feat: search frontend (#551)

* feat: better highlight

* feat(search): add long_summary to search vector for improved search results

- Update search vector to include long_summary with weight B (between title A and webvtt C)
- Modify SearchController to fetch long_summary and prioritize its snippets
- Generate snippets from long_summary first (max 2), then from webvtt for remaining slots
- Add comprehensive tests for long_summary search functionality
- Create migration to update search_vector_en column in PostgreSQL

This improves search quality by including summarized content which often contains
key topics and themes that may not be explicitly mentioned in the transcript.

* fix: address code review feedback for search enhancements

- Fix test file inconsistencies by removing references to non-existent model fields
  - Comment out tests for unimplemented features (room_ids, status filters, date ranges)
  - Update tests to only use currently available fields (room_id singular, no room_name/processing_status)
  - Mark future functionality tests with @pytest.mark.skip

- Make snippet counts configurable
  - Add LONG_SUMMARY_MAX_SNIPPETS constant (default: 2)
  - Replace hardcoded value with configurable constant

- Improve error handling consistency in WebVTT parsing
  - Use different log levels for different error types (debug for malformed, warning for decode, error for unexpected)
  - Add catch-all exception handler for unexpected errors
  - Include stack trace for critical errors

All existing tests pass with these changes.

* fix: correct datetime test to include required duration field

* feat: better highlight

* feat: search room names

* feat: acknowledge deleted room

* feat: search filters fix and rank removal

* chore: minor refactoring

* feat: better matches frontend

* chore: self-review (vibe)

* chore: self-review WIP

* chore: self-review WIP

* chore: self-review WIP

* chore: self-review WIP

* chore: self-review WIP

* chore: self-review WIP

* chore: self-review WIP

* remove swc (vibe)

* search url query sync (vibe)

* search url query sync (vibe)

* better casts and cap while

* PR review + simplify frontend hook

* pr: remove search db timeouts

* cleanup tests

* tests cleanup

* frontend cleanup

* index declarations

* refactor frontend (self-review)

* fix search pagination

* clear "x" for search input

* pagination max pages fix

* chore: cleanup

* cleanup

* cleanup

* cleanup

* cleanup

* cleanup

* cleanup

* cleanup

* lockfile

* pr review

www/app/lib/utils.ts

@@ -136,3 +136,10 @@ export function extractDomain(url) {
     return null;
   }
 }
+
+export function assertExists<T>(value: T | null | undefined, err?: string): T {
+  if (value === null || value === undefined) {
+    throw new Error(`Assertion failed: ${err ?? "value is null or undefined"}`);
+  }
+  return value;
+}