MPDX-9599 - Fix "Changing the fund resets the month filter" and other fixes

[zweatshirt]

Description

• Fixes the issue where changing the fund type resets the user set month filter.
• Fixes the issue where users can't filter by category when navigating months normally.
• Fixes the issue where setting 'None' in the date range filter fails to resolve back to the normal month-by-month flow

Testing

• Go to reports/staffExpense
• Test behavior of switching between fund types, ensuring that any existing date filters aren't reset.
• Test that selecting 'None' for the date range filter in settings correctly resolves to the month-by-month flow
• Check that category filters in the settings work well for the default month-by-month flow

Checklist:

• I have given my PR a title with the format "MPDX-(JIRA#) (summary sentence max 80 chars)"
• I have applied the appropriate labels (Add the label "Preview" to automatically create a preview environment)
• I have run the Claude Code /pr-review command locally and fixed any relevant suggestions
• I have requested a review from another person on the project
• I have tested my changes in preview or in staging
• I have cleaned up my commit history

[github-actions]

Bundle sizes [mpdx-react]

Compared against 1514a65

No significant changes found

[zweatshirt]

🤖 Multi-Agent Code Review — PR #1789

5 agents · Standard mode · Opus

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Risk Assessment

Score: 4/10 — MEDIUM

Factor	Points
3 medium-risk component files (*.tsx, *.ts)	+3
Change volume: ~54 non-test lines (50–200 range)	+1
Scope multiplier: single feature domain	×1.0

Required reviewer level: Any — changes are well-scoped to one feature area.

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Agents Launched

Agent	Included	Reason
Architecture	✅	Always included
Testing	✅	Always included
Standards	✅	Always included
UX	✅	.tsx files changed
Financial Reporting	✅	Files under src/components/Reports/**
Security	⏭	No auth/env/workflow files
Data Integrity	⏭	No schema/migration/cache mutation changes

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Verdict: ✅ APPROVED_WITH_SUGGESTIONS

No blocking issues. The three bugs are correctly fixed, the refactor is clean, and test coverage is solid. Suggestions below are all non-blocking quality improvements.

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Findings

Concerns (4–6) — Non-blocking, worth addressing if easy

1. fetchPolicy: 'no-cache' lacks an explanatory comment (Architecture + Standards + Financial — consensus)

• SettingsDialog.tsx line ~151
• The no-cache policy is the correct fix for the Apollo cache collision between the parent report query (fundTypes: ['Primary', 'Savings', 'Staff Conference Savings']) and the dialog's category preview query (fundTypes: [selectedFundType]). Without a comment, future maintainers may remove it thinking it's a premature optimization.
• Suggested fix: add an inline comment:

  // no-cache prevents this single-fund query from overwriting the parent
  // report's multi-fund cache entry, which caused fund-switching to reset filters
  fetchPolicy: 'no-cache',

2. mutationSpy declared at module scope in SettingsDialog.test.tsx (Testing)

• SettingsDialog.test.tsx line 14
• jest.clearAllMocks() in beforeEach mitigates cross-test contamination, but the two new tests at lines 425 and 441 share the same spy instance. If Jest runs them concurrently (unlikely with default config, but possible with --runInBand off), state bleed is possible.
• Suggested fix: move declaration inside beforeEach or into the two tests that use it.

3. CircularProgress missing aria-label (UX)

• SettingsDialog.tsx loading state
• CircularProgress renders role="progressbar" by default, so it's not fully inaccessible, but screen readers won't announce what is loading.
• Suggested fix:

  <CircularProgress size={24} aria-label={t('Loading categories')} />

4. Return type annotation overstates nullability (Standards)

• getMonthRange.ts — return type is { startMonth: string | null; endMonth: string | null }
• The ?? chain always falls back to baseTime.startOf('month').toISODate(), which returns null only if baseTime is an invalid DateTime — something that shouldn't happen at call sites. The | null is technically accurate to Luxon's type signature but misleads callers into thinking nulls are routine.
• Optional: narrow to { startMonth: string; endMonth: string } with a non-null assertion (!) on the final fallback, or document the assumption.

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Suggestions (1–3) — Low priority

5. DateWindow interface justified by circular-import constraint (Architecture — post-debate)

• Architecture initially rated this 7.5, but Helpers/getMonthRange.ts cannot import Filters from SettingsDialog.tsx without creating a circular dependency (SettingsDialog imports from Helpers). DateWindow is the correct design. No action needed — the interface is appropriate.

6. Settings.now restoration in StaffExpenseReport.test.tsx (Testing — post-debate)

• The manual Settings.now = originalNow at the end of the date filter test isn't protected by try-finally. In practice, the global beforeEach in __tests__/util/setup.ts resets it before the next test, so cross-test contamination is prevented. Low actual risk, but try-finally is a cleaner pattern for future maintainers to copy.

7. Date window asymmetry (startDate-only) worth a comment (Financial)

• getMonthRange.ts: when only startDate is set (no endDate), endMonth falls back to baseTime (current viewed month), not the startDate's month. This is intentional (same as the pre-refactor inline logic) and tested explicitly. A short comment in the function would make the intent obvious.

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Positive Observations

• <Loading loading /> → <CircularProgress size={24} />: Correct fix. The old Loading component uses position: fixed (viewport overlay), which is wrong inside a dialog's DialogContent. The scoped inline spinner is the right pattern.
• getMonthRange.ts extraction: All 6 code paths are unit-tested. The startDate-only asymmetric case (previously invisible in integration tests) is now explicitly documented by the test.
• !filters → !isFilterDateSelected: The root cause of the "month title disappearing on category-only filter" bug. Fix is minimal and correct.
• fetchPolicy: 'no-cache' + skip: !isOpen: Together these correctly solve the cache-collision bug without architectural changes.
• time prop on SettingsDialog: Ensures categories reflect the viewed month, not today's date — important for historical month navigation.

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🤖 Generated with Claude Code — /quality:agent-review (Standard mode, 5 agents)

[zweatshirt]

🤖 Multi-Agent Code Review — PR #1789

5 agents · Standard mode · Opus

Risk Score: 4/10 — MEDIUM | Verdict: ✅ APPROVED_WITH_SUGGESTIONS

No blocking issues. Suggestions posted as a PR comment.

[github-actions]

AI Review Auto-Approval

Risk Level: MEDIUM (4/10)
Verdict: APPROVED_WITH_SUGGESTIONS (suggestions posted, no blockers)

This PR was auto-approved because:

• The multi-agent AI review determined it is medium risk
• No blocking issues were found
• All suggestions have been posted as review comments for the developer to consider

If you believe this PR needs human review, dismiss this approval and request a review manually.

[github-actions]

Preview branch generated at https://MPDX-9599.d3dytjb8adxkk5.amplifyapp.com