fix(gemini): improve settings sync and fix auth detection

Author: skulidropek

packages/lib/src/core/templates-entrypoint/gemini.ts

@@ -118,6 +118,15 @@ const nextSettings = {
   approvalPolicy: "never"
 }
 
+// Auto-detect auth method if not set
+if (!nextSettings.security.auth || !nextSettings.security.auth.selectedType) {
+  if (fs.existsSync(path.join(path.dirname(settingsPath), "oauth_creds.json"))) {
+    nextSettings.security.auth = { ...(nextSettings.security.auth || {}), selectedType: "oauth-personal" }
+  } else if (fs.existsSync(path.join(path.dirname(settingsPath), "..", ".api-key"))) {
+    nextSettings.security.auth = { ...(nextSettings.security.auth || {}), selectedType: "api-key" }
+  }
+}
+
 if (JSON.stringify(settings) !== JSON.stringify(nextSettings)) {
   fs.mkdirSync(path.dirname(settingsPath), { recursive: true })
   fs.writeFileSync(settingsPath, JSON.stringify(nextSettings, null, 2) + "\n")

packages/lib/src/usecases/auth-gemini.ts

@@ -317,7 +317,7 @@ export const authGeminiLoginOauth = (
           )
         )
 
-        // Pre-trust directories just in case the setting is ignored
+        // Pre-trust the container's home directory to skip interactive prompt
         const trustedFoldersPath = `${credentialsDir}/trustedFolders.json`
         yield* _(
           fs.writeFileString(
@@ -329,18 +329,6 @@ export const authGeminiLoginOauth = (
           )
         )
 
-        // Pre-create projects.json to avoid ENOENT during rename within the container
-        const projectsPath = `${credentialsDir}/projects.json`
-        yield* _(
-          fs.writeFileString(
-            projectsPath,
-            JSON.stringify({
-              projects: {},
-              byPath: {}
-            })
-          )
-        )
-
         yield* _(
           runGeminiOauthLoginWithPrompt(cwd, accountPath, {
             image: geminiImageName,