Land preserved DMX output + app-shell/UITests work (preservation/plotforge-dmx-20260711)

docs/dmx-smoke-evidence/2026-06-30-sacn/README.md

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+# PlotForge D4 sACN Hardware Smoke Evidence
+
+Date: 2026-06-30
+
+Status: scaffold only; sACN hardware run pending
+
+## Required Files
+
+- [ ] `relay.log` — output from `npm run dmx:relay`
+- [ ] `capture.pcap` or `capture.pcapng` — sACN UDP packet capture on port 5568
+- [ ] `node-ui.png` — screenshot of sACN node receive/output UI
+- [ ] `fixture-video.mov` or `fixture-video.mp4` — optional, required for fixture verified status
+
+## Hardware
+
+- Protocol: sACN
+- Node:
+- Node firmware:
+- Node IP:
+- Network interface:
+- Fixture or dimmer:
+- DMX universe/address:
+
+## Results
+
+- [ ] No output before arming
+- [ ] Arm succeeds
+- [ ] Selected fixture intensity test works
+- [ ] Blackout works
+- [ ] Bad target fails visibly
+- [ ] Network disconnect faults visibly
+- [ ] Relay crash or tab failure faults and blacks out
+- [ ] Blackout recovery works
+
+## Evidence Notes
+
+Record packet count, node UI status, fixture behavior, unicast or multicast mode, and any failures here before marking D4 verified.

docs/dmx-smoke-evidence/2026-06-30/README.md

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+# PlotForge D3 Hardware Smoke Evidence
+
+Date: 2026-06-30
+
+Status: scaffold only; hardware run pending
+
+## Required Files
+
+- [ ] `relay.log` — output from `npm run dmx:relay`
+- [ ] `capture.pcap` or `capture.pcapng` — Art-Net UDP packet capture
+- [ ] `node-ui.png` — screenshot of Art-Net node receive/output UI
+- [ ] `fixture-video.mov` or `fixture-video.mp4` — optional, required for fixture verified status
+
+## Hardware
+
+- Protocol: Art-Net
+- Node:
+- Node firmware:
+- Node IP:
+- Network interface:
+- Fixture or dimmer:
+- DMX universe/address:
+
+## Results
+
+- [ ] No output before arming
+- [ ] Arm succeeds
+- [ ] Selected fixture intensity test works
+- [ ] Blackout works
+- [ ] Bad target fails visibly
+- [ ] Network disconnect faults visibly
+- [ ] Relay crash or tab failure faults and blacks out
+- [ ] Blackout recovery works
+
+## Evidence Notes
+
+Record packet count, node UI status, fixture behavior, and any failures here before marking D3 verified.

docs/dmx-smoke-evidence/local/README.md

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+# PlotForge Local DMX Smoke Evidence
+
+Status: local pre-hardware proof only
+
+Run:
+
+```bash
+PATH=/opt/homebrew/opt/node@22/bin:$PATH npm run dmx:local-smoke
+```
+
+The script starts a loopback DMX relay, opens an authenticated WebSocket session, sends Art-Net and sACN unicast frames to a local UDP listener, and writes `local-smoke-latest.json`.
+
+This proves:
+
+- Relay `/health`.
+- Origin rejection.
+- No UDP before an authenticated frame command.
+- Bad target rejection without UDP.
+- 512-slot ArtDmx frame emission to a UDP listener.
+- Art-Net blackout burst all-zero frames.
+- 512-slot sACN frame emission to a UDP listener.
+- sACN blackout burst all-zero frames.
+- Heartbeat watchdog fault plus blackout.
+- Active client disconnect blackout.
+- Relay shutdown blackout.
+
+Controlled sACN multicast target derivation is covered by automated relay tests, not by this loopback smoke. Real multicast behavior still belongs in D4 hardware/network smoke.
+
+This does **not** satisfy D3 or D4 hardware verification. D3 still requires relay log, packet capture, node UI screenshot, and a real Art-Net fixture or dimmer result in `docs/dmx-smoke-evidence/2026-06-30/`. D4 still requires the same class of proof on a sACN-capable node.