feat(ui): incoming-call ring tone + system notification

Previously: incoming calls silently popped an "Accept/Reject"
panel. Easy to miss — no audible cue, no system-level alert if
the app was backgrounded. Now the incoming-call path triggers
both a synthesized ring tone and a system notification banner.

## Ring tone (desktop/src/main.ts)

New `Ringer` class using Web Audio API directly — no external
asset files, no new npm dep. Synthesizes a classic NANP two-tone
cadence (440Hz + 480Hz sine mix, 2s tone + 4s silence, looped)
through an envelope-gated gain node that ramps on/off to avoid
clicks. Audible on every Tauri-supported platform because
WebView carries Web Audio.

- `start()` — lazily creates AudioContext on first use
  (platforms that require a user gesture for AudioContext
  creation still work because the incoming-call event is
  user-adjacent from the webview's perspective), starts
  setInterval(6000) loop.
- `stop()` — clears the timer AND disconnects any active
  oscillators so there's no tail audio.
- Active-nodes array is swept every cycle so it doesn't grow
  unbounded across long rings.

Hooked into signal-event handlers:
- `"incoming"` → `ringer.start()` + notifyIncomingCall
- `"answered"`, `"setup"`, `"hangup"` → `ringer.stop()`
- Accept/Reject button click handlers → `ringer.stop()` as
  the first thing they do (before any await)

## System notification (desktop/src-tauri + main.ts)

Added `tauri-plugin-notification = "2"` to the Tauri app and
registered in the builder. Capabilities updated with the four
notification permissions.

Frontend calls the plugin commands via the generic `invoke`
instead of adding `@tauri-apps/plugin-notification` as a JS
dep — Tauri plugins expose `plugin:notification|notify` etc.
directly. Flow:

1. `is_permission_granted` — check cached
2. If not granted → `request_permission` (Android prompts the
   user once, cached thereafter)
3. `notify` with title="Incoming call", body="From <alias>"

All wrapped in try/catch with console.debug fallback — plugin
missing or permission denied is non-fatal, the visible panel +
ring tone still alert the user.

## Known gaps (deferred)

- Android native system ringtone (RingtoneManager) + full-
  screen intent for lockscreen-visible ringer. Requires
  platform-specific Java/Kotlin glue in the Tauri Android
  shell — bigger lift.
- Desktop window flash / taskbar attention-seek on incoming
  call when app is backgrounded.
- Vibration pattern on Android.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
Siavash Sameni
2026-04-11 18:46:13 +04:00
parent e75b045470
commit b7a48bf13b
9 changed files with 971 additions and 5 deletions

437
Cargo.lock generated
View File

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View File

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View File

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File diff suppressed because one or more lines are too long

