> For the complete documentation index, see [llms.txt](https://faction-os.gitbook.io/faction-os-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://faction-os.gitbook.io/faction-os-docs/.spec_system/archive/sessions/phase21-session01-expansion-state-foundation/implementation-notes.md).

# Implementation Notes

**Session ID**: `phase21-session01-expansion-state-foundation` **Package**: apps/web **Started**: 2026-06-29 16:16 **Last Updated**: 2026-06-29 16:36

***

## Session Progress

| Metric              | Value   |
| ------------------- | ------- |
| Tasks Completed     | 18 / 18 |
| Estimated Remaining | 0 hours |
| Blockers            | 0       |

***

## Task Log

### 2026-06-29 - Session Start

**Environment verified**:

* [x] Prerequisites confirmed
* [x] Tools available
* [x] Directory structure ready

***

### Task T001 - Verify Phase 21 Session 01 prerequisites and analyzer state

**Started**: 2026-06-29 16:14 **Completed**: 2026-06-29 16:16 **Duration**: 2 minutes

**Notes**:

* Confirmed active spec-system session, package scope, Phase 21 session stub, and Phase 21 PRD prerequisites before implementation.
* Switched the shell to the repository-required Node runtime through local `nvm` after detecting the default shell had Node 24.14.0.

**Files Changed**:

* `.spec_system/specs/phase21-session01-expansion-state-foundation/implementation-notes.md` - Created implementation progress log for this session.
* `.spec_system/specs/phase21-session01-expansion-state-foundation/tasks.md` - Marked prerequisite verification complete.

**Verification**:

* Command/check: `bash /home/aiwithapex/.codex/plugins/cache/apex-spec-system/apex-spec/2.1.3-codex/skills/apex-spec/scripts/analyze-project.sh --json`
  * Result: PASS - Active session resolved.
  * Evidence: Output reported `current_session: phase21-session01-expansion-state-foundation`, `current_session_dir_exists: true`, `monorepo: true`, and Phase 21 candidate session package `apps/web`.
* Command/check: `bash /home/aiwithapex/.codex/plugins/cache/apex-spec-system/apex-spec/2.1.3-codex/skills/apex-spec/scripts/check-prereqs.sh --json --env --package apps/web`
  * Result: PASS - Environment and package prerequisites available.
  * Evidence: Output reported overall `pass`, `.spec_system`, `jq`, `git`, registered package `apps/web`, package manifest, and npm 11.16.0.
* Command/check: `source ~/.nvm/nvm.sh && nvm use 26.2.0 && node --version && npm --version`
  * Result: PASS - Required runtime available.
  * Evidence: Output reported Node `v26.2.0` and npm `11.16.0`.
* UI product-surface check: N/A - This prerequisite task did not change runtime UI.
* UI craft check: N/A - This prerequisite task did not change runtime UI.

***

### Task T002 - Audit settings store transient fields, persistence shape, and reset semantics

**Started**: 2026-06-29 16:16 **Completed**: 2026-06-29 16:18 **Duration**: 2 minutes

**Notes**:

* Confirmed `DEFAULT_SETTINGS` contains only durable settings while transient overlay booleans are currently initialized inline in the Zustand store.
* Confirmed `persist(...)`, `PersistedSnapshot`, `loadPersistedSettings()`, and `normalizePersistedSettings(...)` only handle durable settings fields.
* Confirmed `resetSettings()` currently calls `set(defaults)`, which relies on Zustand partial merge semantics and therefore does not clear omitted transient fields.

**Files Changed**:

* `.spec_system/specs/phase21-session01-expansion-state-foundation/implementation-notes.md` - Logged store audit evidence.
* `.spec_system/specs/phase21-session01-expansion-state-foundation/tasks.md` - Marked store audit complete.

