feat: web switch for her inner voice (Dolphin/3090 | Qwen-32B/MI50 | Off)

Her introspection (reflect/think) voice is now switchable live from the web
settings, read each cycle by the dream loop — so Brian can flip it off the 3090
before gaming without touching config or restarting.

- memory: runtime key/value settings table + get_setting/set_setting.
- self_state: INTROSPECTION_MODES (dolphin=local/dolphin3:8b, mi50=Qwen-32B,
  off=paused) + introspection_target()/set_introspection_mode(); default "dolphin".
  reflect() resolves from the live setting and SKIPS entirely when off.
- thoughts.think(): same resolution + skip-when-off.
- server: GET/POST /settings/introspection.
- index.html: "Inner Voice (introspection)" selector in Settings, applies instantly.
- tests: routing (dolphin/mi50), off-skip for think + reflect. Suite 77, ruff clean.

Default = Dolphin on the 3090 (richer voice). Flip to MI50 or Off in Settings
before gaming — that was the GPU-contention culprit.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

lyra/web/server.py

@@ -243,6 +243,21 @@ def create_app() -> FastAPI:
     async def journal_data(limit: int = 300) -> dict:
         return {"entries": memory.list_journal(limit=limit)}
 
+    @app.get("/settings/introspection")
+    async def get_introspection() -> dict:
+        """Current introspection (her inner voice) routing + the available options."""
+        tgt = self_state.introspection_target()
+        return {"mode": tgt["mode"],
+                "options": [{"key": k, "label": v["label"]}
+                            for k, v in self_state.INTROSPECTION_MODES.items()]}
+
+    @app.post("/settings/introspection")
+    async def set_introspection(request: Request) -> dict:
+        """Switch her inner voice: dolphin (3090) | mi50 (gaming-safe) | off."""
+        b = await request.json()
+        ok = await asyncio.to_thread(self_state.set_introspection_mode, b.get("mode", ""))
+        return {"ok": ok, "mode": self_state.introspection_target()["mode"]}
+
     @app.get("/thoughts")
     async def thoughts_page() -> FileResponse:
         """Lyra's thought loop — threads she's been turning over, and a place to reply."""