mavend: record which channel a quiet toggle arrived on

resolveQuietToggle runs inside runTurn, so mavweb /api/chat and telegram reach
it as well as the microphone. Every toggle was written with Source "tap:voice"
regardless, which left the facts table claiming a mic flipped a setting nobody
spoke to. This is the one function whose own doc comment calls it a
network-reachable way to change a daemon-wide setting, and provenance is the
first column read when asking why quiet mode is on.

runTurn now takes the channel it was entered from and the toggle writes it:
"tap:voice" from HandlePushToTalk, "tap:text" from handleText.

Found in review of #53.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01TrVSBKe3RFDF4fGYKWYQnX

cmd/mavend/quiet_toggle_test.go

@@ -79,7 +79,7 @@ func TestResolveQuietToggle(t *testing.T) {
 		t.Run(tc.text, func(t *testing.T) {
 			api := &quietFakeAPI{}
 			h := &reactiveHandler{api: api, now: func() time.Time { return time.Unix(0, 0).UTC() }}
-			reply, handled := h.resolveQuietToggle(context.Background(), tc.text)
+			reply, handled := h.resolveQuietToggle(context.Background(), tc.text, sourceVoice)
 
 			if tc.want == quietNone {
 				if handled || reply != "" {
@@ -147,3 +147,22 @@ func TestQuietToggleNegationIsNotAdjacency(t *testing.T) {
 		})
 	}
 }
+
+// TestQuietToggleRecordsTheChannelItArrivedOn — the toggle is reachable from
+// mavweb /api/chat and telegram, not only the microphone. Every write used to
+// be stamped "tap:voice", so a toggle typed into the web UI claimed a mic wrote
+// it and the provenance column lied about a daemon-wide setting.
+func TestQuietToggleRecordsTheChannelItArrivedOn(t *testing.T) {
+	for _, src := range []turnSource{sourceVoice, sourceText} {
+		t.Run(string(src), func(t *testing.T) {
+			api := &quietFakeAPI{}
+			h := &reactiveHandler{api: api, now: func() time.Time { return time.Unix(0, 0).UTC() }}
+			if _, handled := h.resolveQuietToggle(context.Background(), "тихий режим", src); !handled {
+				t.Fatal("expected the toggle to match")
+			}
+			if api.got.Source != string(src) {
+				t.Errorf("source = %q, want %q", api.got.Source, src)
+			}
+		})
+	}
+}