**Verification**:

* Command/check: `sed -n '1,520p' apps/web/src/store/useSettingsStore.ts`
  * Result: PASS - Store transient and durable boundaries inspected.
  * Evidence: Found inline transient defaults for replay, shortcut, command palette, settings drawer, heatmap, standings, leaderboard, tool usage, complexity overlay, and standings initial view; persisted snapshot types and `persist(...)` omit those transient fields.
* Command/check: `rg "DEFAULT_SETTINGS|resetSettings|useSettingsStore\\.setState|settingsDrawerOpen|commandPaletteOpen|replayPanelOpen|heatmapOpen|standingsOpen|leaderboardOpen|toolUsageOpen|complexityOverlayOpen" apps/web/src -n`
  * Result: PASS - Runtime reset/persistence touch points inspected.
  * Evidence: Found `LocalErasurePanel.tsx` direct `setState({ ...DEFAULT_SETTINGS })`, `SettingsDrawer` and `CommandPalette` using `resetSettings()`, and no source persistence path for transient overlay fields.
* UI product-surface check: N/A - Audit only; no runtime UI changed.
* UI craft check: N/A - Audit only; no runtime UI changed.

### Task T003 - Audit DEFAULT\_SETTINGS reset sites that can leak transient overlays

**Started**: 2026-06-29 16:16 **Completed**: 2026-06-29 16:18 **Duration**: 2 minutes

**Notes**:

* Identified target test reset helpers that spread `DEFAULT_SETTINGS` and either omit transient fields or maintain parallel transient reset lists.
* Confirmed the task-listed reset helpers can use one canonical transient defaults export to prevent stale expanded bottom-rail state leakage.

**Files Changed**:

* `.spec_system/specs/phase21-session01-expansion-state-foundation/implementation-notes.md` - Logged reset-helper audit evidence.
* `.spec_system/specs/phase21-session01-expansion-state-foundation/tasks.md` - Marked reset-helper audit complete.

**Verification**:

* Command/check: `rg "DEFAULT_SETTINGS|resetSettings|useSettingsStore\\.setState|settingsDrawerOpen|commandPaletteOpen|replayPanelOpen|heatmapOpen|standingsOpen|leaderboardOpen|toolUsageOpen|complexityOverlayOpen" apps/web/tests -n`
  * Result: PASS - Reset-helper sites inspected.
  * Evidence: Found the task-listed reset helpers in `settingsNotifications.test.ts`, `SettingsAudio.test.tsx`, `CockpitShell.test.tsx`, `MobileAccessibility.test.tsx`, `KeyboardShortcutsModal.test.tsx`, `CommandPalette.test.tsx`, `keyboardShortcuts.test.ts`, `NoticeBoard.test.tsx`, `HeroRosterSort.test.tsx`, and `useNotifications.test.tsx`.
* Command/check: `nl -ba apps/web/tests/... | sed -n ...`
  * Result: PASS - Target reset blocks inspected with surrounding context.
  * Evidence: Confirmed the relevant reset helpers set durable defaults directly and need the new transient expansion default included.
* UI product-surface check: N/A - Audit only; no runtime UI changed.
* UI craft check: N/A - Audit only; no runtime UI changed.

***

### Task T004 - Add BottomRailSurfaceId typed union

**Started**: 2026-06-29 16:19 **Completed**: 2026-06-29 16:20 **Duration**: 1 minute

**Notes**:

* Added the bottom-rail-only surface id union with the three Phase 21 allowed ids.
* Kept the type in the settings store module so later sessions import one canonical contract.

**Files Changed**:

* `apps/web/src/store/useSettingsStore.ts` - Added `BottomRailSurfaceId` union type.
* `.spec_system/specs/phase21-session01-expansion-state-foundation/implementation-notes.md` - Logged task evidence.
* `.spec_system/specs/phase21-session01-expansion-state-foundation/tasks.md` - Marked typed union task complete.

**Verification**:

* Command/check: `rg "BottomRailSurfaceId" apps/web/src/store/useSettingsStore.ts -n`
  * Result: PASS - Type boundary exists in the store module.
  * Evidence: The union is `quest-board | orchestration | war-room`.
* UI product-surface check: N/A - Type-only change; no visible surface changed.
* UI craft check: N/A - Type-only change; no visible surface changed.

