feat: character system v2 — schema upgrade, memory system, per-character TTS routing

Character schema v2: background, dialogue_style, appearance, skills, gaze_presets
with automatic v1→v2 migration. LLM-assisted character creation via Character MCP
server. Two-tier memory system (personal per-character + general shared) with
budget-based injection into LLM system prompt. Per-character TTS voice routing via
state file — Wyoming TTS server reads active config to route between Kokoro (local)
and ElevenLabs (cloud PCM 24kHz). Dashboard: memories page, conversation history,
character profile on cards, auto-TTS engine selection from character config.
Also includes VTube Studio expression bridge and ComfyUI API guide.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

homeai-dashboard/src/hooks/useActiveCharacter.js

@@ -0,0 +1,28 @@
+import { useState, useEffect } from 'react'
+
+const ACTIVE_KEY = 'homeai_active_character'
+
+export function useActiveCharacter() {
+  const [character, setCharacter] = useState(null)
+
+  useEffect(() => {
+    const activeId = localStorage.getItem(ACTIVE_KEY)
+    if (!activeId) return
+
+    fetch(`/api/characters/${activeId}`)
+      .then(r => r.ok ? r.json() : null)
+      .then(profile => {
+        if (profile) {
+          setCharacter({
+            id: profile.id,
+            name: profile.data.display_name || profile.data.name || 'AI',
+            image: profile.image || null,
+            tts: profile.data.tts || null,
+          })
+        }
+      })
+      .catch(() => {})
+  }, [])
+
+  return character
+}