
-            icon_name="billsplit",
-            # `flutter create` scaffolded a linux/ target, but the app is
-            # phone-first and ships no desktop entry, so the hicolor icon set
-            # is not generated for it.
-            linux=False,
-        ),
         AppIcon(
             key="epopeja_karta",
             repo=_HOME / "epopeja_karta",

python_pkg/billsplit_coverage/__init__.py

@@ -1,13 +0,0 @@
-"""Coverage gate for the ``billsplit/`` Flutter app.
-
-``flutter test --coverage`` reports success while leaving whole files untouched,
-so this package re-reads the lcov report it produces and fails unless every
-``lib/`` file is present *and* fully covered. It lives here rather than beside
-the app because every Python file in this repository belongs under
-``python_pkg/``; the app itself holds only Dart.
-
-Usage:
-    PYTHONPATH=~/testsAndMisc python3 -m python_pkg.billsplit_coverage
-"""
-
-from __future__ import annotations

python_pkg/billsplit_coverage/__main__.py

@@ -1,14 +0,0 @@
-"""Module entry point for the billsplit coverage gate.
-
-Usage:
-    PYTHONPATH=~/testsAndMisc python3 -m python_pkg.billsplit_coverage
-"""
-
-from __future__ import annotations
-
-import sys
-
-from python_pkg.billsplit_coverage.checker import main
-
-if __name__ == "__main__":
-    sys.exit(main())

python_pkg/billsplit_coverage/checker.py

@@ -1,130 +0,0 @@
-"""Fail unless lcov reports 100% line coverage for every ``billsplit/lib`` file.
-
-Two separate checks, because they catch different mistakes: a file present in
-the report but with unhit lines, and a file missing from the report entirely.
-The second is the one that catches a newly added Dart file nothing imports —
-partial coverage is visible in the report, absence is not.
-
-The default project root is resolved from this file's location rather than the
-working directory, so the CI job can invoke the module from anywhere in the
-repository.
-"""
-
-from __future__ import annotations
-
-import argparse
-import pathlib
-import sys
-from typing import Final
-
-# python_pkg/billsplit_coverage/checker.py -> repo root -> billsplit/
-_DEFAULT_PROJECT: Final[pathlib.Path] = (
-    pathlib.Path(__file__).resolve().parents[2] / "billsplit"
-)
-
-EXIT_INCOMPLETE: Final[int] = 1
-EXIT_NO_REPORT: Final[int] = 2
-
-
-def parse_lcov(lcov: pathlib.Path) -> dict[str, list[int]]:
-    """Map each file in an lcov report to its uncovered line numbers.
-
-    Parameters:
-    lcov (pathlib.Path): Path to an ``lcov.info`` report.
-
-    Returns:
-    dict[str, list[int]]: Source path to the lines with a zero hit count. A
-        fully covered file maps to an empty list, which is what lets the caller
-        tell "covered completely" apart from "absent from the report".
-    """
-    uncovered: dict[str, list[int]] = {}
-    current: str | None = None
-    for line in lcov.read_text(encoding="utf-8").splitlines():
-        if line.startswith("SF:"):
-            # lcov quotes the path verbatim; normalise Windows separators.
-            current = line[3:].replace("\\", "/")
-            uncovered.setdefault(current, [])
-        elif line.startswith("DA:") and current is not None:
-            number, hits = line[3:].split(",")
-            if int(hits) == 0:
-                uncovered[current].append(int(number))
-    return uncovered
-
-
-def find_failures(
-    uncovered: dict[str, list[int]],
-    project: pathlib.Path,
-) -> list[str]:
-    """Describe every coverage gap, as lines ready to print.
-
-    Parameters:
-    uncovered (dict[str, list[int]]): Output of :func:`parse_lcov`.
-    project (pathlib.Path): Flutter project root holding ``lib/``.
-
-    Returns:
-    list[str]: One message per gap; empty when coverage is complete.
-    """
-    failures = [
-        f"{path}: uncovered lines {misses}"
-        for path, misses in sorted(uncovered.items())
-        if misses
-    ]
-    lib_files = {
-        str(path.relative_to(project)).replace("\\", "/")
-        for path in (project / "lib").rglob("*.dart")
-    }
-    failures.extend(
-        f"{path}: not executed by any test (0% coverage)"
-        for path in sorted(lib_files - set(uncovered))
-    )
-    return failures
-
-
-def check(project: pathlib.Path) -> int:
-    """Run the gate for one Flutter project and report to stdout/stderr.
-
-    Parameters:
-    project (pathlib.Path): Flutter project root, i.e. the directory holding
-        ``lib/`` and ``coverage/lcov.info``.
-
-    Returns:
-    int: 0 when coverage is complete, :data:`EXIT_INCOMPLETE` when it is not,
-        :data:`EXIT_NO_REPORT` when the lcov report is missing.
-    """
-    lcov = project / "coverage" / "lcov.info"
-    if not lcov.exists():
-        sys.stderr.write(f"{lcov} missing — run: flutter test --coverage\n")
-        return EXIT_NO_REPORT
-
-    uncovered = parse_lcov(lcov)
-    failures = find_failures(uncovered, project)
-    if failures:
-        sys.stderr.write("COVERAGE < 100%:\n")
-        for failure in failures:
-            sys.stderr.write(f"  {failure}\n")
-        return EXIT_INCOMPLETE
-
-    sys.stdout.write(f"100% line coverage across {len(uncovered)} lib files.\n")
-    return 0
-
-
-def main(argv: list[str] | None = None) -> int:
-    """Parse arguments and run the gate.
-
-    Parameters:
-    argv (list[str] | None): Argument list, or None to read ``sys.argv``.
-
-    Returns:
-    int: Process exit status.
-    """
-    parser = argparse.ArgumentParser(
-        description="Fail unless billsplit has 100% line coverage.",
-    )
-    parser.add_argument(
-        "--project",
-        type=pathlib.Path,
-        default=_DEFAULT_PROJECT,
-        help="Flutter project root (defaults to the billsplit/ app in this repo)",
-    )
-    args = parser.parse_args(argv)
-    return check(args.project)

