fix(FN-011): catch CalledProcessError in get_status, fix deletion logic, add explicit encoding

Fusion-Task-Id: FN-011
Fusion-Task-Lineage: 4a9aca6f-9d91-43aa-8d2a-d59657c1541a

apps/api/app/git/operations.py

@@ -52,10 +52,12 @@ class LocalGitOperations(GitOperations):
         if not repo_path.exists() or not (repo_path / ".git").is_dir():
             raise RuntimeError("Not a git repository")
 
+        try:
             branch_result = subprocess.run(
                 ["git", "-C", str(repo_path), "branch", "--show-current"],
                 capture_output=True,
                 text=True,
+                encoding="utf-8",
                 check=True,
             )
             branch = branch_result.stdout.strip()
@@ -64,8 +66,11 @@ class LocalGitOperations(GitOperations):
                 ["git", "-C", str(repo_path), "status", "--porcelain"],
                 capture_output=True,
                 text=True,
+                encoding="utf-8",
                 check=True,
             )
+        except subprocess.CalledProcessError as exc:
+            raise RuntimeError("Git command failed") from exc
 
         untracked: list[str] = []
         modified: list[str] = []
@@ -83,7 +88,8 @@ class LocalGitOperations(GitOperations):
                 untracked.append(filename)
             elif index_status in ("M", "A"):
                 staged.append(filename)
-            elif index_status == "D" or worktree_status == "D":
+
+            if index_status == "D" or worktree_status == "D":
                 deleted.append(filename)
 
             if worktree_status == "M":