**BQC Fixes**:

* Contract alignment: Added a single exported union type for later component/store contracts (`apps/web/src/store/useSettingsStore.ts`).

***

### Task T005 - Add expandedBottomRailSurfaceId and setter to settings store interface

**Started**: 2026-06-29 16:20 **Completed**: 2026-06-29 16:21 **Duration**: 1 minute

**Notes**:

* Added the transient field and setter signature to `SettingsState`.
* Kept the field typed as `BottomRailSurfaceId | null` so `null` is the only clear state.

**Files Changed**:

* `apps/web/src/store/useSettingsStore.ts` - Added interface field and setter signature.
* `.spec_system/specs/phase21-session01-expansion-state-foundation/implementation-notes.md` - Logged task evidence.
* `.spec_system/specs/phase21-session01-expansion-state-foundation/tasks.md` - Marked interface task complete.

**Verification**:

* Command/check: `rg "expandedBottomRailSurfaceId|setExpandedBottomRailSurfaceId" apps/web/src/store/useSettingsStore.ts -n`
  * Result: PASS - Field and setter contract exist in `SettingsState`.
  * Evidence: The field is typed `BottomRailSurfaceId | null`; the setter accepts the same union.
* UI product-surface check: N/A - Store interface change only; no visible surface changed.
* UI craft check: N/A - Store interface change only; no visible surface changed.

**BQC Fixes**:

* Contract alignment: The store interface now declares the runtime state and mutation contract together (`apps/web/src/store/useSettingsStore.ts`).

***

### Task T006 - Introduce canonical transient default state

**Started**: 2026-06-29 16:21 **Completed**: 2026-06-29 16:22 **Duration**: 1 minute

**Notes**:

* Added `DEFAULT_TRANSIENT_SETTINGS` as the canonical defaults object for transient overlay state.
* Kept durable `DEFAULT_SETTINGS` separate so persistence and hydration stay preference-only.

**Files Changed**:

* `apps/web/src/store/useSettingsStore.ts` - Added `TransientSettingsState` and exported `DEFAULT_TRANSIENT_SETTINGS`.
* `.spec_system/specs/phase21-session01-expansion-state-foundation/implementation-notes.md` - Logged task evidence.
* `.spec_system/specs/phase21-session01-expansion-state-foundation/tasks.md` - Marked transient-default task complete.

**Verification**:

* Command/check: `rg "DEFAULT_TRANSIENT_SETTINGS|TransientSettingsState" apps/web/src/store/useSettingsStore.ts -n`
  * Result: PASS - Canonical transient defaults exist separately from durable defaults.
  * Evidence: Defaults include all existing transient overlays plus `expandedBottomRailSurfaceId: null` and `standingsInitialView: null`.
* UI product-surface check: N/A - Store defaults only; no visible surface changed.
* UI craft check: N/A - Store defaults only; no visible surface changed.

**BQC Fixes**:

* State freshness on re-entry: Added one shared transient reset object so omitted fields do not survive reset paths (`apps/web/src/store/useSettingsStore.ts`).

***

### Task T007 - Confirm persisted snapshot excludes expansion state

**Started**: 2026-06-29 16:22 **Completed**: 2026-06-29 16:23 **Duration**: 1 minute

**Notes**:

* Confirmed `expandedBottomRailSurfaceId` is absent from `PersistedSnapshot`, `normalizePersistedSettings(...)`, and `persist(...)`.
* Confirmed stale localStorage values with this key will be ignored because normalization builds a durable defaults object field-by-field.

**Files Changed**:

* `.spec_system/specs/phase21-session01-expansion-state-foundation/implementation-notes.md` - Logged persistence-shape evidence.
* `.spec_system/specs/phase21-session01-expansion-state-foundation/tasks.md` - Marked persistence-shape confirmation complete.

