Jason d65621a556 test: add error handling and edge case tests for hooks ...

useSettings Tests:
- Add test for null settings state protection
  - Returns null immediately without calling APIs
  - Prevents null pointer errors in save flow
- Add test for save mutation failure
  - Verifies error propagates to caller
  - Ensures restart flag remains untouched on failure
  - Validates no side effects when save fails

useProviderActions Tests:
- Add error propagation tests for CRUD operations
  - updateProvider: propagates errors to caller
  - addProvider: propagates errors to caller
  - deleteProvider: propagates errors to caller
- Add switch mutation error handling tests
  - Claude switch: handles errors silently (no throw)
  - Codex switch: skips plugin sync when mutation fails
  - Verifies plugin sync APIs not called on failure
- Add loading state verification
  - Test all mutations pending scenario (existing)
  - Test all mutations idle scenario (new)
  - Ensures isLoading flag accuracy

useImportExport Edge Case Tests (new file):
- Add test for user cancelling file dialog
  - File dialog returns null (user cancelled)
  - State remains unchanged (selectedFile: "", status: "idle")
  - No error toast shown
- Add test for resetStatus behavior
  - Clears error message and status
  - Preserves selected file path for retry
  - Resets backupId to null

All tests passing: 79/79 (10 new tests)

2025-10-25 22:51:51 +08:00

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