chore: mock-server fleet expansion + docs screenshot refresh pipeline

[robertsLando]

Summary

Two related parts: a richer mock-server fleet, and a Playwright-driven pipeline that uses it to regenerate the docs screenshots.

Mock-server fleet

• Adds a mock-server/ directory of 10 .cjs files / 31 mock nodes that npx mock-server merges at startup. Coverage: lighting (binary/dimmer/RGB/RGBW/fan), sensors (contact/temp+humidity/multi-sensor), notifications (motion/smoke/water/CO), locks (basic + keypad with full Schedule Entry Lock), thermostats (heat-only + HVAC), covers (shutter/blinds/garage), energy (electric/gas/solar w/ Energy Production CC), multi-channel (4-outlet strip + dual dimmer), misc (siren/indicator/scene controller/configurable parameters).
• Splits fake-stick into two scripts:
  • npm run fake-stick — single node, loaded straight from mock-server/002-window-covering-pinned.cjs (fast, deterministic; this is what the e2e workflow uses).
  • npm run fake-stick:fleet — the full 31-node fleet (the whole mock-server/ directory; for dev / screenshots).
• Removes the old single-node server_config.js — its node 2 (a Window Covering blinds device with User Code + Schedule Entry Lock) was duplicated by 002-window-covering-pinned.cjs. That fleet file is now the single source of truth and doubles as the single-node config.
• The e2e workflow (.github/workflows/test-application.yml) is unchanged: npm run fake-stick still resolves to one node, so CI interviews fast and the MQTT round-trip on node 2's Window Covering CC parameter 3 (zwave/nodeID_2/106/0/targetValue/3) behaves exactly as before.
• Updates the three .github/ instruction files and the AGENTS.md / CLAUDE.md quick-reference command lists for the two scripts.

Docs screenshot pipeline

• Adds the refresh-docs-screenshots Claude Code skill: SKILL.md orchestration + capture.mjs (Playwright/Chromium capture script) + manifest.json (per-image recipe: route, theme, viewport, dialog steps) + seed data (fakeNodes.seed.json, a zero-node mock-server stub, scenes.json). Playwright is isolated in the skill's own package.json/package-lock.json so the heavy Chromium download doesn't leak into every contributor's root npm install.
• Regenerates 14 PNGs under docs/_images/ with this tooling — control_panel, control_panel_dark, settings, settings_dark, debug, mesh_diagram, mesh-selected, route_health_result, nodes_manager, scenes, gateway_values_table, edit_gateway_value, config_updates_dialog, config_updates_icon. control_panel.png is new; the unused unknown-device.png is dropped.

Supporting code changes

• ZwaveClient.getNodeNeighbors — guard the getNode() result. It can be undefined (node removed mid-request, or a UI-only fake node), which previously threw on .protocol.
• NodePanel.refreshNodeNeighbors — the passive on-open neighbor refresh now passes infoSnack: false, errorSnack: false to apiRequest instead of wrapping the call in a bare swallow-everything try/catch, so it doesn't flash the per-request toast.
• ZwaveGraph.vue — exposes the vis-network instance on window.__zwGraph when localStorage.exposeZwaveGraph is set, so the capture script can deterministically select a mesh node (canvas hit-testing is non-deterministic under physics layout). No-op in normal usage.
• App.vue — listens for a zwave:dismiss-snackbars DOM event and clears all open toasts; capture.mjs fires it before each screenshot so transient snackbars never leak into a shot. No-op when the event is never dispatched.

Verification

• npm run fake-stick boots a single node from 002-window-covering-pinned.cjs; npm run fake-stick:fleet boots all 31 — both verified listening on tcp://:::5555.
• Node 2 keeps Window Covering CC parameter 3 (Outbound Right) supported, so the e2e MQTT round-trip is unaffected.
• npx eslint mock-server/ is clean.
• The 14 refreshed PNGs were produced by running capture.mjs end-to-end against the local stack.

Test plan

• CI green on chore: Test Application — the e2e workflow itself is untouched; npm run fake-stick still loads a single node, so this is a no-op for CI behavior.
• Review the refreshed docs/_images/*.png for visual correctness.
• Manually run npm run fake-stick:fleet + npm run dev:server + npm run dev and walk the Control Panel to confirm the fleet renders with realistic names/locations.

Out of scope (intentionally deferred)

• Re-recording the GIF / MP4 docs assets.
• Cleaning up orphan PNGs (troubleshoot_*.png) — needs a docs-content decision.

[coveralls]

Coverage Report for CI Build 26155599214

Coverage decreased (-1.0%) to 17.619%

Details

• Coverage decreased (-1.0%) from the base build.
• Patch coverage: 1349 uncovered changes across 14 files (0 of 1349 lines covered, 0.0%).
• No coverage regressions found.

Uncovered Changes

Top 10 Files by Coverage Impact	Changed	Covered	%
.claude/skills/refresh-docs-screenshots/capture.mjs	223	0	0.0%
mock-server/010-lighting.cjs	205	0	0.0%
mock-server/090-misc.cjs	149	0	0.0%
mock-server/030-notifications.cjs	117	0	0.0%
mock-server/040-locks.cjs	113	0	0.0%
mock-server/050-thermostats.cjs	103	0	0.0%
mock-server/080-multi-channel.cjs	100	0	0.0%
mock-server/070-energy.cjs	92	0	0.0%
mock-server/060-covers.cjs	90	0	0.0%
mock-server/020-sensors.cjs	86	0	0.0%

Coverage Regressions

No coverage regressions found.

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Coverage Stats

Relevant Lines:	24967
Covered Lines:	4142
Line Coverage:	16.59%
Relevant Branches:	466
Covered Branches:	339
Branch Coverage:	72.75%
Branches in Coverage %:	Yes
Coverage Strength:	1.06 hits per line

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💛 - Coveralls