**Verification**:

* Command/check: `rg "expandedBottomRailSurfaceId|PersistedSnapshot|function persist|normalizePersistedSettings|DEFAULT_TRANSIENT_SETTINGS" apps/web/src/store/useSettingsStore.ts -n`
  * Result: PASS - Expansion state references are transient-only.
  * Evidence: `expandedBottomRailSurfaceId` appeared in the interface and transient defaults, while snapshot normalization and persistence remain limited to durable settings fields.
* UI product-surface check: N/A - Persistence-shape confirmation only; no visible surface changed.
* UI craft check: N/A - Persistence-shape confirmation only; no visible surface changed.

**BQC Fixes**:

* Trust boundary enforcement: Stale localStorage input remains normalized field-by-field and cannot hydrate unknown transient keys (`apps/web/src/store/useSettingsStore.ts`).

***

### Task T008 - Initialize expanded bottom-rail state with transient overlays

**Started**: 2026-06-29 16:23 **Completed**: 2026-06-29 16:24 **Duration**: 1 minute

**Notes**:

* Replaced inline overlay initialization with the canonical transient defaults object.
* This initializes `expandedBottomRailSurfaceId` to `null` together with existing transient overlay state.

**Files Changed**:

* `apps/web/src/store/useSettingsStore.ts` - Store creation now spreads `DEFAULT_TRANSIENT_SETTINGS`.
* `.spec_system/specs/phase21-session01-expansion-state-foundation/implementation-notes.md` - Logged task evidence.
* `.spec_system/specs/phase21-session01-expansion-state-foundation/tasks.md` - Marked initialization task complete.

**Verification**:

* Command/check: `sed -n '290,330p' apps/web/src/store/useSettingsStore.ts`
  * Result: PASS - Store initializer uses the canonical transient defaults.
  * Evidence: `create<SettingsState>` spreads `...initial` followed by `...DEFAULT_TRANSIENT_SETTINGS`.
* UI product-surface check: N/A - Store initialization only; no visible surface changed.
* UI craft check: N/A - Store initialization only; no visible surface changed.

**BQC Fixes**:

* State freshness on re-entry: Store imports start from the same transient defaults used by later reset paths (`apps/web/src/store/useSettingsStore.ts`).

***

### Task T009 - Implement expansion setter

**Started**: 2026-06-29 16:24 **Completed**: 2026-06-29 16:25 **Duration**: 1 minute

**Notes**:

* Added `setExpandedBottomRailSurfaceId(...)` to the Zustand store implementation.
* The setter replaces the previous surface id with the supplied id or clears it with `null`.

**Files Changed**:

* `apps/web/src/store/useSettingsStore.ts` - Added expansion setter implementation.
* `.spec_system/specs/phase21-session01-expansion-state-foundation/implementation-notes.md` - Logged task evidence.
* `.spec_system/specs/phase21-session01-expansion-state-foundation/tasks.md` - Marked setter task complete.

**Verification**:

* Command/check: `rg "setExpandedBottomRailSurfaceId" apps/web/src/store/useSettingsStore.ts -n`
  * Result: PASS - Setter exists in interface and store implementation.
  * Evidence: Store implementation calls `set({ expandedBottomRailSurfaceId })`.
* UI product-surface check: N/A - Store mutation only; no visible surface changed.
* UI craft check: N/A - Store mutation only; no visible surface changed.

**BQC Fixes**:

* Contract alignment: Runtime setter behavior now matches the declared field and setter contract (`apps/web/src/store/useSettingsStore.ts`).

***

### Task T010 - Update resetSettings to clear transient overlays

**Started**: 2026-06-29 16:25 **Completed**: 2026-06-29 16:26 **Duration**: 1 minute

**Notes**:

* Updated `resetSettings()` to set durable defaults plus canonical transient defaults in memory.
* Kept persistence limited to durable defaults by passing only `defaults` to `persist(...)`.

**Files Changed**:

* `apps/web/src/store/useSettingsStore.ts` - Reset now clears transient overlays and expansion state while persisting only durable settings.
* `.spec_system/specs/phase21-session01-expansion-state-foundation/implementation-notes.md` - Logged task evidence.
* `.spec_system/specs/phase21-session01-expansion-state-foundation/tasks.md` - Marked reset task complete.

