live: drop events for channels already hung up; e2e waits for the page

Asterisk sends NewCallerid after a Local;1 channel's Hangup, which re-created
the channel and left a ghost ringing call on the dashboard. Only Newchannel
creates a channel now. The e2e waits that matched text also shown on the
previous page (now that the dashboard lists calls) wait for the route.

Task: M7-T4

apps/api/src/live/calls.test.ts

@@ -36,6 +36,15 @@ describe('CallTracker', () => {
     expect(seen.at(-1)).toBeNull();
   });
 
+  it('an event after Hangup does not bring the channel back', () => {
+    const t = new CallTracker(() => undefined);
+    const ch = { Channel: 'Local/600@sp-from-ext-00000005;1', Linkedid: '2.0', Uniqueid: '2.0' };
+    t.handle({ Event: 'Newchannel', ChannelStateDesc: 'Down', ...ch });
+    t.handle({ Event: 'Hangup', ...ch });
+    t.handle({ Event: 'NewCallerid', ChannelStateDesc: 'Up', CallerIDNum: '193', ...ch });
+    expect(t.list()).toEqual([]);
+  });
+
   it('loads calls already up from CoreShowChannels', () => {
     const t = new CallTracker(() => undefined);
     const ch = (Channel: string, extra: Record<string, string>) => ({

apps/api/src/live/calls.ts

@@ -84,6 +84,8 @@ export class CallTracker {
       case 'Newstate':
       case 'NewCallerid':
       case 'NewConnectedLine':
+        // Only Newchannel creates: Asterisk can send a NewCallerid after a channel's Hangup.
+        if (!this.channels.has(name)) return;
         this.upsert(m);
         break;
       case 'Newexten': {
@@ -116,7 +118,7 @@ export class CallTracker {
       case 'VarSet': {
         const v = field(m, 'Variable') ?? '';
         const value = field(m, 'Value') ?? '';
-        if (!/^(?:__)?SP_(?:DID|DIRECTION|REC)$/.test(v) || !linkedid) return;
+        if (!/^(?:__)?SP_(?:DID|DIRECTION|REC)$/.test(v) || !this.byLinkedid(linkedid).length) return;
         const x = this.extraOf(linkedid);
         if (v.endsWith('DID')) x.did = value || x.did;
         else if (v.endsWith('DIRECTION'))