feat(desktop): add redis gui foundation baseline

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

plans/2026-03-28-frontend-smoke-validation.md

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+# Frontend Smoke Validation Snapshot
+
+Date: 2026-03-28 UTC
+Owner: Senior Frontend Engineer
+Related issues: HAC-9, HAC-11, HAC-15
+
+## Goal
+
+Revalidate the current desktop frontend and packaging path against the repository's shared smoke prerequisites.
+
+## Evidence Captured
+
+1. Passed: `cargo test -p redis-core`
+2. Passed: `pnpm run desktop:build`
+3. Passed: `./scripts/redis-fixture/start.sh`
+4. Passed: `./scripts/redis-fixture/seed.sh`
+5. Passed: `./scripts/redis-fixture/stop.sh`
+6. Partial pass: `pnpm run desktop:tauri:build`
+
+## Artifact Evidence
+
+- `target/release/bundle/deb/Redis GUI Foundation_0.1.0_amd64.deb`
+- `target/release/bundle/rpm/Redis GUI Foundation-0.1.0-1.x86_64.rpm`
+
+## Packaging Outcome
+
+- Tauri build completed the Linux release binary and produced `.deb` and `.rpm` artifacts.
+- The same run failed in the AppImage step with `io: Connection reset by peer (os error 104)`.
+
+## Remaining Gaps
+
+- No saved Tauri-window screenshots or interaction logs exist yet for live browse, edit, TTL, or command flows.
+- macOS and Windows package evidence remains absent.
+- AppImage packaging needs a separate rerun or targeted investigation if that bundle format is required.
+- This environment currently has no `DISPLAY`, `xvfb-run`, or desktop screenshot utility, so real-window visual evidence cannot be captured from this session alone.
+- The desktop shell now includes a copyable QA snapshot so smoke context can still be recorded as text when screenshots are unavailable.
+
+## Frontend Conclusion
+
+The current repository is beyond shell-only validation: backend tests, browser build, Redis fixture bootstrapping, and Linux package generation all succeed in this environment. The next frontend validation step should happen in a launchable Tauri desktop session so QA can capture visual evidence for the live bridge workflows.