feat(settings): add downloaded page and filter settings

backend/src/migrations/004_downloaded_settings.sql

@@ -0,0 +1,9 @@
+-- ===================================
+-- Migration 004: Downloaded games page and filter settings
+-- ===================================
+
+INSERT OR IGNORE INTO system_settings (key, value, data_type, category, description, is_public, default_value, validation_schema)
+VALUES
+  ('features.enable_downloaded_page', '1', 'boolean', 'features', 'Show the Downloaded games page', 1, '1', '{"type":"boolean"}'),
+  ('features.enable_downloaded_page_for_guests', '0', 'boolean', 'features', 'Allow guests to see the Downloaded games page', 1, '0', '{"type":"boolean"}'),
+  ('features.enable_downloaded_filter_default', '0', 'boolean', 'features', 'Turn the downloaded filter on by default when browsing', 1, '0', '{"type":"boolean"}');

frontend/src/components/settings/FeaturesSettingsTab.tsx

@@ -181,6 +181,77 @@ export function FeaturesSettingsTab({ tabContentVariants }: FeaturesSettingsTabP
                 disabled={updateSystemSettings.isPending}
               />
             </div>
+
+            {/* Downloaded page */}
+            <div className="flex items-center justify-between">
+              <div className="space-y-0.5">
+                <Label htmlFor="enable-downloaded-page" className="text-base">
+                  Enable Downloaded Page
+                </Label>
+                <p className="text-sm text-muted-foreground">
+                  Show a page listing only games whose files are downloaded.
+                </p>
+              </div>
+              <Switch
+                id="enable-downloaded-page"
+                checked={featureSettings.enableDownloadedPage !== false}
+                onCheckedChange={(checked: boolean) => {
+                  updateSystemSettings.mutate({
+                    category: 'features',
+                    settings: { enableDownloadedPage: checked },
+                  });
+                }}
+                disabled={updateSystemSettings.isPending}
+              />
+            </div>
+
+            {featureSettings.enableDownloadedPage !== false ? (
+              <div className="flex items-center justify-between pl-6 border-l-2 border-border">
+                <div className="space-y-0.5">
+                  <Label htmlFor="enable-downloaded-page-guests" className="text-base">
+                    Show Downloaded Page To Guests
+                  </Label>
+                  <p className="text-sm text-muted-foreground">
+                    Let signed-out guests open the Downloaded page.
+                  </p>
+                </div>
+                <Switch
+                  id="enable-downloaded-page-guests"
+                  checked={featureSettings.enableDownloadedPageForGuests === true}
+                  onCheckedChange={(checked: boolean) => {
+                    updateSystemSettings.mutate({
+                      category: 'features',
+                      settings: { enableDownloadedPageForGuests: checked },
+                    });
+                  }}
+                  disabled={updateSystemSettings.isPending}
+                />
+              </div>
+            ) : null}
+
+            {/* Downloaded filter default */}
+            <div className="flex items-center justify-between">
+              <div className="space-y-0.5">
+                <Label htmlFor="enable-downloaded-filter-default" className="text-base">
+                  Filter To Downloaded By Default
+                </Label>
+                <p className="text-sm text-muted-foreground">
+                  Browse pages start with the downloaded filter on. This one also applies to admins;
+                  anyone can still switch it off per page.
+                </p>
+              </div>
+              <Switch
+                id="enable-downloaded-filter-default"
+                checked={featureSettings.enableDownloadedFilterDefault === true}
+                onCheckedChange={(checked: boolean) => {
+                  updateSystemSettings.mutate({
+                    category: 'features',
+                    settings: { enableDownloadedFilterDefault: checked },
+                  });
+                }}
+                disabled={updateSystemSettings.isPending}
+              />
+            </div>
           </div>
         </div>
       ) : null}

frontend/src/hooks/useFeatureFlags.ts

@@ -21,6 +21,11 @@ export function useFeatureFlags() {
     // Cosmetic chrome rather than a capability: no admin bypass, otherwise an
     // admin could never hide the button in their own session.
     enableLuckyButton: (features.enableLuckyButton ?? true) !== false,
+    enableDownloadedPage: isAdmin || (features.enableDownloadedPage ?? true),
+    // Default-off flags are read strictly: the `?? true` fallback used above would
+    // invert them while public settings are still loading or if the key is missing.
+    enableDownloadedPageForGuests: features.enableDownloadedPageForGuests === true,
+    enableDownloadedFilterDefault: features.enableDownloadedFilterDefault === true,
     isFeatureEnabled: (featureName: string) => {
       return isAdmin || ((features as Record<string, unknown>)[featureName] ?? true) !== false;
     },

frontend/src/types/settings.ts

@@ -18,6 +18,9 @@ export interface FeatureSettings {
   enableStatistics: boolean;
   enableRatings: boolean;
   enableLuckyButton: boolean;
+  enableDownloadedPage: boolean;
+  enableDownloadedPageForGuests: boolean;
+  enableDownloadedFilterDefault: boolean;
 }
 
 export interface GameSettings {