CardChooserModal: mixed cards+files mode with {id, kind} return

[lukemelia]

Closes CS-12205. Phase 2 of the mixed cards+files chooser (parent CS-11809). Stacked on #5531 (CS-12204, file id unification) — review/merge that first.

What

Extend CardChooserModal to run in a mixed cards + files mode via chooseCard(query, { includeFiles: true }), scoped by a base filter, returning each pick tagged with its kind. Most of the data layer already exists from #5428 (mixed search is the default; file rows already render as result tiles).

• Parameterize cardsOnly: the two hardcoded @cardsOnly={{true}} (SearchPanel, Content) become {{not state.includeFiles}}, so mixed mode surfaces file rows and the type picker offers file types.
• Widen the query type: CardChooserQuery.filter now allows AnyFilter so a mixed any base filter type-checks.
• {id, kind}[] return contract: expose kind ('card' | 'file') on RenderableSearchEntryLike / the SearchEntry view-model, derived by reusing the existing file-detection heuristic in search-entries.ts (no new classification path). Thread a kind-tagged selection payload (SearchSelection / SelectedSearchItem) through the result tile → modal so pickCards returns ChosenItem[]. Cards-only callers are unaffected — the chooseCard wrapper projects mixed results back to bare id string(s) unless includeFiles is set.
• chooseCardTitle (ancillary): reviewed — an any filter falls through to the neutral default title, no crash. Left as-is per the ticket's non-blocking note; Phase 3 supplies the real title.

Tests

• search-entries-test: a card row is tagged kind: 'card'; both the item-only and html-only file rows are tagged kind: 'file'.
• card-search-adorn-test (result tile): clicking a card row emits { id, kind: 'card' }; a file row emits { id, kind: 'file' } — the tile is what stamps the kind onto the payload.
• card-chooser-mixed-mode-test (new): a real-index modal driven by the global chooseCard({ includeFiles: true, multiSelect: true }) with the canonical { type: baseRef } mixed filter surfaces both a card instance and a markdown file, and resolves kind-correct { id, kind } picks.
• Updated card-search-selection-menu-test for the SelectedSearchItem selection type.

lint:types (host + runtime-common), eslint, and ember-template-lint are green.

Note

Depends on #5531. The kind on file rows relies on the file id unification only for downstream exclusion (Phase 3); this PR's kind derivation is independent. No reindex required for this PR on its own.

🤖 Generated with Claude Code

[github-actions]

Preview deployments

• Host staging preview

• Host production preview

Host Test Results

    1 files  ±0      1 suites  ±0   3h 9m 0s ⏱️ + 6m 33s
3 549 tests +1  3 534 ✅ +2  15 💤 ±0  0 ❌ ±0 
3 568 runs  +1  3 553 ✅ +3  15 💤 ±0  0 ❌  - 1 

Results for commit cbe8148. ± Comparison against earlier commit 2c2ea62.

Realm Server Test Results

    1 files  ±0      1 suites  ±0   14m 15s ⏱️ - 1m 53s
1 878 tests ±0  1 878 ✅ ±0  0 💤 ±0  0 ❌ ±0 
1 957 runs  ±0  1 957 ✅ ±0  0 💤 ±0  0 ❌ ±0 

Results for commit cbe8148. ± Comparison against earlier commit 2c2ea62.