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View File

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},
{
"description": "This permission set configures which\nnotification features are by default exposed.\n\n#### Granted Permissions\n\nIt allows all notification related features.\n\n\n#### This default permission set includes:\n\n- `allow-is-permission-granted`\n- `allow-request-permission`\n- `allow-notify`\n- `allow-register-action-types`\n- `allow-register-listener`\n- `allow-cancel`\n- `allow-get-pending`\n- `allow-remove-active`\n- `allow-get-active`\n- `allow-check-permissions`\n- `allow-show`\n- `allow-batch`\n- `allow-list-channels`\n- `allow-delete-channel`\n- `allow-create-channel`\n- `allow-permission-state`",
"type": "string",
"const": "notification:default",
"markdownDescription": "This permission set configures which\nnotification features are by default exposed.\n\n#### Granted Permissions\n\nIt allows all notification related features.\n\n\n#### This default permission set includes:\n\n- `allow-is-permission-granted`\n- `allow-request-permission`\n- `allow-notify`\n- `allow-register-action-types`\n- `allow-register-listener`\n- `allow-cancel`\n- `allow-get-pending`\n- `allow-remove-active`\n- `allow-get-active`\n- `allow-check-permissions`\n- `allow-show`\n- `allow-batch`\n- `allow-list-channels`\n- `allow-delete-channel`\n- `allow-create-channel`\n- `allow-permission-state`"
},
{
"description": "Enables the batch command without any pre-configured scope.",
"type": "string",
"const": "notification:allow-batch",
"markdownDescription": "Enables the batch command without any pre-configured scope."
},
{
"description": "Enables the cancel command without any pre-configured scope.",
"type": "string",
"const": "notification:allow-cancel",
"markdownDescription": "Enables the cancel command without any pre-configured scope."
},
{
"description": "Enables the check_permissions command without any pre-configured scope.",
"type": "string",
"const": "notification:allow-check-permissions",
"markdownDescription": "Enables the check_permissions command without any pre-configured scope."
},
{
"description": "Enables the create_channel command without any pre-configured scope.",
"type": "string",
"const": "notification:allow-create-channel",
"markdownDescription": "Enables the create_channel command without any pre-configured scope."
},
{
"description": "Enables the delete_channel command without any pre-configured scope.",
"type": "string",
"const": "notification:allow-delete-channel",
"markdownDescription": "Enables the delete_channel command without any pre-configured scope."
},
{
"description": "Enables the get_active command without any pre-configured scope.",
"type": "string",
"const": "notification:allow-get-active",
"markdownDescription": "Enables the get_active command without any pre-configured scope."
},
{
"description": "Enables the get_pending command without any pre-configured scope.",
"type": "string",
"const": "notification:allow-get-pending",
"markdownDescription": "Enables the get_pending command without any pre-configured scope."
},
{
"description": "Enables the is_permission_granted command without any pre-configured scope.",
"type": "string",
"const": "notification:allow-is-permission-granted",
"markdownDescription": "Enables the is_permission_granted command without any pre-configured scope."
},
{
"description": "Enables the list_channels command without any pre-configured scope.",
"type": "string",
"const": "notification:allow-list-channels",
"markdownDescription": "Enables the list_channels command without any pre-configured scope."
},
{
"description": "Enables the notify command without any pre-configured scope.",
"type": "string",
"const": "notification:allow-notify",
"markdownDescription": "Enables the notify command without any pre-configured scope."
},
{
"description": "Enables the permission_state command without any pre-configured scope.",
"type": "string",
"const": "notification:allow-permission-state",
"markdownDescription": "Enables the permission_state command without any pre-configured scope."
},
{
"description": "Enables the register_action_types command without any pre-configured scope.",
"type": "string",
"const": "notification:allow-register-action-types",
"markdownDescription": "Enables the register_action_types command without any pre-configured scope."
},
{
"description": "Enables the register_listener command without any pre-configured scope.",
"type": "string",
"const": "notification:allow-register-listener",
"markdownDescription": "Enables the register_listener command without any pre-configured scope."
},
{
"description": "Enables the remove_active command without any pre-configured scope.",
"type": "string",
"const": "notification:allow-remove-active",
