Phase 995: document settings mesh embed extract (v0.8.962)

Roadmap Phase 995 complete (47/50). Updated MESH_STABILITY, testing,
module index, and release notes for multi-device settings mesh UI
parity extract. Non-breaking refactor documentation only.

Co-authored-by: Cursor <[email protected]>

release_notes/RELEASE_v0.8.962.md

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+# Release v0.8.962 — Phase 995: Mesh Stability UI Multi-Device Settings Mesh Embed Keys Extract
+
+**Date:** 2026-06-05
+**Type:** Non-breaking refactor — mesh stability UI parity hardening
+
+## Summary
+
+Phase 995 extracts the multi-device settings mesh status paragraph and sync button
+from `app.js` into dedicated platform keys and UI modules — strings and markup
+unchanged.
+
+## New Modules
+
+### `pearcord-platform/mesh-stability-ui-settings-mesh-keys.js`
+
+- 4 field keys (`topic`, `peers`, `lastRemoteDeviceId`, `lastRemoteUpdatedAt`) + 3 embed parts
+- Sync button id constant (`btn-sync-settings-mesh`)
+- `buildMeshStabilitySettingsMeshSnapshot()`
+
+### `apps/pearcord/ui/mesh-stability-ui-settings-mesh.js`
+
+- `formatMeshStabilitySettingsMeshStatusLine()` — topic/peers/last-remote copy
+- `buildMeshStabilitySettingsMeshDiagnosticsEmbedHtml()` — conditional settings mesh embed
+
+## Test Coverage
+
+- `smoke-mesh-stability-ui-settings-mesh-build.cjs` — keys + UI embed
+- `smoke-phase995-boot-gate.cjs` — version check (0.8.962)
+- `smoke-agentctl-mesh-stability-ui-settings-mesh-journey-stub.cjs` — agentctl stub
+- `test:mesh-stability-stats` — extended with settings mesh snapshot assertions
+- `test:gossip-rpc-pull-unit` — extended with settings mesh embed part keys
+- `test:ci-phase995` — full CI bundle
+
+## Version
+
+`0.8.961` → `0.8.962`