feat: migrate to Capacitor wrapper for fully-offline Android

Replace the native Kotlin/Compose port with a Capacitor 8 wrapper around
the upstream loto SvelteKit PWA. Loto is consumed as a git submodule and
its static build is bundled into the APK at sync time. The wrapper has
no INTERNET permission, so fully offline is enforced rather than
conventional.

- loto/ submodule pinned to dfb1c1e
- android/ scaffolded by cap add android; signing wired via env vars
- All 184 voice MP3s + service worker bundled in assets/public/
- CI checkouts submodule, runs npm build, then Gradle inside android/
- Native port preserved in git history at e7fb3d0 and 8b8d46e

android/app/src/androidTest/java/com/miti99/loto/MainActivityComposeSmokeTest.kt

@@ -1,46 +0,0 @@
-package com.miti99.loto
-
-import androidx.compose.ui.test.assertCountEquals
-import androidx.compose.ui.test.junit4.createAndroidComposeRule
-import androidx.compose.ui.test.onAllNodesWithTag
-import androidx.compose.ui.test.onNodeWithText
-import androidx.compose.ui.test.performClick
-import androidx.test.ext.junit.runners.AndroidJUnit4
-import org.junit.Rule
-import org.junit.Test
-import org.junit.runner.RunWith
-
-/**
- * Compose UI smoke test — verifies the full cold-start → generate-grid flow.
- *
- * Requires a connected device or emulator. Run via:
- *   ./gradlew :app:connectedDebugAndroidTest
- *
- * Phase 11 spec: launch MainActivity, assert "Tạo bảng mới" shown,
- * click it, assert all 81 player_cell nodes are rendered.
- */
-@RunWith(AndroidJUnit4::class)
-class MainActivityComposeSmokeTest {
-
-    @get:Rule
-    val rule = createAndroidComposeRule<MainActivity>()
-
-    @Test
-    fun generate_button_is_visible_on_cold_start() {
-        rule.onNodeWithText("Tạo bảng mới").assertExists()
-    }
-
-    @Test
-    fun generate_button_creates_81_player_cells() {
-        // Tap the generate button — no confirmation dialog on first tap (grid is null)
-        rule.onNodeWithText("Tạo bảng mới").performClick()
-
-        // Wait up to 5 s for all 81 cells to appear (grid generation is synchronous
-        // but Compose may take a frame to recompose)
-        rule.waitUntil(timeoutMillis = 5_000) {
-            rule.onAllNodesWithTag("player_cell").fetchSemanticsNodes().size == 81
-        }
-
-        rule.onAllNodesWithTag("player_cell").assertCountEquals(81)
-    }
-}

android/app/src/main/AndroidManifest.xml

@@ -1,31 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<manifest xmlns:android="http://schemas.android.com/apk/res/android">
-
-    <uses-permission android:name="android.permission.VIBRATE" />
-
-    <application
-        android:name=".LotoApp"
-        android:allowBackup="false"
-        android:dataExtractionRules="@xml/backup_rules"
-        android:fullBackupContent="false"
-        android:icon="@mipmap/ic_launcher"
-        android:roundIcon="@mipmap/ic_launcher"
-        android:label="@string/app_name"
-        android:supportsRtl="false"
-        android:theme="@style/Theme.Loto">
-
-        <activity
-            android:name=".MainActivity"
-            android:exported="true"
-            android:configChanges="orientation|screenSize|keyboardHidden|uiMode"
-            android:screenOrientation="portrait"
-            android:theme="@style/Theme.Loto">
-            <intent-filter>
-                <action android:name="android.intent.action.MAIN" />
-                <category android:name="android.intent.category.LAUNCHER" />
-            </intent-filter>
-        </activity>
-
-    </application>
-
-</manifest>

android/app/src/main/assets/audio/manifest.json

@@ -1,16 +0,0 @@
-{
-  "voices": [
-    {
-      "id": "hoai-my",
-      "edgeName": "vi-VN-HoaiMyNeural",
-      "label": "Hoai My (nữ)",
-      "gender": "female"
-    },
-    {
-      "id": "nam-minh",
-      "edgeName": "vi-VN-NamMinhNeural",
-      "label": "Nam Minh (nam)",
-      "gender": "male"
-    }
-  ]
-}