speaker: make AudioRoute a real Capacitor plugin PACKAGE so it registers (device log: has:0)

Device telemetry proved the app-embedded AudioRoute class never registered (not in
Capacitor.Plugins) — appending a CAPBridgedPlugin to AppDelegate.swift gets stripped/undiscovered
in release builds. The plugins that DO register (Share, Camera, Filesystem) are all npm packages
wired by cap sync. So AudioRoute is now a local plugin package (mobile/plugins/audio-route,
file: dep in mobile/package.json) with a podspec + CAPBridgedPlugin Swift — cap sync adds its pod
and Capacitor registers it like the others. load() sets the launch speaker default; setSpeaker({on})
overrides the output port. inject-audio.js no longer injects the plugin class (would duplicate);
it keeps only the AppDelegate launch default as a fallback.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

mobile/plugins/audio-route/AudioRoutePlugin.podspec

@@ -0,0 +1,17 @@
+require 'json'
+
+package = JSON.parse(File.read(File.join(__dir__, 'package.json')))
+
+Pod::Spec.new do |s|
+  s.name = 'AudioRoutePlugin'
+  s.version = package['version']
+  s.summary = package['description']
+  s.license = package['license']
+  s.homepage = 'https://bizgaze.com'
+  s.author = 'BizGaze'
+  s.source = { :git => 'https://bizgaze.com/audio-route.git', :tag => s.version.to_s }
+  s.source_files = 'ios/Sources/**/*.{swift,h,m}'
+  s.ios.deployment_target = '14.0'
+  s.dependency 'Capacitor'
+  s.swift_version = '5.1'
+end

mobile/plugins/audio-route/ios/Sources/AudioRoutePlugin/AudioRoutePlugin.swift

@@ -0,0 +1,35 @@
+import Foundation
+import Capacitor
+import AVFoundation
+
+// Earpiece <-> speaker toggle for calls. Registered by cap sync as a normal Capacitor plugin package, so it
+// appears as window.Capacitor.Plugins.AudioRoute (unlike an app-embedded class, which gets stripped/not
+// discovered in release builds). setSpeaker({on}) overrides the AVAudioSession output port.
+@objc(AudioRoutePlugin)
+public class AudioRoutePlugin: CAPPlugin, CAPBridgedPlugin {
+    public let identifier = "AudioRoutePlugin"
+    public let jsName = "AudioRoute"
+    public let pluginMethods: [CAPPluginMethod] = [
+        CAPPluginMethod(name: "setSpeaker", returnType: CAPPluginReturnPromise)
+    ]
+
+    override public func load() {
+        // Default calls to the loudspeaker when the plugin initialises (iOS uses the quiet earpiece otherwise).
+        let session = AVAudioSession.sharedInstance()
+        try? session.setCategory(.playAndRecord, mode: .voiceChat, options: [.defaultToSpeaker, .allowBluetooth, .allowBluetoothA2DP])
+        try? session.setActive(true)
+    }
+
+    @objc func setSpeaker(_ call: CAPPluginCall) {
+        let on = call.getBool("on") ?? true
+        let session = AVAudioSession.sharedInstance()
+        do {
+            try session.setCategory(.playAndRecord, mode: .voiceChat, options: [.allowBluetooth, .allowBluetoothA2DP])
+            try session.setActive(true)
+            try session.overrideOutputAudioPort(on ? .speaker : .none)
+            call.resolve(["route": on ? "speaker" : "earpiece"])
+        } catch {
+            call.reject(error.localizedDescription)
+        }
+    }
+}

mobile/plugins/audio-route/package.json

@@ -0,0 +1,26 @@
+{
+  "name": "audio-route",
+  "version": "1.0.0",
+  "description": "iOS earpiece/speaker audio route toggle for Biz Connect",
+  "main": "dist/plugin.cjs.js",
+  "module": "dist/esm/index.js",
+  "types": "dist/esm/index.d.ts",
+  "author": "BizGaze",
+  "license": "MIT",
+  "files": [
+    "dist/",
+    "ios/",
+    "AudioRoutePlugin.podspec"
+  ],
+  "capacitor": {
+    "ios": {
+      "src": "ios"
+    }
+  },
+  "devDependencies": {
+    "@capacitor/core": "^7.0.0"
+  },
+  "peerDependencies": {
+    "@capacitor/core": "^7.0.0"
+  }
+}