docs(project): refresh baseline verification artifacts

Check in the PM product requirements, refreshed QA acceptance evidence, shared execution split plans, and current-phase status notes so the repo matches the current delivery baseline.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

plans/2026-03-31-frontend-demo-state-hardening.md

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+# Frontend Demo-State Hardening
+
+Date: 2026-03-31 UTC
+Owner: Senior Frontend Engineer
+Scope: `desktop-v1` frontend hardening only
+
+## Context
+
+- `apps/desktop` is already the active frontend entry and contains the current four-zone Redis operator workspace.
+- PM scope on 2026-03-31 did not approve new `desktop-v1` features such as `Add Key`, bilingual UI, or a visual refresh.
+- Browser dev mode remains the primary shell-review path when Tauri runtime is unavailable.
+
+## Problem
+
+- In browser demo mode, the UI currently claims string save and TTL actions succeeded, but the visible mock key state does not update.
+- That mismatch weakens shell review because browser-mode interaction feedback is less trustworthy even though it is explicitly demo-only.
+
+## Decision
+
+- Do not expand product scope.
+- Keep the existing workspace information architecture and current visual system.
+- Harden browser demo mode so session-local mock interactions update the visible browser, inspector, and command context consistently.
+
+## Planned Implementation
+
+1. Replace static demo key usage in `apps/desktop/src/App.tsx` with local state derived from the existing seed data.
+2. Extract demo-state mutation helpers for:
+   - string value save
+   - TTL set
+   - TTL remove
+3. Add focused frontend tests for those helpers.
+4. Update shared run and QA docs to state that browser demo mode now supports session-local mock state changes, but still does not provide live Redis evidence.
+
+## Acceptance
+
+- In `pnpm run desktop:dev`, saving a string key updates the visible value surface and downstream mock command behavior for the current session.
+- In `pnpm run desktop:dev`, TTL set and TTL remove update the visible TTL badges and inspector state for the current session.
+- The UI continues to clearly distinguish browser demo fallback from live Tauri runtime.
+- `pnpm --filter @redis-gui/desktop test` and `pnpm run desktop:build` remain green.