Stop debounced entry resets surfacing "Cancelled" error toast

[myieye]

Rapid filter typing / entry switching in the viewer could pop a red "Cancelled" error toast. runed's useDebounce rejects pending promises with the string "Cancelled" when cancel() supersedes them; in EntryLoaderService those rejections went unhandled (notably the fire-and-forget void this.#scheduleFilterReset() in the watch), so the global error handler surfaced them.

Fix swallows only the "Cancelled" string rejection at the two debounced call sites (#scheduleFilterReset, #scheduleEventReset), rethrowing anything else so genuine load errors still surface. Scoped to the service rather than the global handler to keep the suppression narrow.

Reproduced on /testing/project-view by typing a filter and immediately clicking an entry. svelte-check clean.

🤖 Generated with Claude Code

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📝 Walkthrough

Walkthrough

A helper function ignoreDebounceCancelled was added to entry-loader-service.svelte.ts to intercept and suppress promise rejections with reason "Cancelled", while rethrowing other errors. It is applied via .catch(...) in both #scheduleFilterReset() and #scheduleEventReset().

Changes

Debounce cancellation handling

Layer / File(s)	Summary
Cancellation helper and reset wiring frontend/viewer/src/lib/services/entry-loader-service.svelte.ts	Adds ignoreDebounceCancelled to swallow "Cancelled" rejections and rethrow others, and applies it via .catch(...) to both #scheduleFilterReset and #scheduleEventReset debounced promises.

Estimated code review effort: 1 (Trivial) | ~5 minutes

Poem

A cancelled hop, no need to fret,
The rabbit catches, no regret. 🐇
"Cancelled" whispers pass on by,
Real errors still get flagged, not shy.
Debounce resets now smooth and neat!

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately summarizes the main change: suppressing debounced reset 'Cancelled' errors from showing as toasts.
Description check	✅ Passed	The description matches the changeset and explains the root cause, fix, and scope clearly.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
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.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch claude/vibrant-wilson-37e435

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Build	Status	Details	Updated (UTC)
default (Inspect)	✅ No changes detected	-	Jul 6, 2026, 1:27 PM

[coderabbitai]

🧹 Nitpick comments (1)

frontend/viewer/src/lib/services/entry-loader-service.svelte.ts (1)

30-37: 📐 Maintainability & Code Quality | 🔵 Trivial | ⚡ Quick win

Consider a test for the rethrow branch.

The existing test around debounce collapsing (entry-loader-service.svelte.test.ts:184-204) confirms the suppression path works but doesn't assert that a non-"Cancelled" rejection from the debounced reset still propagates as an error. Worth adding given this is the crux of the fix (only suppress the specific cancellation, not genuine failures).

🤖 Prompt for AI Agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In `@frontend/viewer/src/lib/services/entry-loader-service.svelte.ts` around lines
30 - 37, Add a test in entry-loader-service.svelte.test.ts for the rethrow path
of ignoreDebounceCancelled: verify that when the debounced reset rejects with
something other than "Cancelled", the error is not swallowed and still
propagates. Extend the existing debounce collapsing coverage around the entry
loader service/reset flow so it asserts the suppression only applies to the
specific cancellation case, while genuine failures from useDebounce remain
observable.

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Nitpick comments:
In `@frontend/viewer/src/lib/services/entry-loader-service.svelte.ts`:
- Around line 30-37: Add a test in entry-loader-service.svelte.test.ts for the
rethrow path of ignoreDebounceCancelled: verify that when the debounced reset
rejects with something other than "Cancelled", the error is not swallowed and
still propagates. Extend the existing debounce collapsing coverage around the
entry loader service/reset flow so it asserts the suppression only applies to
the specific cancellation case, while genuine failures from useDebounce remain
observable.

---

ℹ️ Review info

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📥 Commits

Reviewing files that changed from the base of the PR and between 915ca19 and b99fdff.

📒 Files selected for processing (1)

• frontend/viewer/src/lib/services/entry-loader-service.svelte.ts

[myieye]

Addressed the nitpick: exported ignoreDebounceCancelled and added tests asserting "Cancelled" is swallowed while any other rejection rethrows (40858cd). The service-level reset path cannot exercise the rethrow branch because #executeReset swallows its own fetch errors into service.error, so the helper is tested directly.

🤖 Addressed by Claude Code