feat: ambient AI visit scribe (record/paste → reviewed SOAP note)

Record a clinician↔patient visit (or paste a transcript) on the patient
sheet; the backend transcribes it (OpenAI Whisper / Gemini), de-identifies
the transcript + context through Veil, and drafts a structured SOAP note
the clinician reviews and edits before saving — the same write-approval
gate as the chat agent.

Backend: POST /api/scribe/{transcribe,draft,save} (routes/scribe.ts,
services/ai/transcribe.ts), veil.redactText() free-text redactor,
appendEncounter service, audio MIME types on attachments. Gated by
patient:write + the clinic AI policy (reception/disabled-AI excluded).
Frontend: ScribeDialog + lib/scribe.ts, "Record visit" on the patient
detail, gated by clinical access + AI availability. New `scribe` locale
namespace across all five languages. Bumps to v0.4.0.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

backend/src/index.ts

@@ -28,6 +28,7 @@ import { patientsRouter } from "./routes/patients.js";
 import { patientsWalletRouter } from "./routes/patients-wallet.js";
 import { portalRouter } from "./routes/portal.js";
 import { prescriptionsRouter } from "./routes/prescriptions.js";
+import { scribeRouter } from "./routes/scribe.js";
 import { settingsRouter } from "./routes/settings.js";
 import { signingRouter } from "./routes/signing.js";
 import { staffRouter } from "./routes/staff.js";
@@ -104,6 +105,7 @@ app.use("/api/notifications", notificationsRouter);
 app.use("/api/settings", settingsRouter);
 app.use("/api/ai", aiRouter);
 app.use("/api/chat", chatRouter);
+app.use("/api/scribe", scribeRouter);
 app.use("/api/integrations", integrationsRouter);
 app.use("/api/portal", portalRouter);
 app.use("/api/auth-helpers", authHelpersRouter);