feat(cortex): update chat/nudge flow, deepgram streaming and agenda form

Refines chat panel, nudge messages and artifact rendering, reworks
deepgram token/streaming handling, and adds test tooling deps
(playwright, cypress) to package.json.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

lib/cortex/nudge.ts

@@ -192,6 +192,22 @@ const DEFAULT_EXPIRY_MS = 5 * 60 * 1000;
  * In production, these would come from a database or configuration.
  */
 export const PROTOCOL_RULES: ProtocolRule[] = [
+  {
+    id: 'noshow-declarabel-check',
+    name: 'No Show declarabiliteitscheck',
+    trigger: {
+      intent: 'register_no_show',
+      conditions: [],
+    },
+    suggestion: {
+      intent: 'cancel_appointment',
+      message: 'Ik zie een declarabel consult in de agenda. Volgens inkoopvoorwaarden mag deze afspraak NIET gedeclareerd worden. Wil je dat ik deze annuleer als \'No Show\'?',
+      prefillEntities: (_source) => ({}),
+    },
+    priority: 'high',
+    enabled: true,
+    expiresAfterMs: DEFAULT_EXPIRY_MS,
+  },
   {
     id: 'wondzorg-controle',
     name: 'Wondcontrole na verzorging',