UI readability pass and Bazaar in-app purchase bridge

- muted text #9e9ec0 -> #727299 (contrast 2.6 -> 4.5 on white); tab labels 11px
- map: chapter titles wrap to two lines instead of being cut off
- reduced-motion respected (MotionConfig + CSS), focus-visible ring,
  no pull-to-refresh, short vibration on correct/wrong answers
- src/lib/bazaar.ts: bridge to the Android WebView wrapper; checkout uses
  Bazaar IAP only inside that app, Zarinpal everywhere else (unchanged)
- android/: WebView wrapper with Poolakey; written but never built

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

android/app/src/main/AndroidManifest.xml

@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <uses-permission android:name="android.permission.INTERNET" />
+    <!-- برای لرزشِ کوتاهِ جوابِ درست/غلط (navigator.vibrate در WebView). -->
+    <uses-permission android:name="android.permission.VIBRATE" />
+
+    <!-- اندروید ۱۱+: بدونِ این، اپ نمی‌تواند سرویسِ پرداختِ بازار را پیدا کند. -->
+    <queries>
+        <package android:name="com.farsitel.bazaar" />
+    </queries>
+
+    <application
+        android:allowBackup="false"
+        android:label="@string/app_name"
+        android:supportsRtl="true"
+        android:theme="@style/Theme.Tadrisino">
+        <activity
+            android:name=".MainActivity"
+            android:configChanges="orientation|screenSize|keyboardHidden"
+            android:exported="true"
+            android:screenOrientation="portrait">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+</manifest>