python_pkg/billsplit_coverage/tests/__init__.py

@@ -1,3 +0,0 @@
-"""Tests for the billsplit coverage gate."""
-
-from __future__ import annotations

python_pkg/billsplit_coverage/tests/test_checker.py

@@ -1,191 +0,0 @@
-"""Tests for the billsplit coverage gate."""
-
-from __future__ import annotations
-
-import runpy
-import sys
-from typing import TYPE_CHECKING
-from unittest.mock import MagicMock, patch
-
-import pytest
-
-from python_pkg.billsplit_coverage import checker
-
-if TYPE_CHECKING:
-    import pathlib
-
-
-def make_project(
-    root: pathlib.Path,
-    lcov: str | None = None,
-    dart_files: tuple[str, ...] = ("lib/main.dart",),
-) -> pathlib.Path:
-    """Build a throwaway Flutter project tree.
-
-    Parameters:
-    root (pathlib.Path): Directory to build the project in.
-    lcov (str | None): Contents of ``coverage/lcov.info``; None writes no
-        report at all, which is the missing-report case.
-    dart_files (tuple[str, ...]): Project-relative Dart files to create.
-
-    Returns:
-    pathlib.Path: The project root.
-    """
-    for relative in dart_files:
-        path = root / relative
-        path.parent.mkdir(parents=True, exist_ok=True)
-        path.write_text("void main() {}\n", encoding="utf-8")
-    if lcov is not None:
-        report = root / "coverage" / "lcov.info"
-        report.parent.mkdir(parents=True, exist_ok=True)
-        report.write_text(lcov, encoding="utf-8")
-    return root
-
-
-class TestParseLcov:
-    def test_records_only_unhit_lines(self, tmp_path: pathlib.Path) -> None:
-        report = tmp_path / "lcov.info"
-        report.write_text(
-            "SF:lib/main.dart\nDA:1,3\nDA:2,0\nDA:9,0\nend_of_record\n",
-            encoding="utf-8",
-        )
-        assert checker.parse_lcov(report) == {"lib/main.dart": [2, 9]}
-
-    def test_fully_covered_file_maps_to_empty_list(
-        self, tmp_path: pathlib.Path
-    ) -> None:
-        """Present-and-covered must be distinguishable from absent."""
-        report = tmp_path / "lcov.info"
-        report.write_text("SF:lib/a.dart\nDA:1,1\nend_of_record\n", encoding="utf-8")
-        assert checker.parse_lcov(report) == {"lib/a.dart": []}
-
-    def test_normalises_windows_separators(self, tmp_path: pathlib.Path) -> None:
-        report = tmp_path / "lcov.info"
-        report.write_text("SF:lib\\ui\\home.dart\nDA:1,1\n", encoding="utf-8")
-        assert "lib/ui/home.dart" in checker.parse_lcov(report)
-
-    def test_da_before_any_sf_is_ignored(self, tmp_path: pathlib.Path) -> None:
-        """A DA: line with no preceding SF: has no file to attribute to."""
-        report = tmp_path / "lcov.info"
-        report.write_text("DA:1,0\nSF:lib/a.dart\nDA:2,0\n", encoding="utf-8")
-        assert checker.parse_lcov(report) == {"lib/a.dart": [2]}
-
-    def test_unrelated_lines_are_skipped(self, tmp_path: pathlib.Path) -> None:
-        report = tmp_path / "lcov.info"
-        report.write_text(
-            "TN:\nSF:lib/a.dart\nLF:2\nLH:1\nDA:1,0\nend_of_record\n",
-            encoding="utf-8",
-        )
-        assert checker.parse_lcov(report) == {"lib/a.dart": [1]}
-
-    def test_empty_report_yields_nothing(self, tmp_path: pathlib.Path) -> None:
-        report = tmp_path / "lcov.info"
-        report.write_text("", encoding="utf-8")
-        assert checker.parse_lcov(report) == {}
-
-
-class TestFindFailures:
-    def test_no_gaps_returns_empty(self, tmp_path: pathlib.Path) -> None:
-        project = make_project(tmp_path, lcov="")
-        assert checker.find_failures({"lib/main.dart": []}, project) == []
-
-    def test_reports_uncovered_lines(self, tmp_path: pathlib.Path) -> None:
-        project = make_project(tmp_path, lcov="")
-        failures = checker.find_failures({"lib/main.dart": [2, 7]}, project)
-        assert failures == ["lib/main.dart: uncovered lines [2, 7]"]
-
-    def test_reports_file_absent_from_report(self, tmp_path: pathlib.Path) -> None:
-        project = make_project(
-            tmp_path, lcov="", dart_files=("lib/main.dart", "lib/orphan.dart")
-        )
-        failures = checker.find_failures({"lib/main.dart": []}, project)
