Use per-exchange PWA names and logos for instance app installs.

Show Binance/OKX/Gate 交易系统 with distinct exchange icons in manifests, apple titles, and login branding.

Co-authored-by: Cursor <cursoragent@cursor.com>

crypto_monitor_okx/app.py

@@ -6451,7 +6451,11 @@ def login():
             return redirect("/")
         else:
             flash("账号或密码错误")
-    return render_template("login.html", exchange_display=EXCHANGE_DISPLAY_NAME)
+    return render_template(
+        "login.html",
+        exchange_display=EXCHANGE_DISPLAY_NAME,
+        pwa_app_name="OKX 交易系统",
+    )
 
 @app.route("/logout")
 def logout():