docs: point markdown backlogs at Gitea issues (status lives in Gitea)

Adds the family backlog standard to the root index (open work = Gitea issues,
shared label set, BTDB excluded) and converts components/*/GAPS, hosted-lib
CLAUDE.md notes, code-reviews, infra/glauth and plan docs to banner + issue
pointers (scadaproj #5-#19, ScadaBridge#79).

components/ui-theme/GAPS.md

@@ -1,5 +1,10 @@
 # UI Theme — gaps & adoption backlog
 
+> **Status lives in Gitea.** Open items from this file are tracked as issues on
+> [gitea.dohertylan.com/dohertj2/scadaproj](https://gitea.dohertylan.com/dohertj2/scadaproj/issues)
+> (label `migrated`, 2026-11-06). This file is a historical/design record — do not track status
+> here; file new work as an issue.
+
 Divergence of each project from [`spec/SPEC.md`](spec/SPEC.md), and the ordered backlog to
 reach adoption of the `ZB.MOM.WW.Theme` shared RCL. Status legend: ⛔ gap · 🟡 partial · ✅ matches.
 
@@ -35,7 +40,7 @@ reach adoption of the `ZB.MOM.WW.Theme` shared RCL. Status legend: ⛔ gap ·
 > **MxGateway** shed the dead `.sidebar` block + orphaned `.dashboard-login`/`.login-card` (−106), keeping
 > `.app-bar` (still used by `/denied`) + the `.chip` override. Each verified unreferenced before removal; all
 > three build clean (0 warn/0 err). OtOpcUa's copy was the notable one — it *overrode* the kit, not just dead code.
-> **Still deferred:** a kit-side `layout.css` `calc(100vh - 3.3rem)` review; and ScadaBridge's `Host` consumes the
+> **Still deferred:** a kit-side `layout.css` `calc(100vh - 3.3rem)` review (→ #10); and ScadaBridge's `Host` consumes the
 > kit only **transitively via `CentralUI`** (no direct `PackageReference`) — builds green, but an implicit dependency.
 >
 > _Feed note: the same audit re-confirmed `ZB.MOM.WW.Theme 0.2.0` **is** genuinely on the Gitea feed (registration