Align MCP/CLI naming and resolve default model/mode server-side (#291)

* Align create_agent naming and resolve defaults server-side

* Fix test assertions for default model/mode resolution

- Use config.model and config.modeId instead of non-existent snapshot.model
- Strip legacy "default" model ID in normalizeConfig
- Update runtimeInfo assertion to expect resolved default model

* Fix CI: update CLI test for --title, fix formatting in checkout-git

packages/server/src/utils/checkout-git.ts

@@ -1006,10 +1006,10 @@ async function getAheadOfOrigin(cwd: string, currentBranch: string): Promise<num
     return Number.isNaN(count) ? null : count;
   } catch {
     try {
-      const { stdout } = await execAsync(
-        `git rev-list --count ${currentBranch}`,
-        { cwd, env: READ_ONLY_GIT_ENV },
-      );
+      const { stdout } = await execAsync(`git rev-list --count ${currentBranch}`, {
+        cwd,
+        env: READ_ONLY_GIT_ENV,
+      });
       const count = Number.parseInt(stdout.trim(), 10);
       return Number.isNaN(count) ? null : count;
     } catch {