fix: correct MCP tool names, timeout kwarg, and make mcp a core dep

- Fix tool names to match gitea-mcp server: issue_write, issue_read,
  list_issues, pull_request_write, etc. (old names didn't exist)
- Fix timeout → timeout_seconds (MCPTools API)
- Move mcp from optional to core dependency (required for agent)
- Add PR tools (pull_request_write/read, list_pull_requests)
- Fix create_gitea_issue_via_mcp to use issue_write with method="create"
- Update tool_safety.py and tests for corrected names
- Regenerate poetry.lock

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

src/timmy/mcp_tools.py

@@ -57,12 +57,16 @@ def create_gitea_mcp_tools():
                 "GITEA_HOST": settings.gitea_url,
             },
             include_tools=[
-                "create_issue",
-                "list_repo_issues",
-                "create_issue_comment",
-                "edit_issue",
+                "issue_write",
+                "issue_read",
+                "list_issues",
+                "pull_request_write",
+                "pull_request_read",
+                "list_pull_requests",
+                "list_branches",
+                "list_commits",
             ],
-            timeout=settings.mcp_timeout,
+            timeout_seconds=settings.mcp_timeout,
         )
         logger.info("Gitea MCP tools created (lazy connect)")
         return tools
@@ -92,7 +96,7 @@ def create_filesystem_mcp_tools():
                 "get_file_info",
                 "directory_tree",
             ],
-            timeout=settings.mcp_timeout,
+            timeout_seconds=settings.mcp_timeout,
         )
         logger.info("Filesystem MCP tools created (lazy connect)")
         return tools
@@ -170,7 +174,7 @@ async def create_gitea_issue_via_mcp(title: str, body: str = "", labels: str = "
                     "GITEA_ACCESS_TOKEN": settings.gitea_token,
                     "GITEA_HOST": settings.gitea_url,
                 },
-                timeout=settings.mcp_timeout,
+                timeout_seconds=settings.mcp_timeout,
             )
 
         # Ensure connected
@@ -187,8 +191,9 @@ async def create_gitea_issue_via_mcp(title: str, body: str = "", labels: str = "
         # Parse owner/repo from settings
         owner, repo = settings.gitea_repo.split("/", 1)
 
-        # Build tool arguments
+        # Build tool arguments — gitea-mcp uses issue_write with method="create"
         args = {
+            "method": "create",
             "owner": owner,
             "repo": repo,
             "title": title,
@@ -196,7 +201,7 @@ async def create_gitea_issue_via_mcp(title: str, body: str = "", labels: str = "
         }
 
         # Call the MCP tool directly via the session
-        result = await _issue_session.call_tool("create_issue", arguments=args)
+        result = await _issue_session.call_tool("issue_write", arguments=args)
 
         # Bridge to local work order
         label_list = [tag.strip() for tag in labels.split(",") if tag.strip()] if labels else []