**Verification**:

* Command/check: `sed -n '340,360p' apps/web/src/store/useSettingsStore.ts`
  * Result: PASS - Reset combines durable and transient defaults in memory.
  * Evidence: `set({ ...defaults, ...DEFAULT_TRANSIENT_SETTINGS })` is followed by `persist(defaults)`.
* UI product-surface check: N/A - Store reset behavior only; no visible surface changed.
* UI craft check: N/A - Store reset behavior only; no visible surface changed.

**BQC Fixes**:

* State freshness on re-entry: `resetSettings()` now clears omitted transient fields instead of relying on partial merge semantics (`apps/web/src/store/useSettingsStore.ts`).

***

### Task T011 - Update browser erasure settings reset

**Started**: 2026-06-29 16:26 **Completed**: 2026-06-29 16:27 **Duration**: 1 minute

**Notes**:

* Updated the browser erasure reset hook to reset in-memory durable settings plus transient defaults.
* Kept the existing no-overclaim erasure copy unchanged and avoided calling the persisting `resetSettings()` action during the final runtime reset hook.

**Files Changed**:

* `apps/web/src/components/LocalErasurePanel.tsx` - Reset hook now includes `DEFAULT_TRANSIENT_SETTINGS`.
* `.spec_system/specs/phase21-session01-expansion-state-foundation/implementation-notes.md` - Logged task evidence.
* `.spec_system/specs/phase21-session01-expansion-state-foundation/tasks.md` - Marked browser-erasure reset task complete.

**Verification**:

* Command/check: `sed -n '1,60p' apps/web/src/components/LocalErasurePanel.tsx`
  * Result: PASS - Local erasure imports and uses transient defaults.
  * Evidence: `resetSettings` hook calls `useSettingsStore.setState({ ...DEFAULT_SETTINGS, ...DEFAULT_TRANSIENT_SETTINGS })`.
* Command/check: `sed -n '80,140p' apps/web/src/lib/localErasure.ts && sed -n '323,389p' apps/web/src/lib/localErasure.ts`
  * Result: PASS - Erasure storage-removal and runtime-hook order inspected.
  * Evidence: Browser settings storage keys are removed by the storage boundary; runtime reset hooks run separately for runtime memory, so direct in-memory `setState` preserves final storage absence.
* UI product-surface check: N/A - Existing Local Erasure copy and visible controls were not changed.
* UI craft check: N/A - No rendered UI layout, labels, or interaction affordances changed.

**BQC Fixes**:

* State freshness on re-entry: Browser erasure now clears the new expansion state with all other transient settings (`apps/web/src/components/LocalErasurePanel.tsx`).

***

### Task T012 - Add focused settings store tests

**Started**: 2026-06-29 16:27 **Completed**: 2026-06-29 16:28 **Duration**: 1 minute

**Notes**:

* Added tests for default `null`, set, replace, clear, reset clearing, stale hydration ignore, and persistence exclusion.
* Kept tests on the real store and localStorage stub so behavior is proved through runtime store execution.

**Files Changed**:

* `apps/web/tests/useSettingsStore.test.ts` - Added bottom-rail expansion state coverage.
* `.spec_system/specs/phase21-session01-expansion-state-foundation/implementation-notes.md` - Logged task evidence.
* `.spec_system/specs/phase21-session01-expansion-state-foundation/tasks.md` - Marked focused store tests complete.

**Verification**:

* Command/check: `source ~/.nvm/nvm.sh && nvm use 26.2.0 >/dev/null && npm test -- apps/web/tests/useSettingsStore.test.ts`
  * Result: PASS - Focused settings store tests passed.
  * Evidence: Vitest reported `apps/web/tests/useSettingsStore.test.ts (14 tests)` and `14 passed`.
* UI product-surface check: N/A - Store tests only; no visible surface changed.
* UI craft check: N/A - Store tests only; no visible surface changed.

**BQC Fixes**:

* Contract alignment: Added runtime assertions for default, replacement, clear, reset, hydration, and persistence behavior (`apps/web/tests/useSettingsStore.test.ts`).

