v0.12.9: Tier 2 for all apps + status dot update

- Tier 2 cross-drive backup now configurable for all apps (not just HDD apps)
- Non-HDD apps (Mealie, Gokapi) can back up config + DB to secondary drive
- Status dot: removed "auto" gray — all apps start yellow, green = 2+ tiers OK
- Backup page: Tier 2 row always shown, Tier 3 placeholder added
- Deploy page: cross-drive config visible for all deployed apps
- Meta badges: non-HDD apps show "Konfig" or "Konfig + DB" instead of "Auto"

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

controller/internal/backup/crossdrive.go

@@ -95,12 +95,8 @@ func (r *CrossDriveRunner) RunAppBackup(ctx context.Context, stackName string) e
 		return fmt.Errorf("destination validation failed: %w", err)
 	}
 
-	// Resolve HDD mounts for this app
+	// Resolve HDD mounts for this app (may be empty for config-only apps)
 	mounts := r.stackProvider.GetStackHDDMounts(stackName)
-	if len(mounts) == 0 {
-		r.updateStatus(stackName, "error", "no HDD data paths found for this app", time.Since(start), "")
-		return fmt.Errorf("no HDD data paths found for %s", stackName)
-	}
 
 	// Safety: destination must not overlap with any source
 	for _, m := range mounts {