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# Implementation Summary

**Session ID**: `phase21-session06-responsive-layout-and-accessibility-pass` **Package**: apps/web **Completed**: 2026-06-29 **Duration**: 0.8 hours

***

## Overview

Completed the responsive layout and practical accessibility pass for the shared bottom-rail focused surface. Quest Board, Orchestration, and War Room now use viewport-safe focused sizing, contained panel scrolling, lifecycle-scoped background scroll containment, and modal Tab/Shift+Tab focus containment while preserving one mounted implementation per panel.

***

## Deliverables

### Files Created

| File                                                                                                      | Purpose                                            | Lines |
| --------------------------------------------------------------------------------------------------------- | -------------------------------------------------- | ----- |
| `.spec_system/specs/phase21-session06-responsive-layout-and-accessibility-pass/spec.md`                   | Session specification                              | \~208 |
| `.spec_system/specs/phase21-session06-responsive-layout-and-accessibility-pass/tasks.md`                  | Session task checklist                             | \~74  |
| `.spec_system/specs/phase21-session06-responsive-layout-and-accessibility-pass/implementation-notes.md`   | Implementation evidence log                        | \~505 |
| `.spec_system/specs/phase21-session06-responsive-layout-and-accessibility-pass/browser-verification.md`   | Desktop and small viewport browser evidence ledger | \~101 |
| `.spec_system/specs/phase21-session06-responsive-layout-and-accessibility-pass/code-review.md`            | Code review and repair report                      | \~77  |
| `.spec_system/specs/phase21-session06-responsive-layout-and-accessibility-pass/security-compliance.md`    | Security and GDPR review                           | \~77  |
| `.spec_system/specs/phase21-session06-responsive-layout-and-accessibility-pass/validation.md`             | Validation report                                  | \~215 |
| `.spec_system/specs/phase21-session06-responsive-layout-and-accessibility-pass/IMPLEMENTATION_SUMMARY.md` | Completion summary                                 | \~70  |

### Files Modified

| File                                                                               | Changes                                                                                                                                                |
| ---------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------ |
| `apps/web/src/components/BottomRailExpansionHost.tsx`                              | Added viewport-safe focused shell/card/panel usage, background scroll containment, focusable collection, and modal Tab/Shift+Tab cycling.              |
| `apps/web/src/App.tsx`                                                             | Refined compact bottom-rail grid and host sizing for stable Quest Board, Orchestration, and War Room cells.                                            |
| `apps/web/src/components/Layout.tsx`                                               | Adjusted shell bottom-rail overflow and layout constraints for focused surfaces.                                                                       |
| `apps/web/src/index.css`                                                           | Added focused-surface sizing, scrolling, and responsive utility classes.                                                                               |
| `apps/web/tests/BottomRailExpansionHost.test.tsx`                                  | Added coverage for sizing classes, scroll-lock cleanup, focus containment, and higher-layer Escape behavior.                                           |
| `apps/web/tests/CockpitShell.test.tsx`                                             | Added real-shell coverage for the three focused surfaces, compact fallback, focus return, and single panel trees.                                      |
| `apps/web/tests/MobileAccessibility.test.tsx`                                      | Added practical focused-surface accessibility checks and no-certification boundaries.                                                                  |
| `tests/e2e/app.e2e.ts`                                                             | Added desktop/mobile browser checks for size, overlap, text fit, privacy-safe copy, keyboard containment, screenshots, Escape close, and focus return. |
| `.spec_system/state.json`                                                          | Marked Session 06 complete and cleared the active session.                                                                                             |
| `.spec_system/PRD/phase_21/PRD_phase_21.md`                                        | Updated Phase 21 progress to 6/7 sessions.                                                                                                             |
| `.spec_system/PRD/phase_21/session_06_responsive_layout_and_accessibility_pass.md` | Marked Session 06 complete.                                                                                                                            |
| `apps/web/package.json`                                                            | Bumped package version from 0.1.53 to 0.1.54.                                                                                                          |
| `package-lock.json`                                                                | Synchronized the `apps/web` workspace package version.                                                                                                 |

***

## Technical Decisions

1. **Focused sizing stays in the shared host**: The focused shell/card/panel classes keep all three surfaces independent of cockpit-grid clipping without duplicating panel implementations.
2. **Scroll and focus ownership is lifecycle-scoped**: The host captures and restores document/body scroll state and removes key listeners on close, surface switch, or unmount.
3. **Browser evidence remains practical local coverage**: The session records automated desktop/mobile proof without claiming formal WCAG, physical-device mobile, hosted validation, remote execution, or trusted erasure certification.

***

## Test Results

| Metric         | Value                  |
| -------------- | ---------------------- |
| Focused Tests  | 106 passed             |
| Shortcut Tests | 84 passed              |
| Root Tests     | 3159 passed, 1 skipped |
| App Playwright | 21 passed, 1 skipped   |
| Typecheck      | Web and workspace PASS |
| Lint           | PASS                   |
| Format Check   | PASS                   |
| Security Scan  | PASS                   |
| Coverage       | Not collected          |

***

## Lessons Learned

1. The same-instance focused surface contract scales better when modal sizing, scroll containment, and focus containment remain shell-level responsibilities.
2. Practical accessibility evidence needs both unit-level keyboard cleanup checks and browser-level geometry/text-fit checks because happy-dom cannot prove viewport framing.

***

## Future Considerations

Items for future sessions:

1. Session 07 should run final Phase 21 regression across the full focused-surface flow and stable docs.
2. Keep formal certification and hosted/runtime execution claims out of product copy unless a later source-backed phase adds evidence.

***

## Session Statistics

* **Tasks**: 18 completed
* **Files Created**: 8
* **Files Modified**: 13
* **Tests Added**: Focused regressions across 3 web test files and 1 app e2e file
* **Blockers**: 0 resolved


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