fix: make SSL verification opt-in via config, extend fix to all platforms

- Add DISABLE_SSL_VERIFY = False to base_config.py (default: verification on)
- Add tools/httpx_util.py with make_async_client() factory that reads the config
- Replace all httpx.AsyncClient() call sites across all platforms (bilibili,
  weibo, zhihu, xhs, douyin, kuaishou) and crawler_util with make_async_client()
- Extends SSL fix to previously missed platforms: xhs, douyin, kuaishou

Users running behind an intercepting proxy can set DISABLE_SSL_VERIFY = True
in config/base_config.py. All other users retain certificate verification.

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

tools/crawler_util.py

@@ -37,6 +37,7 @@ from PIL import Image, ImageDraw, ImageShow
 from playwright.async_api import Cookie, Page
 
 from . import utils
+from .httpx_util import make_async_client
 
 
 async def find_login_qrcode(page: Page, selector: str) -> str:
@@ -47,7 +48,7 @@ async def find_login_qrcode(page: Page, selector: str) -> str:
         )
         login_qrcode_img = str(await elements.get_property("src"))  # type: ignore
         if "http://" in login_qrcode_img or "https://" in login_qrcode_img:
-            async with httpx.AsyncClient(follow_redirects=True, verify=False) as client:
+            async with make_async_client(follow_redirects=True) as client:
                 utils.logger.info(f"[find_login_qrcode] get qrcode by url:{login_qrcode_img}")
                 resp = await client.get(login_qrcode_img, headers={"User-Agent": get_user_agent()})
                 if resp.status_code == 200: