Fix case repo sync + auto-create Gitea repos + add sync indicator

- auto-sync-cases.sh: fix broken directory scan (was looking for
  status subdirs that don't exist), fix env var word-splitting bug,
  add safe.directory handling and error logging
- cases.py: auto-create Gitea repo on case_create, fix
  documents/original → documents/originals naming mismatch
- app.py: add GET /api/cases/{case_number}/git-status endpoint
- web-ui: add SyncIndicator component in case header showing
  sync status (synced/pending/no remote) with last commit time
- pyproject.toml: add httpx dependency
- CLAUDE.md: update Paperclip wakeup API docs
- settings page: switch tag input from Select to free-text with datalist

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

web-ui/src/lib/api/cases.ts

@@ -145,6 +145,28 @@ export function useUpdateCase(caseNumber: string | undefined) {
   });
 }
 
+export type GitSyncStatus = {
+  synced: boolean;
+  has_remote: boolean;
+  remote_url?: string | null;
+  dirty_files: number;
+  commits_ahead: number;
+  last_commit_time?: string | null;
+  last_commit_msg?: string | null;
+  error?: string;
+};
+
+export function useGitStatus(caseNumber: string | undefined) {
+  return useQuery({
+    queryKey: [...casesKeys.all, "git-status", caseNumber ?? ""] as const,
+    queryFn: ({ signal }) =>
+      apiRequest<GitSyncStatus>(`/api/cases/${caseNumber}/git-status`, { signal }),
+    enabled: Boolean(caseNumber),
+    staleTime: 30_000,
+    refetchInterval: 60_000,
+  });
+}
+
 export function useWorkflowStatus(caseNumber: string | undefined) {
   return useQuery({
     queryKey: [...casesKeys.all, "workflow", caseNumber ?? ""] as const,