Persist search sheet state across close/reopen

[FadhlanR]

Resolves CS-12109.

Problem

Closing the operator-mode search sheet discards the entire search — reopening starts from a blank slate. The @mode gate at search-sheet/index.gts destroys the whole SearchPanel → PanelContent → SearchResults → SearchEntriesResource subtree on close, dropping the query, filters, sort, view, pagination, and results.

Approach

A new in-memory, session-scoped SearchSheetState service holds the sheet's state (query text, selected types/realms, sort, view toggle, pagination) plus a snapshot of the last results.

• The @mode-gated subtree is still destroyed on close, so there is no background work while the sheet is closed (the search resource and its realm subscriptions tear down).
• On reopen the subtree remounts, rehydrates from the service, redisplays the cached results snapshot immediately (no blank flash), and re-runs the query to refresh — so newly-created cards show up. Stale-while-revalidate.
• Persistence is opt-in via a @persist flag passed only by the search sheet, so the card choosers (which render their own SearchPanel instances) keep their own clean, per-invocation state.
• The service registers with the reset service, so logout / realm reset clears it. A page reload also clears it (in-memory only, no localStorage).
• resetState now runs only on explicit Cancel / Escape — removed from plain close/blur and from result-select, so those keep the search. Reopening a persisted search opens straight to the results view.

Files

• services/search-sheet-state.ts (new) — the in-memory store + results snapshot, reset-registered.
• search-sheet/index.gts — state backed by the service; reset only on explicit cancel.
• card-search/panel.gts — additive initialActiveSort / onSortChange / persist args (choosers unaffected).
• card-search/panel-content.gts — view + pagination behind @persist; main-results snapshot capture/redisplay.
• operator-mode/submode-layout.gts — reopen to the results view when a search is persisted.

Verification

lint:types, lint:js, and lint:hbs pass in packages/host (with boxel-icons + boxel-ui built).

Remaining

• Host acceptance tests: persist across close/reopen; result-select keeps the search; Cancel/Escape resets; choosers stay clean; in-memory (reset/reload) clears. Draft opened ahead of these per request.
• Manual verification in the dev stack (snapshot → live handoff on reopen).

🤖 Generated with Claude Code

[github-actions]

Preview deployments

• Host staging preview

• Host production preview

Host Test Results

    1 files      1 suites   2h 16m 23s ⏱️
2 931 tests 2 908 ✅ 13 💤  6 ❌ 4 🔥
2 950 runs  2 923 ✅ 13 💤 10 ❌ 4 🔥

Results for commit 48ab0d6.

For more details on these errors, see this check.

Realm Server Test Results

    1 files      1 suites   14m 25s ⏱️
1 620 tests 1 620 ✅ 0 💤 0 ❌
1 670 runs  1 670 ✅ 0 💤 0 ❌

Results for commit 48ab0d6.