Fix snap chromium path collapsing to /usr/bin/snap

readlink/realpath of /snap/bin/chromium becomes /usr/bin/snap, which is
not a browser and breaks DrissionPage launch. Keep the snap wrapper path,
reject snap host basenames, and prefer real deb chromium binaries.

register_cli.py

@@ -69,16 +69,36 @@ def _patched_create_browser_options():
         except Exception:
             browser_path = None
     if not browser_path:
+        normalize = getattr(reg, "_normalize_browser_path", None)
         for cand in (
             "/usr/bin/chromium",
             "/usr/bin/chromium-browser",
-            "/snap/bin/chromium",
+            "/usr/lib/chromium/chromium",
+            "/snap/bin/chromium",  # keep wrapper path; never /usr/bin/snap
             "/usr/bin/google-chrome-stable",
             "/usr/bin/google-chrome",
         ):
-            if os.path.isfile(cand) or os.path.islink(cand):
+            if callable(normalize):
+                norm = normalize(cand)
+                if norm:
+                    browser_path = norm
+                    break
+            elif os.path.isfile(cand) or os.path.islink(cand):
+                # refuse snap host binary
+                if os.path.basename(cand) == "snap":
+                    continue
                 browser_path = cand
                 break
+    # Final sanitize: never pass /usr/bin/snap to DrissionPage
+    if browser_path and os.path.basename(str(browser_path)) in ("snap", "snap-confine", "snapd"):
+        print(f"[browser] reject invalid path={browser_path!r}, re-resolve", flush=True)
+        browser_path = None
+        resolve = getattr(reg, "resolve_browser_path", None)
+        if callable(resolve):
+            try:
+                browser_path = resolve()
+            except Exception:
+                browser_path = None
     if browser_path:
         try:
             opts.set_browser_path(browser_path)