fix: P1 call-desk defects batch

- Mute persists across calls: sip-manager's "ended/failed" branch now
  resets the Recoil sipIsMutedAtom + sipIsOnHoldAtom (previously only
  the SIP track was unmuted, leaving the UI icon + toggle logic in a
  muted state that the next call inherited).
- Telephony-unavailable dial pad: call-desk.tsx dial-pad "Call" button
  was missing an isRegistered check in its disabled prop, so it stayed
  clickable when SIP was down. Button now shows "Telephony unavailable"
  and is disabled.
- Past dates in Follow-up: enquiry-form's follow-up date input had no
  min constraint. Switched to a raw <input type="date"> with min set
  to today's ISO date.
- Returning-patient AI summary during call: ai-chat-panel now auto-fires
  a "give me a quick summary of <caller>" request whenever the caller's
  leadId changes (new incoming call). Clears prior chat state so each
  caller starts fresh.
- Remove Type column in Patients page (Badge import also pruned).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/state/sip-manager.ts

@@ -13,6 +13,8 @@ type StateUpdater = {
     setCallState: (state: CallState) => void;
     setCallerNumber: (number: string | null) => void;
     setCallUcid: (ucid: string | null) => void;
+    setIsMuted: (muted: boolean) => void;
+    setIsOnHold: (onHold: boolean) => void;
 };
 
 let stateUpdater: StateUpdater | null = null;
@@ -83,7 +85,13 @@ export function connectSip(config: SIPConfig): void {
             if (ucid) stateUpdater?.setCallUcid(ucid);
 
             if (state === 'ended' || state === 'failed') {
-                sipClient?.unmute(); // clear any mute state so it doesn't persist to next call
+                // Reset both the SIP track AND the Recoil state — otherwise the
+                // UI icon + toggle-mute branch logic stay "muted" and the next
+                // call opens in a confusing half-muted state.
+                sipClient?.unmute();
+                sipClient?.unhold();
+                stateUpdater?.setIsMuted(false);
+                stateUpdater?.setIsOnHold(false);
                 outboundActive = false;
                 outboundPending = false;
             }