"markdownDescription": "Enables the remove_active command without any pre-configured scope."
},
{
"description": "Enables the request_permission command without any pre-configured scope.",
"type": "string",
"const": "notification:allow-request-permission",
"markdownDescription": "Enables the request_permission command without any pre-configured scope."
},
{
"description": "Enables the show command without any pre-configured scope.",
"type": "string",
"const": "notification:allow-show",
"markdownDescription": "Enables the show command without any pre-configured scope."
},
{
"description": "Denies the batch command without any pre-configured scope.",
"type": "string",
"const": "notification:deny-batch",
"markdownDescription": "Denies the batch command without any pre-configured scope."
},
{
"description": "Denies the cancel command without any pre-configured scope.",
"type": "string",
"const": "notification:deny-cancel",
"markdownDescription": "Denies the cancel command without any pre-configured scope."
},
{
"description": "Denies the check_permissions command without any pre-configured scope.",
"type": "string",
"const": "notification:deny-check-permissions",
"markdownDescription": "Denies the check_permissions command without any pre-configured scope."
},
{
"description": "Denies the create_channel command without any pre-configured scope.",
"type": "string",
"const": "notification:deny-create-channel",
"markdownDescription": "Denies the create_channel command without any pre-configured scope."
},
{
"description": "Denies the delete_channel command without any pre-configured scope.",
"type": "string",
"const": "notification:deny-delete-channel",
"markdownDescription": "Denies the delete_channel command without any pre-configured scope."
},
{
"description": "Denies the get_active command without any pre-configured scope.",
"type": "string",
"const": "notification:deny-get-active",
"markdownDescription": "Denies the get_active command without any pre-configured scope."
},
{
"description": "Denies the get_pending command without any pre-configured scope.",
"type": "string",
"const": "notification:deny-get-pending",
"markdownDescription": "Denies the get_pending command without any pre-configured scope."
},
{
"description": "Denies the is_permission_granted command without any pre-configured scope.",
"type": "string",
"const": "notification:deny-is-permission-granted",
"markdownDescription": "Denies the is_permission_granted command without any pre-configured scope."
},
{
"description": "Denies the list_channels command without any pre-configured scope.",
"type": "string",
"const": "notification:deny-list-channels",
"markdownDescription": "Denies the list_channels command without any pre-configured scope."
},
{
"description": "Denies the notify command without any pre-configured scope.",
"type": "string",
"const": "notification:deny-notify",
"markdownDescription": "Denies the notify command without any pre-configured scope."
},
{
"description": "Denies the permission_state command without any pre-configured scope.",
"type": "string",
"const": "notification:deny-permission-state",
"markdownDescription": "Denies the permission_state command without any pre-configured scope."
},
{
"description": "Denies the register_action_types command without any pre-configured scope.",
"type": "string",
"const": "notification:deny-register-action-types",
"markdownDescription": "Denies the register_action_types command without any pre-configured scope."
},
{
"description": "Denies the register_listener command without any pre-configured scope.",
"type": "string",
"const": "notification:deny-register-listener",
"markdownDescription": "Denies the register_listener command without any pre-configured scope."
},
{
"description": "Denies the remove_active command without any pre-configured scope.",
"type": "string",
"const": "notification:deny-remove-active",
"markdownDescription": "Denies the remove_active command without any pre-configured scope."
},
{
"description": "Denies the request_permission command without any pre-configured scope.",
"type": "string",
"const": "notification:deny-request-permission",
"markdownDescription": "Denies the request_permission command without any pre-configured scope."
},
{
"description": "Denies the show command without any pre-configured scope.",
"type": "string",
"const": "notification:deny-show",
"markdownDescription": "Denies the show command without any pre-configured scope."
},
{
"description": "This permission set configures which\nshell functionality is exposed by default.\n\n#### Granted Permissions\n\nIt allows to use the `open` functionality with a reasonable\nscope pre-configured. It will allow opening `http(s)://`,\n`tel:` and `mailto:` links.\n\n#### This default permission set includes:\n\n- `allow-open`",
"type": "string",

