fix(dashboard): align droid config diagnostics with factory paths

- replace ~/.config/factory/config.json diagnostics with legacy ~/.factory/config.json

- keep ~/.factory/settings.json as the primary BYOK source in UI + API payload

- update droid dashboard tests and frontend typings for legacyConfig

ui/src/hooks/use-droid.ts

@@ -40,7 +40,7 @@ export interface DroidDashboardDiagnostics {
   binary: DroidBinaryDiagnostics;
   files: {
     settings: DroidConfigFileDiagnostics;
-    globalConfig: DroidConfigFileDiagnostics;
+    legacyConfig: DroidConfigFileDiagnostics;
   };
   byok: {
     activeModelSelector: string | null;

ui/src/pages/droid.tsx

@@ -147,7 +147,7 @@ export function DroidPage() {
               </CardTitle>
             </CardHeader>
             <CardContent className="space-y-3">
-              {[diagnostics.files.settings, diagnostics.files.globalConfig].map((file) => (
+              {[diagnostics.files.settings, diagnostics.files.legacyConfig].map((file) => (
                 <div key={file.label} className="rounded-md border p-3 space-y-1.5">
                   <div className="flex items-center justify-between gap-2">
                     <span className="font-medium text-sm">{file.label}</span>