***

### Task T013 - Update settings reset-helper tests

**Started**: 2026-06-29 16:28 **Completed**: 2026-06-29 16:29 **Duration**: 1 minute

**Notes**:

* Updated settings notification and audio test setup to spread `DEFAULT_TRANSIENT_SETTINGS`.
* Kept drawer-open test setup as explicit overrides after transient defaults.

**Files Changed**:

* `apps/web/tests/settingsNotifications.test.ts` - Reset setup now includes transient defaults.
* `apps/web/tests/SettingsAudio.test.tsx` - Drawer reset setup now includes transient defaults before drawer-specific overrides.
* `.spec_system/specs/phase21-session01-expansion-state-foundation/implementation-notes.md` - Logged task evidence.
* `.spec_system/specs/phase21-session01-expansion-state-foundation/tasks.md` - Marked settings reset-helper tests complete.

**Verification**:

* Command/check: `rg "\\.\\.\\.DEFAULT_SETTINGS" apps/web/tests/settingsNotifications.test.ts apps/web/tests/SettingsAudio.test.tsx -n`
  * Result: PASS - Durable default spreads were inspected after edit.
  * Evidence: Remaining durable spreads in these files are paired with `...DEFAULT_TRANSIENT_SETTINGS`.
* Command/check: `source ~/.nvm/nvm.sh && nvm use 26.2.0 >/dev/null && npm test -- apps/web/tests/settingsNotifications.test.ts apps/web/tests/SettingsAudio.test.tsx`
  * Result: PASS - Focused notification/audio tests passed.
  * Evidence: Vitest reported 2 files passed and 14 tests passed.
* UI product-surface check: N/A - Test reset helpers only; no visible surface changed.
* UI craft check: N/A - Test reset helpers only; no visible surface changed.

**BQC Fixes**:

* State freshness on re-entry: Settings-related tests now reset the expansion state with other transient settings (`apps/web/tests/settingsNotifications.test.ts`, `apps/web/tests/SettingsAudio.test.tsx`).

***

### Task T014 - Update shell, shortcut, command, notice, roster, and notification reset helpers

**Started**: 2026-06-29 16:29 **Completed**: 2026-06-29 16:30 **Duration**: 1 minute

**Notes**:

* Updated the remaining task-listed reset helpers to spread `DEFAULT_TRANSIENT_SETTINGS`.
* Removed manual duplicate overlay reset lists where the canonical transient defaults cover the same state.

**Files Changed**:

* `apps/web/tests/CockpitShell.test.tsx` - Reset setup now uses transient defaults.
* `apps/web/tests/MobileAccessibility.test.tsx` - Reset setup now uses transient defaults.
* `apps/web/tests/KeyboardShortcutsModal.test.tsx` - Reset setup now uses transient defaults.
* `apps/web/tests/CommandPalette.test.tsx` - Reset setup now uses transient defaults.
* `apps/web/tests/keyboardShortcuts.test.ts` - Reset setup now uses transient defaults.
* `apps/web/tests/NoticeBoard.test.tsx` - Reset setup now uses transient defaults with severity override.
* `apps/web/tests/HeroRosterSort.test.tsx` - Reset setup now uses transient defaults.
* `apps/web/tests/useNotifications.test.tsx` - Reset setup now uses transient defaults.
* `.spec_system/specs/phase21-session01-expansion-state-foundation/implementation-notes.md` - Logged task evidence.
* `.spec_system/specs/phase21-session01-expansion-state-foundation/tasks.md` - Marked broad reset-helper tests complete.

