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>

lib/instance/instance_embed_lib.py

@@ -179,10 +179,21 @@ def register_embed_routes(
         return jsonify({"ok": True, "page": tab, "html": html})
 
 
+def pwa_app_name(exchange_key: str) -> str:
+    """安装 App / 主屏幕显示名(各所独立标识)."""
+    ex = (exchange_key or "").strip().lower()
+    return {
+        "binance": "Binance 交易系统",
+        "okx": "OKX 交易系统",
+        "gate": "Gate 交易系统",
+    }.get(ex, "交易系统")
+
+
 def embed_context_extras(exchange_key: str) -> dict:
     return {
         "order_rule_tips_tpl": order_rule_tips_template(exchange_key),
         "include_transfer_block": include_transfer_block(exchange_key),
         "ui_open_guard_enabled": ui_open_guard_enabled(exchange_key),
         "ui_orphan_recovery_enabled": ui_orphan_recovery_enabled(exchange_key),
+        "pwa_app_name": pwa_app_name(exchange_key),
     }