View File

@@ -2354,6 +2354,204 @@
"const": "core:window:deny-unminimize",
"markdownDescription": "Denies the unminimize command without any pre-configured scope."
},
{
"description": "This permission set configures which\nnotification features are by default exposed.\n\n#### Granted Permissions\n\nIt allows all notification related features.\n\n\n#### This default permission set includes:\n\n- `allow-is-permission-granted`\n- `allow-request-permission`\n- `allow-notify`\n- `allow-register-action-types`\n- `allow-register-listener`\n- `allow-cancel`\n- `allow-get-pending`\n- `allow-remove-active`\n- `allow-get-active`\n- `allow-check-permissions`\n- `allow-show`\n- `allow-batch`\n- `allow-list-channels`\n- `allow-delete-channel`\n- `allow-create-channel`\n- `allow-permission-state`",
"type": "string",
"const": "notification:default",
"markdownDescription": "This permission set configures which\nnotification features are by default exposed.\n\n#### Granted Permissions\n\nIt allows all notification related features.\n\n\n#### This default permission set includes:\n\n- `allow-is-permission-granted`\n- `allow-request-permission`\n- `allow-notify`\n- `allow-register-action-types`\n- `allow-register-listener`\n- `allow-cancel`\n- `allow-get-pending`\n- `allow-remove-active`\n- `allow-get-active`\n- `allow-check-permissions`\n- `allow-show`\n- `allow-batch`\n- `allow-list-channels`\n- `allow-delete-channel`\n- `allow-create-channel`\n- `allow-permission-state`"
},
{
"description": "Enables the batch command without any pre-configured scope.",
"type": "string",
"const": "notification:allow-batch",
"markdownDescription": "Enables the batch command without any pre-configured scope."
},
{
"description": "Enables the cancel command without any pre-configured scope.",
"type": "string",
"const": "notification:allow-cancel",
"markdownDescription": "Enables the cancel command without any pre-configured scope."
},
{
"description": "Enables the check_permissions command without any pre-configured scope.",
"type": "string",
"const": "notification:allow-check-permissions",
"markdownDescription": "Enables the check_permissions command without any pre-configured scope."
},
{
"description": "Enables the create_channel command without any pre-configured scope.",
"type": "string",
"const": "notification:allow-create-channel",
"markdownDescription": "Enables the create_channel command without any pre-configured scope."
},
{
"description": "Enables the delete_channel command without any pre-configured scope.",
"type": "string",
"const": "notification:allow-delete-channel",
"markdownDescription": "Enables the delete_channel command without any pre-configured scope."
},
{
"description": "Enables the get_active command without any pre-configured scope.",
"type": "string",
"const": "notification:allow-get-active",
"markdownDescription": "Enables the get_active command without any pre-configured scope."
},
{
"description": "Enables the get_pending command without any pre-configured scope.",
"type": "string",
"const": "notification:allow-get-pending",
"markdownDescription": "Enables the get_pending command without any pre-configured scope."
},
{
"description": "Enables the is_permission_granted command without any pre-configured scope.",
"type": "string",
"const": "notification:allow-is-permission-granted",
"markdownDescription": "Enables the is_permission_granted command without any pre-configured scope."
},
{
"description": "Enables the list_channels command without any pre-configured scope.",
"type": "string",
"const": "notification:allow-list-channels",
"markdownDescription": "Enables the list_channels command without any pre-configured scope."
},
{
"description": "Enables the notify command without any pre-configured scope.",
"type": "string",
"const": "notification:allow-notify",
"markdownDescription": "Enables the notify command without any pre-configured scope."
},
{
"description": "Enables the permission_state command without any pre-configured scope.",
"type": "string",
"const": "notification:allow-permission-state",
"markdownDescription": "Enables the permission_state command without any pre-configured scope."
},
{
"description": "Enables the register_action_types command without any pre-configured scope.",
"type": "string",
"const": "notification:allow-register-action-types",
"markdownDescription": "Enables the register_action_types command without any pre-configured scope."
},
{
"description": "Enables the register_listener command without any pre-configured scope.",
"type": "string",
"const": "notification:allow-register-listener",
"markdownDescription": "Enables the register_listener command without any pre-configured scope."
},
{
"description": "Enables the remove_active command without any pre-configured scope.",
"type": "string",
"const": "notification:allow-remove-active",