-        assert failures == ["lib/orphan.dart: not executed by any test (0% coverage)"]
-
-    def test_reports_both_kinds_together(self, tmp_path: pathlib.Path) -> None:
-        project = make_project(
-            tmp_path, lcov="", dart_files=("lib/main.dart", "lib/orphan.dart")
-        )
-        failures = checker.find_failures({"lib/main.dart": [4]}, project)
-        assert failures == [
-            "lib/main.dart: uncovered lines [4]",
-            "lib/orphan.dart: not executed by any test (0% coverage)",
-        ]
-
-    def test_finds_dart_files_in_subdirectories(self, tmp_path: pathlib.Path) -> None:
-        project = make_project(
-            tmp_path, lcov="", dart_files=("lib/domain/split_engine.dart",)
-        )
-        failures = checker.find_failures({}, project)
-        assert failures == [
-            "lib/domain/split_engine.dart: not executed by any test (0% coverage)"
-        ]
-
-
-class TestCheck:
-    def test_missing_report_exits_two(
-        self, tmp_path: pathlib.Path, capsys: pytest.CaptureFixture[str]
-    ) -> None:
-        project = make_project(tmp_path)
-        assert checker.check(project) == checker.EXIT_NO_REPORT
-        assert "flutter test --coverage" in capsys.readouterr().err
-
-    def test_incomplete_coverage_exits_one_and_names_files(
-        self, tmp_path: pathlib.Path, capsys: pytest.CaptureFixture[str]
-    ) -> None:
-        project = make_project(
-            tmp_path,
-            lcov="SF:lib/main.dart\nDA:1,1\nDA:2,0\n",
-            dart_files=("lib/main.dart", "lib/orphan.dart"),
-        )
-        assert checker.check(project) == checker.EXIT_INCOMPLETE
-        err = capsys.readouterr().err
-        assert "COVERAGE < 100%:" in err
-        assert "lib/main.dart: uncovered lines [2]" in err
-        assert "lib/orphan.dart: not executed by any test" in err
-
-    def test_full_coverage_exits_zero(
-        self, tmp_path: pathlib.Path, capsys: pytest.CaptureFixture[str]
-    ) -> None:
-        project = make_project(tmp_path, lcov="SF:lib/main.dart\nDA:1,1\n")
-        assert checker.check(project) == 0
-        assert "100% line coverage across 1 lib files." in capsys.readouterr().out
-
-
-class TestMain:
-    def test_project_flag_selects_the_tree(self, tmp_path: pathlib.Path) -> None:
-        project = make_project(tmp_path, lcov="SF:lib/main.dart\nDA:1,1\n")
-        assert checker.main(["--project", str(project)]) == 0
-
-    def test_defaults_to_the_repo_billsplit_app(self) -> None:
-        """With no --project, the gate resolves billsplit/ from this file."""
-        with patch.object(checker, "check", return_value=0) as mock_check:
-            assert checker.main([]) == 0
-        assert mock_check.call_args[0][0].name == "billsplit"
-
-    def test_propagates_failure_status(self, tmp_path: pathlib.Path) -> None:
-        project = make_project(tmp_path)
-        assert checker.main(["--project", str(project)]) == checker.EXIT_NO_REPORT
-
-
-class TestModuleEntry:
-    def test_main_called_when_run_as_module(self) -> None:
-        """python3 -m python_pkg.billsplit_coverage runs main() and exits."""
-        mock_main = MagicMock(return_value=0)
-        # runpy warns if __main__ is already imported, and the suite may run in
-        # a random order, so another test could have imported it first.
-        sys.modules.pop("python_pkg.billsplit_coverage.__main__", None)
-        with (
-            patch("python_pkg.billsplit_coverage.checker.main", mock_main),
-            pytest.raises(SystemExit) as excinfo,
-        ):
-            runpy.run_module("python_pkg.billsplit_coverage", run_name="__main__")
-        assert excinfo.value.code == 0
-        mock_main.assert_called_once()
-
-    def test_main_not_called_on_plain_import(self) -> None:
-        """Importing __main__ must not run the gate as a side effect."""
-        mock_main = MagicMock()
-        with patch("python_pkg.billsplit_coverage.checker.main", mock_main):
-            sys.modules.pop("python_pkg.billsplit_coverage.__main__", None)
-            runpy.run_module("python_pkg.billsplit_coverage.__main__")
-        mock_main.assert_not_called()