Remove completed TASK-012 from task list

TASK-012 (SetupGuard duplicate API calls) has been resolved and is no longer
relevant to track in the tasks document.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Docs/Tasks.md

@@ -1,33 +1,3 @@
-## TASK-012 — `SetupGuard` fires duplicate API calls on mount
-
-**Severity:** Low
-
-### Where found
-Frontend setup guard component — the setup status check is performed by multiple consumers independently on mount, resulting in duplicate `GET /api/setup` requests.
-
-### Why this is needed
-Duplicate API calls on mount create unnecessary backend load and introduce potential race conditions where both calls return slightly different states. It also increases perceived load time.
-
-### Goal
-Deduplicate the setup status check so all consumers share a single in-flight request.
-
-### What to do
-1. Move the setup status fetch into a shared React Query (`useQuery`) call keyed by `"setupStatus"`.
-2. Any component that needs the setup status reads from the same query cache — React Query deduplicates concurrent requests automatically.
-3. Remove any direct `fetch` calls for setup status that bypass the shared query.
-
-### Possible traps and issues
-- React Query must be installed and configured at the app root.
-- The cache TTL for setup status should be relatively short (e.g., 30 seconds) or invalidated after a successful setup completion.
-
-### Docs changes needed
-- `Web-Development.md` — data-fetching conventions (use React Query, not raw `fetch`).
-
-### Doc references
-- [Web-Development.md](Web-Development.md) — data fetching patterns
-
----
-
 ## TASK-013 — nginx missing security response headers
 
 **Severity:** High