diff --git a/backend/app/api/v1/endpoints/agent_tasks.py b/backend/app/api/v1/endpoints/agent_tasks.py
index f278513..126b67d 100644
--- a/backend/app/api/v1/endpoints/agent_tasks.py
+++ b/backend/app/api/v1/endpoints/agent_tasks.py
@@ -292,6 +292,7 @@ async def _execute_agent_task(task_id: str):
             other_config = (user_config or {}).get('otherConfig', {})
             github_token = other_config.get('githubToken') or settings.GITHUB_TOKEN
             gitlab_token = other_config.get('gitlabToken') or settings.GITLAB_TOKEN
+            gitea_token = other_config.get('giteaToken') or settings.GITEA_TOKEN
 
             # 获取项目根目录（传递任务指定的分支和认证 token）
             # 🔥 传递 event_emitter 以发送克隆进度
@@ -301,6 +302,7 @@ async def _execute_agent_task(task_id: str):
                 task.branch_name,
                 github_token=github_token,
                 gitlab_token=gitlab_token,
+                gitea_token=gitea_token,  # 🔥 新增
                 event_emitter=event_emitter,  # 🔥 新增
             )
 
@@ -2213,6 +2215,7 @@ async def _get_project_root(
     branch_name: Optional[str] = None,
     github_token: Optional[str] = None,
     gitlab_token: Optional[str] = None,
+    gitea_token: Optional[str] = None,  # 🔥 新增
     event_emitter: Optional[Any] = None,  # 🔥 新增：用于发送实时日志
 ) -> str:
     """
@@ -2228,6 +2231,7 @@ async def _get_project_root(
         branch_name: 分支名称（仓库项目使用，优先于 project.default_branch）
         github_token: GitHub 访问令牌（用于私有仓库）
         gitlab_token: GitLab 访问令牌（用于私有仓库）
+        gitea_token: Gitea 访问令牌（用于私有仓库）
         event_emitter: 事件发送器（用于发送实时日志）
 
     Returns:
@@ -2476,6 +2480,16 @@ async def _get_project_root(
                     parsed.fragment
                 ))
                 await emit(f"🔐 使用 GitLab Token 认证")
+            elif repo_type == "gitea" and gitea_token:
+                auth_url = urlunparse((
+                    parsed.scheme,
+                    f"{gitea_token}@{parsed.netloc}",
+                    parsed.path,
+                    parsed.params,
+                    parsed.query,
+                    parsed.fragment
+                ))
+                await emit(f"🔐 使用 Gitea Token 认证")
 
             for branch in branches_to_try:
                 check_cancelled()
diff --git a/backend/app/services/rag/splitter.py b/backend/app/services/rag/splitter.py
index 184db35..65d4f16 100644
--- a/backend/app/services/rag/splitter.py
+++ b/backend/app/services/rag/splitter.py
@@ -154,7 +154,7 @@ class TreeSitterParser:
         ".c": "c",
         ".h": "c",
         ".hpp": "cpp",
-        ".cs": "c_sharp",
+        ".cs": "csharp",
         ".php": "php",
         ".rb": "ruby",
         ".kt": "kotlin",
@@ -197,7 +197,7 @@ class TreeSitterParser:
     # tree-sitter-languages 支持的语言列表
     SUPPORTED_LANGUAGES = {
         "python", "javascript", "typescript", "tsx", "java", "go", "rust",
-        "c", "cpp", "c_sharp", "php", "ruby", "kotlin", "swift", "bash",
+        "c", "cpp", "csharp", "php", "ruby", "kotlin", "swift", "bash",
         "json", "yaml", "html", "css", "sql", "markdown",
     }