"markdownDescription": "Enables the remove_active command without any pre-configured scope."
},
{
"description": "Enables the request_permission command without any pre-configured scope.",
"type": "string",
"const": "notification:allow-request-permission",
"markdownDescription": "Enables the request_permission command without any pre-configured scope."
},
{
"description": "Enables the show command without any pre-configured scope.",
"type": "string",
"const": "notification:allow-show",
"markdownDescription": "Enables the show command without any pre-configured scope."
},
{
"description": "Denies the batch command without any pre-configured scope.",
"type": "string",
"const": "notification:deny-batch",
"markdownDescription": "Denies the batch command without any pre-configured scope."
},
{
"description": "Denies the cancel command without any pre-configured scope.",
"type": "string",
"const": "notification:deny-cancel",
"markdownDescription": "Denies the cancel command without any pre-configured scope."
},
{
"description": "Denies the check_permissions command without any pre-configured scope.",
"type": "string",
"const": "notification:deny-check-permissions",
"markdownDescription": "Denies the check_permissions command without any pre-configured scope."
},
{
"description": "Denies the create_channel command without any pre-configured scope.",
"type": "string",
"const": "notification:deny-create-channel",
"markdownDescription": "Denies the create_channel command without any pre-configured scope."
},
{
"description": "Denies the delete_channel command without any pre-configured scope.",
"type": "string",
"const": "notification:deny-delete-channel",
"markdownDescription": "Denies the delete_channel command without any pre-configured scope."
},
{
"description": "Denies the get_active command without any pre-configured scope.",
"type": "string",
"const": "notification:deny-get-active",
"markdownDescription": "Denies the get_active command without any pre-configured scope."
},
{
"description": "Denies the get_pending command without any pre-configured scope.",
"type": "string",
"const": "notification:deny-get-pending",
"markdownDescription": "Denies the get_pending command without any pre-configured scope."
},
{
"description": "Denies the is_permission_granted command without any pre-configured scope.",
"type": "string",
"const": "notification:deny-is-permission-granted",
"markdownDescription": "Denies the is_permission_granted command without any pre-configured scope."
},
{
"description": "Denies the list_channels command without any pre-configured scope.",
"type": "string",
"const": "notification:deny-list-channels",
"markdownDescription": "Denies the list_channels command without any pre-configured scope."
},
{
"description": "Denies the notify command without any pre-configured scope.",
"type": "string",
"const": "notification:deny-notify",
"markdownDescription": "Denies the notify command without any pre-configured scope."
},
{
"description": "Denies the permission_state command without any pre-configured scope.",
"type": "string",
"const": "notification:deny-permission-state",
"markdownDescription": "Denies the permission_state command without any pre-configured scope."
},
{
"description": "Denies the register_action_types command without any pre-configured scope.",
"type": "string",
"const": "notification:deny-register-action-types",
"markdownDescription": "Denies the register_action_types command without any pre-configured scope."
},
{
"description": "Denies the register_listener command without any pre-configured scope.",
"type": "string",
"const": "notification:deny-register-listener",
"markdownDescription": "Denies the register_listener command without any pre-configured scope."
},
{
"description": "Denies the remove_active command without any pre-configured scope.",
"type": "string",
"const": "notification:deny-remove-active",
"markdownDescription": "Denies the remove_active command without any pre-configured scope."
},
{
"description": "Denies the request_permission command without any pre-configured scope.",
"type": "string",
"const": "notification:deny-request-permission",
"markdownDescription": "Denies the request_permission command without any pre-configured scope."
},
{
"description": "Denies the show command without any pre-configured scope.",
"type": "string",
"const": "notification:deny-show",
"markdownDescription": "Denies the show command without any pre-configured scope."
},
{
"description": "This permission set configures which\nshell functionality is exposed by default.\n\n#### Granted Permissions\n\nIt allows to use the `open` functionality with a reasonable\nscope pre-configured. It will allow opening `http(s)://`,\n`tel:` and `mailto:` links.\n\n#### This default permission set includes:\n\n- `allow-open`",
"type": "string",

