Fix #36: filter and search on the Semantic memories panel

[emp3thy]

Closes #36

Summary

Adds filter affordances to the /semantic panel, mirroring the existing reflection_filter_form.html pattern:

• Scope toggle — all (default) / project only / general only. The default preserves existing behavior (project-scope rows for the current project plus all general-scope rows). project only returns only project-scope rows for the current project; general only returns general-scope rows from any project.
• Substring search — case-insensitive match on content via SQL LIKE. % and _ in user input are escaped (with ESCAPE '\') so they match literally rather than as wildcards.
• HTMX-driven — filter form sits at the page level (matching reflections.html); the panel hx-includes the form so each re-render carries the current filter values. Form fires on change/keyup with a 200 ms debounce.

Files touched:

• better_memory/services/semantic.py — extends list_for_project with optional scope_filter and search kwargs (default None preserves existing behavior; existing callers in ui/app.py and mcp/server.py continue to work unchanged).
• better_memory/ui/app.py — /semantic/panel reads scope_filter and search query params; unknown scope_filter values fall back to default. /semantic page passes empty initial_filters.
• better_memory/ui/templates/fragments/semantic_filter_form.html (new) — scope select + search input.
• better_memory/ui/templates/semantic.html — includes the filter form and adds hx-include="#semantic-filter-form" to the panel div.
• Tests: 7 new service-level tests in tests/services/test_semantic.py (filter combinations, LIKE-wildcard escaping, empty-string handling) and 6 new route-level tests in tests/ui/test_semantic.py.

All 65 semantic tests pass (52 pre-existing + 13 new). The 8 errors in tests/hooks/test_post_commit.py are pre-existing environmental signing failures, unrelated to this PR (verified on baseline).

The existing .filter-form CSS class already provides styling — no new CSS needed.

Confidence

~92%. The change strictly mirrors an existing, well-tested pattern (reflection_filter_form.html); the service-layer extension is additive with default None kwargs, so no existing callers change behavior.

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This PR was generated by a scheduled Claude routine that scans open issues and opens PRs only when confidence ≥ 90%.

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Generated by Claude Code

[github-actions]

🟢 Claude BugBot Analysis

No bugs found in the changes. The SQL parameterisation is correct with no injection risk, the LIKE-escape logic properly escapes \, %, and _ and the ESCAPE '\' clause resolves to the single character \ in SQLite as intended, scope-filter branching always produces a non-empty WHERE clause with the right number of bound parameters, and the Flask input validation correctly normalises and whitelist-checks scope_filter before passing it to the service layer.

No bugs were detected in this PR.