Calmer shop with payment choice, step-by-step phone back, sound/haptics that reach the phone, live streak flame

- Shop: subscription perks shown once (each card repeated them, «۳ سوال در روز» twice), plans as selectable
  rows with one big buy button, prices as «۷۹۸ هزار تومان», a single clear status card for subscribers.
  Checkout inside the Bazaar app offers «کارتِ بانکی» (default) or «کافه‌بازار» for packs with a SKU;
  «به‌زودی در بازار» is gone. The gateway opens in the phone browser; status refreshes on return.
- Back button: every back-able level (open sheet, pushed screen, non-home tab, shop list) owns exactly one
  history entry created right after the tap; back closes the sheet, then the screen, then returns to Home,
  then leaves the app. (A re-pushed trap is skipped by Chrome's history intervention.)
- Sound: AudioContext unlocked on the first touch (it was created after a network wait, which WebView/Safari
  keep muted); softer notes, option tick, finish fanfare, streak whoosh. Haptics through the new
  TadrisinoAndroid.vibrate bridge when the APK has it, navigator.vibrate otherwise.
- Streak: animated flame with lit / at-risk (grey) / frozen (ice) states on Home and the streak screen,
  a companion reminder when the streak is at risk or frozen, and a full-screen «روزِ پیاپی» celebration
  after the first lesson of the day (needs backend 9024c6b: streak.activeToday / lost).
- Lessons: intro/example text with inline «۱. … ۲. …» renders as a numbered list (2,250 of 4,469 texts).
- Quiz: duplicate React key on the answer bubble fixed.
- android/MainActivity.kt: vibrate bridge and mediaPlaybackRequiresUserGesture=false. Not built; needs the
  next APK from the signing owner.

Checked in headless Chrome against the local backend (shop as a subscriber with the Bazaar bridge stubbed,
back sequences, quiz → streak celebration, frozen state). Not checked on a real phone or in the APK.

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

android/app/src/main/java/com/tadrisino/app/MainActivity.kt

@@ -3,7 +3,11 @@ package com.tadrisino.app
 import android.annotation.SuppressLint
 import android.content.Intent
 import android.net.Uri
+import android.os.Build
 import android.os.Bundle
+import android.os.VibrationEffect
+import android.os.Vibrator
+import android.os.VibratorManager
 import android.util.Log
 import android.webkit.JavascriptInterface
 import android.webkit.WebResourceRequest
@@ -16,6 +20,7 @@ import ir.cafebazaar.poolakey.Payment
 import ir.cafebazaar.poolakey.config.PaymentConfiguration
 import ir.cafebazaar.poolakey.config.SecurityCheck
 import ir.cafebazaar.poolakey.request.PurchaseRequest
+import org.json.JSONArray
 import org.json.JSONObject
 
 /**
@@ -54,6 +59,8 @@ class MainActivity : AppCompatActivity() {
         // WebView فقط آدرسِ وب را می‌خواند؛ دسترسی به فایل و content:// لازم نیست.
         webView.settings.allowFileAccess = false
         webView.settings.allowContentAccess = false
+        // صداهای کوتاهِ رابط (Web Audio) بعد از پاسخِ سرور پخش می‌شوند، نه درست در لحظه‌ی لمس.
+        webView.settings.mediaPlaybackRequiresUserGesture = false
         webView.webViewClient = object : WebViewClient() {
             // هر آدرسی بیرونِ دامنه‌ی خودمان در مرورگرِ گوشی باز می‌شود، نه داخلِ اپ؛ پس پل فقط
             // در صفحه‌های خودمان در دسترس است.
@@ -160,6 +167,32 @@ class MainActivity : AppCompatActivity() {
             }
         }
 
+        /**
+         * لرزشِ کوتاهِ رابط (src/lib/sound.tsِ فرانت). `navigator.vibrate` در همه‌ی WebViewها اجرا نمی‌شود؛
+         * این مستقیم از Vibratorِ گوشی است. ورودی آرایه‌ی JSON از میلی‌ثانیه‌ها: [لرزش، مکث، لرزش، …].
+         */
+        @JavascriptInterface
+        fun vibrate(patternJson: String) {
+            val pattern = try {
+                val arr = JSONArray(patternJson)
+                LongArray(arr.length()) { i -> arr.getLong(i).coerceIn(0, 1000) }
+            } catch (e: Exception) {
+                Log.w(TAG, "bad vibrate pattern", e)
+                return
+            }
+            if (pattern.isEmpty()) return
+            val vibrator = if (Build.VERSION.SDK_INT >= 31) {
+                (getSystemService(VIBRATOR_MANAGER_SERVICE) as VibratorManager).defaultVibrator
+            } else {
+                @Suppress("DEPRECATION")
+                getSystemService(VIBRATOR_SERVICE) as Vibrator
+            }
+            // [لرزش، مکث، …] → قالبِ اندروید که با مکث شروع می‌شود.
+            val timings = longArrayOf(0) + pattern
+            if (Build.VERSION.SDK_INT >= 26) vibrator.vibrate(VibrationEffect.createWaveform(timings, -1))
+            else @Suppress("DEPRECATION") vibrator.vibrate(timings, -1)
+        }
+
         @JavascriptInterface
         fun bazaarConsume(purchaseToken: String) {
             runOnUiThread {