Seventh batch of the 250-line sweep (over-cap count 31 -> 28). The test files
mirror the source split from the previous commit one-for-one:
test_gatelock_mealflow.py 379 -> 227 (+ test_gatelock_dashboard.py)
test_gatelock_fanout.py 335 -> 128 (+ test_gatelock_groups.py)
test_gatelock.py 331 -> 224 (+ test_gatelock_form.py)
`test_gatelock_dashboard.py` follows `_gatelock_dashboard`/the slot walk and
manual sync; `test_gatelock_groups.py` takes the group primitives that
`_gatelock_widgetgroups` now owns; `test_gatelock_form.py` takes the form and
basis/amount cases.
Also closes the remaining half of the fake-tk fail-open. The previous commit's
canary proved every widget-building module is *named* in `_GATE_TK_MODULES`;
it could not prove the patch installs something that is not real tkinter. If
`_FAKE_TK` were imported from the wrong place after the coming `_tk_fakes.py`
split, every module would still be "patched" and the suite would still pass
while building real widgets. `test_fake_tk_actually_replaces_real_tkinter`
now asserts `module.tk is _FAKE_TK` for every entry *inside* the `fake_tk()`
context, plus both `ttk` fakes and restoration afterwards. Verified it fails
closed by making one module skip the patch: it reported exactly that module.
Verified: 704 Python tests / 100% branch coverage, check_patch_targets 0,
pre-commit clean, ~/.local/share/diet_guard byte-identical (gate timer paused
for the batch).
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01RA9ynjqXPnexRQnR5oAuCC
