Closes #415
## What changed
- add a Queue Today action to available Find cards
- preserve the active Today session while claiming, planning, syncing, and warming work offline
- keep the mobile Find sheet open with 44px, 320px-safe actions
- report assignment/local-sync partial recovery truthfully
## Verification
- RED observed for queue single-flight, planning/sync behavior, mobile wiring, and offline shell cache
- `python3 -m pytest tests/test_assign_and_start.py -q` (9 passed)
- `python3 -m pytest tests/ -q` (795 passed)
- `node --check` on changed JavaScript
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Closes #415
What changed
Verification
python3 -m pytest tests/test_assign_and_start.py -q(9 passed)python3 -m pytest tests/ -q(795 passed)node --checkon changed JavaScript