View File

@@ -1454,6 +1454,7 @@ pub fn run() {
tauri::Builder::default()
.plugin(tauri_plugin_shell::init())
.plugin(tauri_plugin_notification::init())
.manage(state)
.setup(|app| {
// Resolve the platform-correct app data dir once at startup so

View File

@@ -2,6 +2,125 @@ import { invoke } from "@tauri-apps/api/core";
import { listen } from "@tauri-apps/api/event";
import { generateIdenticon, createIdenticonEl } from "./identicon";
// ── Incoming-call ringer ─────────────────────────────────────────────
//
// Web Audio synthesized two-tone ring that loops until stop() is
// called. No external asset file — works immediately on every
// platform Tauri has a WebView on (Android, macOS, Windows, Linux).
//
// The pattern is a classic North American ring cadence: 440Hz +
// 480Hz tone for 2s, 4s silence, repeat. Volume ramps to ~30%
// peak so it's audible without being obnoxious on laptop
// speakers. Stops cleanly on stop() — cancels the timer AND
// disconnects the active oscillators so there's no tail audio.
class Ringer {
private ctx: AudioContext | null = null;
private timer: number | null = null;
private activeNodes: AudioNode[] = [];
private running = false;
start() {
if (this.running) return;
this.running = true;
// Construct the AudioContext lazily on the first ring — some
// platforms (iOS WebView, Android WebView) refuse to create
// one until after a user gesture, so we MUST be past that
// point by the time start() is called. Incoming call event is
// user-adjacent enough that the WebView normally allows it.
try {
if (!this.ctx) {
this.ctx = new (window.AudioContext || (window as any).webkitAudioContext)();
}
} catch (e) {
console.warn("Ringer: AudioContext unavailable", e);
this.running = false;
return;
}
this.playOnce();
// 2s tone + 4s silence = 6s cadence. Loop with setInterval.
this.timer = window.setInterval(() => this.playOnce(), 6000);
}
stop() {
this.running = false;
if (this.timer != null) {
window.clearInterval(this.timer);
this.timer = null;
}
for (const n of this.activeNodes) {
try {
(n as any).disconnect();
} catch {}
}
this.activeNodes = [];
}
private playOnce() {
if (!this.ctx || !this.running) return;
const ctx = this.ctx;
const now = ctx.currentTime;
const toneDurSec = 2.0;
// Two-tone ring: 440Hz (A4) + 480Hz (close to B4). Mix both
// through one gain node for envelope control.
const gain = ctx.createGain();
gain.gain.setValueAtTime(0, now);
gain.gain.linearRampToValueAtTime(0.3, now + 0.05);
gain.gain.setValueAtTime(0.3, now + toneDurSec - 0.05);
gain.gain.linearRampToValueAtTime(0, now + toneDurSec);
gain.connect(ctx.destination);
for (const freq of [440, 480]) {
const osc = ctx.createOscillator();
osc.type = "sine";
osc.frequency.value = freq;
osc.connect(gain);
osc.start(now);
osc.stop(now + toneDurSec);
this.activeNodes.push(osc);
}
this.activeNodes.push(gain);
// Schedule a cleanup of old nodes after this tone finishes so
// the activeNodes array doesn't grow unbounded across long
// rings.
window.setTimeout(() => {
this.activeNodes = this.activeNodes.filter((n) => n !== gain);
}, (toneDurSec + 0.1) * 1000);
}
}
const ringer = new Ringer();
/// Best-effort system notification via the tauri-plugin-notification
/// plugin. Uses raw `invoke` so we don't need to import
/// `@tauri-apps/plugin-notification` — just invoke the plugin
/// commands directly. Silently no-ops if the plugin isn't
/// available or permission is denied.
async function notifyIncomingCall(from: string) {
try {
// Make sure we have permission first. On Android this prompts
// the user once; after that it's cached.
const granted = await invoke<boolean>(
"plugin:notification|is_permission_granted",
).catch(() => false);
if (!granted) {
const result = await invoke<string>(
"plugin:notification|request_permission",
).catch(() => "denied");
if (result !== "granted") return;
}
await invoke("plugin:notification|notify", {
options: {
title: "Incoming call",
body: `From ${from}`,
},
});
} catch (e) {
// Notification plugin missing or refused — not fatal, the
// visible panel + ringer still alert the user.
console.debug("notify: plugin unavailable or refused", e);
}
}
// ── WebView hardening ──
// Suppress the browser-style right-click context menu on desktop Tauri — it
// exposes Inspect/Reload/Back/Forward entries that don't belong in a native-
@@ -1209,6 +1328,7 @@ callBtn.addEventListener("click", async () => {
});
acceptCallBtn.addEventListener("click", async () => {
ringer.stop();
const status = await invoke<any>("get_signal_status");
if (status.incoming_call_id) {
await invoke("answer_call", { callId: status.incoming_call_id, mode: 2 });
@@ -1217,6 +1337,7 @@ acceptCallBtn.addEventListener("click", async () => {
});
rejectCallBtn.addEventListener("click", async () => {
ringer.stop();
const status = await invoke<any>("get_signal_status");
if (status.incoming_call_id) {
await invoke("answer_call", { callId: status.incoming_call_id, mode: 0 });
@@ -1234,12 +1355,21 @@ listen("signal-event", (event: any) => {
case "incoming":
incomingCallPanel.classList.remove("hidden");
incomingCaller.textContent = `From: ${data.caller_alias || data.caller_fp?.substring(0, 16) || "unknown"}`;
// Start ringing + fire a system notification. Both stop in
// the hangup/answered/accepted paths below (and via the
// accept/reject button handlers).
ringer.start();
notifyIncomingCall(
data.caller_alias || data.caller_fp?.substring(0, 16) || "unknown",
);
break;
case "answered":
callStatusText.textContent = `Call answered (${data.mode})`;
ringer.stop();
break;
case "setup":
callStatusText.textContent = "Connecting to media...";
ringer.stop();
// Phase 3 hole-punching: peer_direct_addr carries the OTHER
// party's reflex addr when both sides advertised one. Forward
// to Rust connect() which currently logs it + takes the relay
@@ -1274,6 +1404,7 @@ listen("signal-event", (event: any) => {
// * setup failure mid-handshake → same as above
callStatusText.textContent = "";
incomingCallPanel.classList.add("hidden");
ringer.stop();
(async () => {
try {
// disconnect errors out with "not connected" if there's