feat(git): додано підтримку diff для репозиторіїв без комітів

Author: uaoa

src/utils/git.ts

@@ -17,17 +17,55 @@ async function getStagedDiff(repoPath: string): Promise<DiffResult> {
   return { diff: diffResult.stdout || "", stats: statsResult.stdout || "" };
 }
 
+async function hasCommits(repoPath: string): Promise<boolean> {
+  try {
+    await execAsync("git rev-parse HEAD", { cwd: repoPath });
+    return true;
+  } catch {
+    return false;
+  }
+}
+
 async function getAllDiff(repoPath: string): Promise<DiffResult> {
-  const [diffResult, statsResult] = await Promise.all([
-    execAsync("git diff HEAD --unified=1", {
-      cwd: repoPath,
-      maxBuffer: 10 * 1024 * 1024,
-    }),
-    execAsync("git diff HEAD --stat", {
-      cwd: repoPath,
-    }),
-  ]);
-  return { diff: diffResult.stdout || "", stats: statsResult.stdout || "" };
+  const repoHasCommits = await hasCommits(repoPath);
+
+  if (repoHasCommits) {
+    // Repository has commits - use HEAD to get all changes
+    const [diffResult, statsResult] = await Promise.all([
+      execAsync("git diff HEAD --unified=1", {
+        cwd: repoPath,
+        maxBuffer: 10 * 1024 * 1024,
+      }),
+      execAsync("git diff HEAD --stat", {
+        cwd: repoPath,
+      }),
+    ]);
+    return { diff: diffResult.stdout || "", stats: statsResult.stdout || "" };
+  }
+
+  // New repository without commits - combine staged and unstaged diffs
+  const [stagedDiff, stagedStats, unstagedDiff, unstagedStats] =
+    await Promise.all([
+      execAsync("git diff --cached --unified=1", {
+        cwd: repoPath,
+        maxBuffer: 10 * 1024 * 1024,
+      }),
+      execAsync("git diff --cached --stat", { cwd: repoPath }),
+      execAsync("git diff --unified=1", {
+        cwd: repoPath,
+        maxBuffer: 10 * 1024 * 1024,
+      }),
+      execAsync("git diff --stat", { cwd: repoPath }),
+    ]);
+
+  const diff = [stagedDiff.stdout, unstagedDiff.stdout]
+    .filter(Boolean)
+    .join("\n");
+  const stats = [stagedStats.stdout, unstagedStats.stdout]
+    .filter(Boolean)
+    .join("\n");
+
+  return { diff, stats };
 }
 
 export async function getDiff(