await IndexedDB mirroring and Background Sync registration before confirming queued work
retain drafts and foreground outbox items with a truthful degraded-delivery status when background admission is unavailable
apply the durability barrier to issue capture, issue comments, pull comments, and update replies
Verification
pytest -q — 462 passed
rendered at 390×844 and 320×700 — no horizontal overflow; primary action is 44px high
Closes #264
## What changed
- await IndexedDB mirroring and Background Sync registration before confirming queued work
- retain drafts and foreground outbox items with a truthful degraded-delivery status when background admission is unavailable
- apply the durability barrier to issue capture, issue comments, pull comments, and update replies
## Verification
- `pytest -q` — 462 passed
- rendered at 390×844 and 320×700 — no horizontal overflow; primary action is 44px high
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Closes #264
What changed
Verification
pytest -q— 462 passed