feat: provider auth style selector & edit UX improvements

- Anthropic Third-party API: add API Key / Auth Token selector in connect dialog
  with proper extra_env injection and auth style detection
- Edit mode: reuse PresetConnectDialog for matched providers instead of generic
  ProviderForm, showing only relevant fields consistent with connect experience
- Edit mode: show masked key (dots) instead of empty field; switching auth style
  clears key and requires re-entry; switching back restores masked value
- Edit mode: expose headers_json, env_overrides_json, notes in advanced section
  so all fields remain visible and editable
- Edit mode: role_models_json merge logic preserves unseen roles (reasoning, small)
  while allowing clearing of visible mapping fields
- Dialog: add max-h-[calc(100vh-4rem)] + overflow-y-auto to DialogContent base;
  remove overflow-hidden from preset dialog so scrolling actually works
- Connected provider badge: detect ANTHROPIC_AUTH_TOKEN in extra_env to show
  correct "Auth Token" vs "API Key" label
- i18n: add provider.authToken, provider.authStyle keys (en + zh)
- Bump version to 0.31.0

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

Author: 7418

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "codepilot",
-  "version": "0.30.0",
+  "version": "0.31.0",
   "private": true,
   "workspaces": ["apps/*", "packages/*"],
   "author": {

package.json

@@ -95,7 +95,8 @@ export function ProviderForm({
       setName(provider.name);
       setProviderType(provider.provider_type);
       setBaseUrl(provider.base_url);
-      setApiKey("");
+      // Show masked key so user sees dots indicating a key exists
+      setApiKey(provider.api_key || "");
       setExtraEnv(provider.extra_env || "{}");
       setHeadersJson(provider.headers_json || "{}");
       setEnvOverridesJson(provider.env_overrides_json || "");
@@ -202,7 +203,7 @@ export function ProviderForm({
     }
   };
 
-  const isMaskedKey = mode === "edit" && provider?.api_key?.startsWith("***");
+  const isMaskedKey = mode === "edit" && apiKey?.startsWith("***");
 
   return (
     <Dialog open={open} onOpenChange={onOpenChange}>