Git-Status Endpoint mit Outgoing-Commits und Dashboard-Badges

- GET /api/sessions/{id}/git-status: Parsed git status --porcelain in add/edit/delete Listen
- Outgoing-Commits: Zählt unpushed Commits via git rev-list --count @{u}..HEAD
- Dashboard: Zeigt Git-Badges asynchron pro Session (+N, ~N, -N, ↑N)
- CSS: Farbige Badges (grün=add, orange=edit, rot=delete, blau=outgoing)

wwwroot/js/api.js

@@ -131,6 +131,12 @@ async function apiGetChain(chainId) {
   return resp.json();
 }
 
+async function apiGitStatus(sessionId) {
+  const resp = await fetch(`/api/sessions/${sessionId}/git-status`);
+  if (!resp.ok) return null;
+  return resp.json();
+}
+
 async function apiBackupDb() {
   const resp = await fetch('/api/backup', { method: 'POST' });
   if (!resp.ok) throw new Error('Backup fehlgeschlagen');