docs: add voice-assistant system map (Archify HTML + Mermaid source)

docs/overview.md

@@ -103,4 +103,15 @@ Also fixed along the way: mopidy-local disabled (empty `library.db` crashed sear
 - `sam/voice_bridge` — STT bridge + whisper
 - `sam/speech_piper` — TTS scripts/models → Snapcast
 - `sam/voice-assistant` — **this** overview + API contract + clients
-- `sam/family_home_lab` — console portal / dsh
+- `sam/family_home_lab` — console portal / dsh
+---
+
+## Diagrams
+
+- **Interactive map** (Archify HTML, pan/zoom/search/dark-light): [`voice-assistant-map.html`](./voice-assistant-map.html)
+  - Published live: <https://maps.lab.audasmedia.com.au/homeassistant/docs/voice-assistant-map.html>
+- **Mermaid source**: [`voice-assistant.mmd`](./voice-assistant.mmd) · rendered **SVG**: [`diagrams/voice-assistant.svg`](./diagrams/voice-assistant.svg)
+- **Archify JSON IR** (single source of truth for the interactive map): [`archify/voice-assistant.architecture.json`](./archify/voice-assistant.architecture.json)
+
+> Regenerate the interactive map from the JSON:
+> `node ~/.agents/skills/archify/bin/archify.mjs deliver architecture docs/archify/voice-assistant.architecture.json docs/voice-assistant-map.html --quality showcase --json`