case-create: surface Gitea repo result + UI retry button

The auto-creation in case_create had two failure modes that combined to
make repos silently missing: a stale GITEA_TOKEN returning 401, and the
outer try/except in case_create that swallowed every exception with a
bare pass. Result: cases like 8174-24 ended up with a local git repo and
Paperclip project but no Gitea repo, with no signal anywhere.

_setup_gitea_remote now returns {ok, url, error} and never raises; the
result is attached to the case JSON and the FastAPI endpoint logs a
warning when ok=false. The UI gets a "צור ריפו ב-Gitea" button on the
case header that appears only when the repo or remote is missing.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

web-ui/src/components/cases/case-header.tsx

@@ -4,6 +4,7 @@ import { Badge } from "@/components/ui/badge";
 import { StatusBadge } from "@/components/cases/status-badge";
 import { SyncIndicator } from "@/components/cases/sync-indicator";
 import { CaseArchiveAction } from "@/components/cases/case-archive-action";
+import { CreateRepoButton } from "@/components/cases/create-repo-button";
 import {
   PRACTICE_AREA_LABELS,
   APPEAL_SUBTYPE_LABELS,
@@ -67,6 +68,7 @@ export function CaseHeader({ data }: { data?: CaseDetail }) {
                   archivedAt={data.archived_at}
                 />
               )}
+              <CreateRepoButton data={data} />
             </div>
             <h1 className="text-navy text-xl font-bold leading-snug max-w-2xl mb-0">
               {data?.title ?? "טוען…"}