refactor: search indexing via pagesave hook

[perber]

No description provided.

[Copilot]

Pull request overview

Refactors search indexing to be driven by the pagesave side-effect hook, using a startup bootstrap to rebuild the index from the tree state and removing the filesystem-based indexer/watcher components.

Changes:

• Replace search bootstrap + fsnotify watcher in Wiki.initSearch() with pagesave.SearchIndexSideEffect.IndexAllPages().
• Add IndexAllPages() to SearchIndexSideEffect and introduce unit tests for bootstrap behavior.
• Delete the legacy search indexer/bootstrap/watcher implementation and its tests.

Reviewed changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
internal/wiki/wiki.go	Switches search bootstrap to SearchIndexSideEffect.IndexAllPages() and removes watcher shutdown logic.
internal/wiki/wiki_path_test.go	Removes tests for searchRootDir after deleting that helper.
internal/wiki/pagesave/search_effect.go	Adds IndexAllPages() to rebuild the search index from the tree.
internal/wiki/pagesave/search_effect_test.go	Adds tests for IndexAllPages() indexing and clearing stale entries.
internal/search/watcher.go	Removes filesystem watcher implementation.
internal/search/indexer.go	Removes worker-based filesystem indexer.
internal/search/indexer_test.go	Removes indexer tests.
internal/search/bootstrap.go	Removes BuildAndRunIndexer bootstrap logic.
internal/search/bootstrap_test.go	Removes bootstrap tests.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.