fix: use working clones for git repos

- Create normal working clones for remote repositories
- Initialize blank repositories with a main branch
- Align pull and branch helpers with unborn HEAD handling
- Gate fetch/pull on repositories with a remote

Quality gates: vitest repositories-settings-tab (passed); api pytest blocked by missing fastapi in environment

apps/web/src/components/git-toolbar.tsx

@@ -17,6 +17,7 @@ interface GitToolbarProps {
   repoId: string;
   currentBranch: string;
   branches: string[];
+  hasRemote: boolean;
   onBranchChange: (branch: string) => void;
   onRefresh: () => void;
 }
@@ -26,6 +27,7 @@ export const GitToolbar = ({
   repoId,
   currentBranch,
   branches,
+  hasRemote,
   onBranchChange,
   onRefresh,
 }: GitToolbarProps) => {
@@ -55,6 +57,7 @@ export const GitToolbar = ({
   }, [loadStatus]);
 
   const handleFetch = async () => {
+    if (!hasRemote) return;
     setLoading(true);
     try {
       await fetchRepository(projectId, repoId);
@@ -67,9 +70,10 @@ export const GitToolbar = ({
   };
 
   const handlePull = async () => {
+    if (!hasRemote) return;
     setLoading(true);
     try {
-      await pullRepository(projectId, repoId, currentBranch);
+      await pullRepository(projectId, repoId, currentBranch || undefined);
       await loadStatus();
       onRefresh();
     } catch {
@@ -162,10 +166,10 @@ export const GitToolbar = ({
         </div>
 
         <div className="toolbar-group">
-            <button
+          <button
             className="toolbar-button"
             onClick={handleFetch}
-            disabled={loading}
+            disabled={loading || !hasRemote}
             type="button"
           >
             <Icon name="fetch" size="sm" /> Fetch
@@ -173,7 +177,7 @@ export const GitToolbar = ({
           <button
             className="toolbar-button"
             onClick={handlePull}
-            disabled={loading}
+            disabled={loading || !hasRemote}
             type="button"
           >
             <Icon name="pull" size="sm" /> Pull