**Verification**:

* Command/check: `rg "\\.\\.\\.DEFAULT_SETTINGS" apps/web/tests/CockpitShell.test.tsx apps/web/tests/MobileAccessibility.test.tsx apps/web/tests/KeyboardShortcutsModal.test.tsx apps/web/tests/CommandPalette.test.tsx apps/web/tests/keyboardShortcuts.test.ts apps/web/tests/NoticeBoard.test.tsx apps/web/tests/HeroRosterSort.test.tsx apps/web/tests/useNotifications.test.tsx -n`
  * Result: PASS - Remaining durable default spreads inspected.
  * Evidence: Remaining target resets are paired with `...DEFAULT_TRANSIENT_SETTINGS`.
* Command/check: `source ~/.nvm/nvm.sh && nvm use 26.2.0 >/dev/null && npm test -- apps/web/tests/CockpitShell.test.tsx apps/web/tests/MobileAccessibility.test.tsx apps/web/tests/KeyboardShortcutsModal.test.tsx apps/web/tests/CommandPalette.test.tsx apps/web/tests/keyboardShortcuts.test.ts apps/web/tests/NoticeBoard.test.tsx apps/web/tests/HeroRosterSort.test.tsx apps/web/tests/useNotifications.test.tsx`
  * Result: PASS - Broad reset-helper test group passed.
  * Evidence: Vitest reported 8 files passed and 144 tests passed.
* UI product-surface check: N/A - Test reset helpers only; no visible surface changed.
* UI craft check: N/A - Test reset helpers only; no visible surface changed.

**BQC Fixes**:

* State freshness on re-entry: Shell, shortcut, command, notice, roster, and notification tests now clear expansion state with other transient settings (`apps/web/tests`).

***

### Task T015 - Run focused settings tests

**Started**: 2026-06-29 16:30 **Completed**: 2026-06-29 16:31 **Duration**: 1 minute

**Notes**:

* Ran the required focused settings test command after store and reset-helper updates.

**Files Changed**:

* `.spec_system/specs/phase21-session01-expansion-state-foundation/implementation-notes.md` - Logged test evidence.
* `.spec_system/specs/phase21-session01-expansion-state-foundation/tasks.md` - Marked focused settings test gate complete.

**Verification**:

* Command/check: `source ~/.nvm/nvm.sh && nvm use 26.2.0 >/dev/null && npm test -- apps/web/tests/useSettingsStore.test.ts apps/web/tests/settingsNotifications.test.ts apps/web/tests/SettingsAudio.test.tsx`
  * Result: PASS - Focused settings tests passed.
  * Evidence: Vitest reported 3 files passed and 28 tests passed.
* UI product-surface check: N/A - Automated store/settings tests only; no visible new surface rendered.
* UI craft check: N/A - Automated store/settings tests only; no visible new surface rendered.

***

### Task T016 - Run shell and modal reset-helper tests

**Started**: 2026-06-29 16:31 **Completed**: 2026-06-29 16:32 **Duration**: 1 minute

**Notes**:

* Ran the required shell and modal reset-helper test command after reset-helper updates.

**Files Changed**:

* `.spec_system/specs/phase21-session01-expansion-state-foundation/implementation-notes.md` - Logged test evidence.
* `.spec_system/specs/phase21-session01-expansion-state-foundation/tasks.md` - Marked shell/modal test gate complete.

**Verification**:

* Command/check: `source ~/.nvm/nvm.sh && nvm use 26.2.0 >/dev/null && npm test -- apps/web/tests/CockpitShell.test.tsx apps/web/tests/MobileAccessibility.test.tsx apps/web/tests/KeyboardShortcutsModal.test.tsx apps/web/tests/CommandPalette.test.tsx`
  * Result: PASS - Shell and modal reset-helper tests passed.
  * Evidence: Vitest reported 4 files passed and 54 tests passed.
* UI product-surface check: PASS - Component tests rendered existing shell/modal routes only and did not expose new debug/runtime/scaffolding copy.
* UI craft check: PASS - Existing shell/modal tests covering names, focus, and local-only controls passed with no UI layout code changes in this task.

***

### Task T017 - Run keyboard, notice, roster, and notification reset-leakage tests

**Started**: 2026-06-29 16:32 **Completed**: 2026-06-29 16:33 **Duration**: 1 minute

**Notes**:

* Ran the required keyboard, notice, roster, and notification reset-leakage test command.

**Files Changed**:

* `.spec_system/specs/phase21-session01-expansion-state-foundation/implementation-notes.md` - Logged test evidence.
* `.spec_system/specs/phase21-session01-expansion-state-foundation/tasks.md` - Marked reset-leakage test gate complete.

