feat: exhaustive feature expansion — cookie modes, DNS/WebRTC testers, map, Firefox fix

Cookie system:
- Expand from 5 to 12 fully-specified CookiePolicy modes in browser_identity.py
- Add CookiePolicy dataclass: behavior, lifetime, TCP partitioning, clearOnShutdown.*
- browser_profile.py emits full cookie pref set from policy object
- UI dropdown widened to 680px with live description label per mode

Firefox launch fix:
- Detect Firefox via Windows registry, AppData, and shutil.which
- Use DETACHED_PROCESS|CREATE_NO_WINDOW|CREATE_NEW_PROCESS_GROUP flags
- Wait up to 3s for firefox.exe in tasklist instead of polling parent pid
- taskkill on stop() to terminate all firefox.exe processes

DNS leak tester:
- dns_leak.py: FullDnsLeakReport dataclass, run_dns_leak_test comparing
  proxy DoH resolution vs direct system DNS

WebRTC tester:
- webrtc_check.py: STUN UDP probe, registry policy check, user.js pref check

Ban tester:
- Added SITES_SHOPPING, SITES_CRYPTO, SITES_DNS categories
- Parallel execution via ThreadPoolExecutor
- Expanded banned-text hint keywords

Fingerprint audit:
- OS identity checks: hostname, MAC, GUID, OS version, timezone, screen res
- Browser consistency analysis of user.js

Neon world map:
- world_map.png bundled; chain_map.py renders hop arcs over it with glow effect

Signup prep:
- Auto-save account on Open & Autofill; Copy Email / Copy Pass buttons
- Auto-fill custom URL when preset site selected
- PyInstaller-safe path resolution for signup_extension

Spec:
- Bundle signup_extension dir and world_map.png as PyInstaller data files

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

proxy_chain_manager/signup_prep.py

@@ -13,7 +13,16 @@ from typing import Any
 from .paths import app_data_dir
 
 _EXT_ID = "signup-autofill@proxygod"
-_EXT_SRC = Path(__file__).resolve().parent / "signup_extension"
+
+
+def _ext_src_path() -> Path:
+    """Locate the signup_extension dir whether running from source or frozen."""
+    import sys
+    if getattr(sys, "frozen", False) and hasattr(sys, "_MEIPASS"):
+        return Path(sys._MEIPASS) / "proxy_chain_manager" / "signup_extension"
+    return Path(__file__).resolve().parent / "signup_extension"
+
+
 
 
 @dataclass(frozen=True)
@@ -389,7 +398,7 @@ def install_signup_extension(profile_dir: Path, draft: SignupDraft) -> None:
     dest = profile_dir / "extensions" / ext_name
     if dest.exists():
         shutil.rmtree(dest, ignore_errors=True)
-    shutil.copytree(_EXT_SRC, dest)
+    shutil.copytree(_ext_src_path(), dest)
 
     cfg = build_autofill_config(draft)
     (dest / "autofill_config.json").write_text(json.dumps(cfg, indent=2), encoding="utf-8")