Add app shell with Euchre and Sequence, LAN/Bluetooth play

First vertical slice: the whole shell plus two games playable end to end,
so every layer is exercised before the other nine games are built on it.

Games
- Euchre: bowers, ordering up, dealer discard, going alone, stick the
  dealer, and full scoring. Rule variants (deck size, points to win,
  stick the dealer, going alone) are toggles in game setup.
- Sequence: two-eyed and one-eyed jacks, free corners, locked sequences,
  the shared-chip limit, and dead-card exchange. Teams, players per team
  and the sequence target are toggles.
- The board layout in SequenceBoard is generated, not the commercial
  board — it holds every structural property the rules need, but does not
  match a physical board. Documented in docs/RULES-sequence.md.

Multiplayer
- One transport abstraction over newline-delimited JSON, implemented
  twice: LAN via NSD discovery and TCP, Bluetooth via Classic RFCOMM.
  A lobby advertises on both at once, so a table can mix them.
- Host-authoritative: clients send move intents, the host re-validates
  every one against the rules, and each client receives a state redacted
  for its own seat so hidden information never crosses the wire.
- Seats start as AI and are handed to people as they join, which is what
  makes any mix of humans and AI work without a separate code path.

Shell
- Main menu lists all eleven games; the nine without engines are marked
  coming soon and are driven entirely by GameCatalog.
- Settings: sound, animation speed (one multiplier drives card movement
  and AI thinking time), and OTA updates from the latest GitHub release.
- Layouts measure available space rather than assuming an orientation.

The game package is free of Android types, so the rules engines and AI
run under plain JUnit; 43 tests cover ranking, following suit, scoring,
sequence detection, redaction, wire round-trips and full random and AI
playthroughs.

Co-Authored-By: Claude Opus 5 <[email protected]>
Claude-Session: https://claude.ai/code/session_015qjfMiPUDshdKEUa6vxqzN

app/src/main/AndroidManifest.xml

@@ -0,0 +1,71 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools">
+
+    <!-- OTA updates from GitHub Releases, plus LAN play over TCP sockets. -->
+    <uses-permission android:name="android.permission.INTERNET" />
+    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
+    <!-- Network Service Discovery needs multicast to see hosts on the LAN. -->
+    <uses-permission android:name="android.permission.CHANGE_WIFI_MULTICAST_STATE" />
+    <!-- Lets the app hand a downloaded APK to the system installer. -->
+    <uses-permission android:name="android.permission.REQUEST_INSTALL_PACKAGES" />
+
+    <!-- Bluetooth. Android 12 (API 31) split the old catch-all permissions into
+         explicit SCAN/CONNECT/ADVERTISE, so the legacy pair is capped below 31
+         and the new trio is requested at runtime above it. neverForLocation
+         tells the system we aren't deriving physical location from scans, which
+         avoids dragging in the location permission on 12+. -->
+    <uses-permission android:name="android.permission.BLUETOOTH"
+        android:maxSdkVersion="30" />
+    <uses-permission android:name="android.permission.BLUETOOTH_ADMIN"
+        android:maxSdkVersion="30" />
+    <uses-permission android:name="android.permission.BLUETOOTH_SCAN"
+        android:usesPermissionFlags="neverForLocation"
+        tools:targetApi="s" />
+    <uses-permission android:name="android.permission.BLUETOOTH_CONNECT"
+        tools:targetApi="s" />
+    <uses-permission android:name="android.permission.BLUETOOTH_ADVERTISE"
+        tools:targetApi="s" />
+    <!-- Pre-31, Bluetooth discovery is gated behind location access. -->
+    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"
+        android:maxSdkVersion="30" />
+
+    <!-- Both radios are optional: the app is fully playable against AI without them. -->
+    <uses-feature android:name="android.hardware.bluetooth" android:required="false" />
+    <uses-feature android:name="android.hardware.wifi" android:required="false" />
+
+    <application
+        android:allowBackup="true"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:theme="@style/Theme.ProLibertateGames">
+
+        <!-- No fixed orientation: the UI adapts to portrait, landscape and
+             tablet widths. configChanges keeps Compose state across rotation
+             instead of tearing the activity down mid-hand. -->
+        <activity
+            android:name=".MainActivity"
+            android:exported="true"
+            android:label="@string/app_name"
+            android:configChanges="orientation|screenSize|screenLayout|smallestScreenSize|keyboardHidden|density">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+
+        <!-- Serves the downloaded APK to the package installer via a content URI. -->
+        <provider
+            android:name="androidx.core.content.FileProvider"
+            android:authorities="${applicationId}.fileprovider"
+            android:exported="false"
+            android:grantUriPermissions="true">
+            <meta-data
+                android:name="android.support.FILE_PROVIDER_PATHS"
+                android:resource="@xml/file_paths" />
+        </provider>
+    </application>
+
+</manifest>