fix(mobile): queue writes to offline-created notes/labels instead of 404ing

[hanzei]

The bug

Reported flow on Android: open the create-note dialog, start typing, the note autosaves offline, convert it to a list, add two items, indent an item — and a cascade of errors appears.

Server logs show the note's client id (srNo865…) getting GET/PATCH .../items 404 "note not found" repeatedly before the note's own POST /notes finally succeeds (201), followed by 400 "text notes cannot have a title" and 400 "items can only be modified on list notes". Mobile logs show matching Failed to save note: … status code 404 errors and a discarded queued update.

Root cause

A resource created offline carries a server-valid id but its create op sits in the sync queue until it drains. While it's pending, foreground edits went straight to the network through their mutation's online path (isOnlineWriteAllowed(isConnected)), hitting a resource the server doesn't know yet. That returns a permanent 4xx (404, or 403 for reorder), so rethrowIfNotQueueable throws instead of falling back to the queue. The edit is dropped, not queued, and surfaces as an error.

The isNotePendingCreate guard that prevents exactly this already existed in useDuplicateNote, useShareNote, useUnshareNote, and the two label-on-note mutations — it was missing from the note-content, list-item, lifecycle, image, and standalone-label mutations. The reported "indent" is a parent_id PATCH through useUpdateNoteItem, one of the unguarded hooks.

This also explains the downstream 400s: the convertNoteType op 404'd and was dropped too, so the note stayed text-typed on the server. When its create eventually drained, the still-queued title/item ops ran against a text note and were rejected. With the convert now queued FIFO behind the create, it drains first and the note is a list by the time those ops replay.

The fix

Add the established guard — read the pending-create state, and when true skip the online attempt so the write takes the local-persist + enqueue path and drains FIFO behind the create.

Notes / items (useNotes.ts), guarded on isNotePendingCreate:

• useUpdateNote, useConvertNoteType
• all six list-item mutations: useCreateNoteItem, useUpdateNoteItem, useDeleteNoteItem, useReorderNoteItems, useToggleNoteItemCompleted, useUncheckAllItems, useDeleteCompletedItems
• lifecycle ops useDeleteNote, useRestoreNote, usePermanentDeleteNote

Images (useNoteImages.ts):

• useUploadNoteImage — uploading to a pending-create note 404'd and dropped the picked file, even though the offline image-upload queue (drainImageUploadQueue) is specifically built to wait for pending-create notes. Now routed to that queue.

Labels (useLabels.ts), guarded on getPendingLabelIds:

• useRenameLabel, useDeleteLabel — an offline-created label (Accept a client-supplied label ID on the create endpoint (retire local_ IDs for labels) #546) renamed/deleted before its createLabel drained 404'd and dropped the edit.

Deliberately not changed

• useCreateNote — it is the create.
• useReorderNotes — same latent bug (a pending-create note in the batch makes ReorderNotes return ErrNoteNoAccess → 403, and the server rolls the whole reorder transaction back), but its guard shape differs — "queue if any id in the batch is pending" rather than a single-id check — so it's left for a separate change.

Tests

• useNotes.test.tsx: a pending-create guard (#475) block, 12 cases (one per newly-guarded note/item/lifecycle mutation, including the useUpdateNoteItem indent), asserting each queues the op and never calls the API while online + pending-create.
• useNoteImages.test.tsx: upload to a pending-create note goes to the offline queue, not the network.
• useLabels.test.tsx: rename/delete of an offline-created label queues FIFO behind its createLabel.

Full suite green: task test-mobile (1432 passed), task lint-mobile clean.

Artifacts

Mobile-only, offline-timing behavior — no meaningful visual/UI change to screenshot. Verified via unit tests.

🤖 Generated with Claude Code

https://claude.ai/code/session_01SSzBvp74ANKDz5s2XLB7gr

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Walkthrough

The mobile hooks now detect pending note and label creation operations before online writes. Note mutations, label rename/delete actions, and note image uploads apply local changes and enqueue dependent operations until creation drains. Tests cover queued FIFO ordering, local updates, skipped API calls, and pending note mutations across note and item operations.

Poem

A rabbit queues a carrot-white change,
Behind each create, in orderly range.
Labels hop softly, notes thump twice,
Images wait while queues roll dice.
Local leaves flutter; APIs rest.

Merge Risk: 🟡 Moderate · up to 78cfa

The PR prevents edits to offline-created notes and labels from failing against missing server records, but the affected online paths still rely on network-first writes; an interruption before fallback could lose those edits, so this behavior should be addressed before merging.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 20.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 15 functions across 6 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and concisely describes the main change: queue writes for offline-created notes and labels instead of sending them to the server and receiving 4xx errors.
Description check	✅ Passed	The description directly explains the reported bug, root cause, implemented guards, affected hooks, intentional scope limits, and test results. It is fully related to the changeset.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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Actionable comments posted: 1

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Inline comments:
In `@mobile/src/hooks/useNotes.ts`:
- Line 395: Make all listed mutations local-first: persist the local change,
enqueue its replay operation, return immediately, and only let queue draining
attempt the network behind isOnlineWriteAllowed(). Update the note mutations in
mobile/src/hooks/useNotes.ts at lines 395-395, 577-577, 647-647, 683-683,
719-719, 754-754, 791-791, 920-920, 958-958, 1247-1247, 1319-1319, and
1396-1396; the label mutations in mobile/src/hooks/useLabels.ts at lines 390-390
and 448-448; and the image upload in mobile/src/hooks/useNoteImages.ts at line
60-60, preserving each operation’s existing local behavior and replay payload.

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ℹ️ Review info

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📥 Commits

Reviewing files that changed from the base of the PR and between a6aaafd and 78cfa3b.

📒 Files selected for processing (6)

• mobile/__tests__/useLabels.test.tsx
• mobile/__tests__/useNoteImages.test.tsx
• mobile/__tests__/useNotes.test.tsx
• mobile/src/hooks/useLabels.ts
• mobile/src/hooks/useNoteImages.ts
• mobile/src/hooks/useNotes.ts

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resolved