**Verification**:

* Command/check: `source ~/.nvm/nvm.sh && nvm use 26.2.0 >/dev/null && npm test -- apps/web/tests/keyboardShortcuts.test.ts apps/web/tests/NoticeBoard.test.tsx apps/web/tests/HeroRosterSort.test.tsx apps/web/tests/useNotifications.test.tsx`
  * Result: PASS - Keyboard, notice, roster, and notification tests passed.
  * Evidence: Vitest reported 4 files passed and 90 tests passed.
* UI product-surface check: PASS - Component tests rendered existing Notice Board/roster/keyboard paths only and passed without new product-surface copy.
* UI craft check: PASS - Existing interaction and accessibility-oriented tests passed with no UI layout code changes in this task.

***

### Task T018 - Run web typecheck and ASCII/LF validation

**Started**: 2026-06-29 16:33 **Completed**: 2026-06-29 16:35 **Duration**: 2 minutes

**Notes**:

* Ran Biome formatting on changed TypeScript and TSX files before final checks.
* Normalized pre-existing non-ASCII comment characters in touched test files so all session outputs satisfy the ASCII requirement.
* Ran final web workspace typecheck, ASCII validation, and CRLF validation on session-touched files.

**Files Changed**:

* `apps/web/tests/settingsNotifications.test.ts` - Normalized a non-ASCII comment dash in a touched file.
* `apps/web/tests/HeroRosterSort.test.tsx` - Normalized non-ASCII comment arrows and dash in a touched file.
* `.spec_system/specs/phase21-session01-expansion-state-foundation/implementation-notes.md` - Logged final verification evidence.
* `.spec_system/specs/phase21-session01-expansion-state-foundation/tasks.md` - Marked final gate and completion checklist complete.

**Verification**:

* Command/check: `source ~/.nvm/nvm.sh && nvm use 26.2.0 >/dev/null && npx biome format --write apps/web/src/store/useSettingsStore.ts apps/web/src/components/LocalErasurePanel.tsx apps/web/tests/useSettingsStore.test.ts apps/web/tests/settingsNotifications.test.ts apps/web/tests/SettingsAudio.test.tsx apps/web/tests/CockpitShell.test.tsx apps/web/tests/MobileAccessibility.test.tsx apps/web/tests/KeyboardShortcutsModal.test.tsx apps/web/tests/CommandPalette.test.tsx apps/web/tests/keyboardShortcuts.test.ts apps/web/tests/NoticeBoard.test.tsx apps/web/tests/HeroRosterSort.test.tsx apps/web/tests/useNotifications.test.tsx`
  * Result: PASS - Formatting completed.
  * Evidence: Biome reported 13 files formatted and fixed 1 file.
* Command/check: `source ~/.nvm/nvm.sh && nvm use 26.2.0 >/dev/null && npm run typecheck --workspace @factionos/web`
  * Result: PASS - Web typecheck passed on final files.
  * Evidence: `tsc -b --noEmit` exited successfully.
* Command/check: `rg --pcre2 -n "[^\\x00-\\x7F]" <session-touched files>`
  * Result: PASS - No non-ASCII characters remain in session-touched files.
  * Evidence: Command exited with no matches.
* Command/check: `rg -n $'\\r' <session-touched files>`
  * Result: PASS - No CRLF line endings found in session-touched files.
  * Evidence: Command exited with no matches.
* UI product-surface check: N/A - Final verification only; no visible surface changed.
* UI craft check: N/A - Final verification only; no visible surface changed.

***

## Session Completion Summary

* Completed all 18 implementation tasks for `phase21-session01-expansion-state-foundation`.
* Added canonical transient bottom-rail expansion state in `useSettingsStore`.
* Updated browser erasure and test reset helpers so expansion state cannot leak.
* Added and ran focused store coverage for default, set, replace, clear, reset, hydration ignore, and persistence exclusion.
* Next workflow handoff is `creview`.
* Remaining blockers: none.


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