FN-6822: add dashboard i18n accessible-name fallbacks

Ensure dashboard accessibility labels render English defaults when i18n catalogs are unavailable.

- Add inline default text for the dashboard loader status label.
- Reuse the stash copy-reference fallback label for button accessibility and initial focus targeting.

Files changed:
 packages/dashboard/app/components/DashboardLoader.tsx    | 10 +++++++++-
 packages/dashboard/app/components/StashConflictModal.tsx | 12 +++++++++---
 2 files changed, 18 insertions(+), 4 deletions(-)

Fusion-Task-Id: FN-6822

Fusion-Task-Lineage: 5057b051-43bd-467c-87b7-9ce86522c0c3

packages/dashboard/app/components/DashboardLoader.tsx

@@ -75,12 +75,20 @@ export function DashboardLoader({ stage }: DashboardLoaderProps) {
     return versionUpdated;
   });
 
+  /**
+   * FNXC:DashboardI18n 2026-06-20-23:20:
+   * FN-6822 requires the loader status region accessible name to carry inline English defaults so backend-less test i18next and pre-catalog first paint render the localized label instead of the raw key.
+   */
+  const statusLabel = isVersionUpdate
+    ? t("dashboard.updatingMessage", "Updating Fusion dashboard")
+    : t("dashboard.loadingMessage", "Loading Fusion dashboard");
+
   return (
     <div
       className="dashboard-loader"
       role="status"
       aria-live="polite"
-      aria-label={isVersionUpdate ? t("dashboard.updatingMessage") : t("dashboard.loadingMessage")}
+      aria-label={statusLabel}
       data-stage={stage}
       data-version-update={isVersionUpdate ? "true" : undefined}
     >

packages/dashboard/app/components/StashConflictModal.tsx

@@ -85,6 +85,12 @@ export default function StashConflictModal({
   const [error, setError] = useState<string | null>(null);
   const [copyState, setCopyState] = useState<"idle" | "copied" | "failed">("idle");
 
+  /**
+   * FNXC:StashConflictModalI18n 2026-06-20-23:22:
+   * FN-6822 requires the copy-reference accessible name to use the same inline English default for both the rendered button and the initial-focus selector so backend-less i18next does not expose raw keys or break focus targeting.
+   */
+  const copyReferenceLabel = t("stash.copyReference", "Copy stash reference");
+
   useEffect(() => {
     if (open) {
       setRemainingConflicts(autostashOutcome === "failed" ? [] : conflictedFiles);
@@ -103,7 +109,7 @@ export default function StashConflictModal({
     const modalElement = modalRef.current;
     if (modalElement) {
       const focusable = getFocusableElements(modalElement);
-      const preferred = focusable.find((element) => element.getAttribute("aria-label") === t("stash.copyReference")) ?? focusable[0];
+      const preferred = focusable.find((element) => element.getAttribute("aria-label") === copyReferenceLabel) ?? focusable[0];
       if (preferred) {
         preferred.focus();
       } else {
@@ -156,7 +162,7 @@ export default function StashConflictModal({
       }
       previousFocusRef.current = null;
     };
-  }, [open, onClose]);
+  }, [copyReferenceLabel, open, onClose]);
 
   const stashDescriptor = useMemo(() => `Stash ref: ${shortSha(stashSha)} (${stashLabel})`, [stashLabel, stashSha]);
 
@@ -241,7 +247,7 @@ export default function StashConflictModal({
         ) : null}
         <div className="stash-conflict-modal__stash-row">
           <span>{stashDescriptor}</span>
-          <button type="button" className="btn btn-sm btn-icon" onClick={copyRef} aria-label={t("stash.copyReference")}>
+          <button type="button" className="btn btn-sm btn-icon" onClick={copyRef} aria-label={copyReferenceLabel}>
             <Copy aria-hidden="true" />
           </button>
         </div>