Fix template errors: Starlette new API + remove hx-headers escaping

- TemplateResponse now uses (request, name, context) signature for Starlette 0.36+
- Replace per-button hx-headers with global htmx:configRequest token injection in base.html
- Fix JS cookie regex to handle leading semicolons correctly

Tested: login, auth redirect, profile create/view/delete all return correct status codes.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

manager/main.py

@@ -66,13 +66,13 @@ def _redirect_if_unauth(request: Request):
 
 @app.get("/login", response_class=HTMLResponse)
 async def login_page(request: Request):
-    return TEMPLATES.TemplateResponse("login.html", {"request": request})
+    return TEMPLATES.TemplateResponse(request, "login.html")
 
 
 @app.post("/login")
 async def login(request: Request, token: str = Form(...)):
     if token != AUTH_TOKEN:
-        return TEMPLATES.TemplateResponse("login.html", {"request": request, "error": "Invalid token"})
+        return TEMPLATES.TemplateResponse(request, "login.html", {"error": "Invalid token"})
     resp = RedirectResponse("/", status_code=303)
     resp.set_cookie("token", token, httponly=True, samesite="lax")
     return resp
@@ -95,8 +95,7 @@ async def index(request: Request):
     for p in all_profiles:
         p["running"] = pm.is_running(p["id"])
         p["config"] = json.loads(p.get("config") or "{}")
-    return TEMPLATES.TemplateResponse("index.html", {
-        "request": request,
+    return TEMPLATES.TemplateResponse(request, "index.html", {
         "profiles": all_profiles,
         "bot_types": pm.BOT_TYPES,
     })
@@ -115,8 +114,7 @@ async def profile_page(request: Request, profile_id: int):
     contacts = bot.contacts if bot else []
     groups = bot.groups if bot else []
     log_lines = bot.log_lines[-50:] if bot else []
-    return TEMPLATES.TemplateResponse("profile.html", {
-        "request": request,
+    return TEMPLATES.TemplateResponse(request, "profile.html", {
         "profile": profile,
         "contacts": contacts,
         "groups": groups,