fix: invalidate series cache when book status changes

[masonfox]

Summary

Fixes a cache invalidation bug where changing a book's status on /books/:id doesn't refresh the cache on the /series/:name page, causing stale status badges and ratings to be displayed.

Root Cause

The cache invalidation bug existed at two levels:

1. Client-Side (React Query): invalidateBookQueries() in useBookStatus.ts was not invalidating series queries
2. Server-Side (Next.js): SessionService and ProgressService were not calling revalidatePath('/series')

Changes

3 files modified, 3 lines added:

• hooks/useBookStatus.ts:57 - Added series query invalidation using queryKeys.series.all()
• lib/services/session.service.ts:1365 - Added revalidatePath('/series')
• lib/services/progress.service.ts:524 - Added revalidatePath('/series')

Implementation Details

The fix uses "nuclear" invalidation (invalidate all series queries) for simplicity and reliability, consistent with the existing shelf invalidation pattern when specific targeting is complex.

• queryKeys.series.all() returns ['series'], which matches both series list and all series detail pages
• revalidatePath('/series') revalidates both /series (list) and /series/:name (detail) pages

Testing

• ✅ All 4,013 tests pass (188 test files)
• ✅ No regressions detected
• ✅ Changes follow existing patterns

Manual Testing

To verify the fix:

1. Open a series detail page (e.g., /series/Harry%20Potter)
2. Note a book's status badge
3. Change that book's status on /books/:id
4. Return to the series page - status should now update immediately

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

@@           Coverage Diff            @@
##           develop     #409   +/-   ##
========================================
  Coverage    78.66%   78.67%           
========================================
  Files          167      167           
  Lines         7556     7559    +3     
  Branches      1850     1850           
========================================
+ Hits          5944     5947    +3     
  Misses        1127     1127           
  Partials       485      485           

Flag	Coverage Δ
unittests	78.67% <100.00%> (+<0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
hooks/useBookStatus.ts	85.62% <100.00%> (+0.09%)	⬆️
lib/services/progress.service.ts	87.60% <100.00%> (+0.10%)	⬆️
lib/services/session.service.ts	88.18% <100.00%> (+0.03%)	⬆️

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