Add global autofill guard for hub, env, and transfer inputs.

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

manual_trading_hub/hub.py

@@ -777,6 +777,17 @@ _ACCOUNT_RISK_BADGE_CSS = _REPO_STATIC / "account_risk_badge.css"
 _ACCOUNT_RISK_BADGE_JS = _REPO_STATIC / "account_risk_badge.js"
 _OPTIONS_EXPIRY_COUNTDOWN_JS = _REPO_STATIC / "options_expiry_countdown.js"
 _OPTIONS_POSITION_CARDS_JS = _REPO_STATIC / "options_position_cards.js"
+_AUTOFILL_GUARD_JS = _REPO_STATIC / "autofill_guard.js"
+
+
+@app.get("/assets/autofill_guard.js")
+def hub_autofill_guard_js():
+    if not _AUTOFILL_GUARD_JS.is_file():
+        raise HTTPException(status_code=404, detail="autofill_guard.js not found")
+    return FileResponse(
+        str(_AUTOFILL_GUARD_JS),
+        media_type="application/javascript; charset=utf-8",
+    )
 
 
 @app.get("/assets/account_risk_badge.css")