Add DataFolders component to ServerSettings for managing system folder paths

- Introduced a new DataFolders component to display and manage paths for application data, models, and providers.
- Implemented a FolderRow component for individual folder display, including loading states and open folder functionality.
- Added API client methods and hooks to fetch system folder paths from the backend.
- Updated ServerTab to include the new DataFolders component, enhancing server settings management.

app/src/components/ServerSettings/DataFolders.tsx

@@ -0,0 +1,112 @@
+import { Folder01Icon, FolderOpenIcon } from '@hugeicons/core-free-icons';
+import { HugeiconsIcon } from '@hugeicons/react';
+import { Icon } from '@iconify/react';
+import { Button } from '@/components/ui/button';
+import { Card, CardContent, CardDescription, CardHeader, CardTitle } from '@/components/ui/card';
+import { Input } from '@/components/ui/input';
+import { useSystemFolders } from '@/lib/hooks/useSystemFolders';
+import { usePlatform } from '@/platform/PlatformContext';
+
+interface FolderRowProps {
+  label: string;
+  description: string;
+  path: string | undefined;
+  isLoading: boolean;
+  canOpen: boolean;
+  onOpen: () => void;
+}
+
+function FolderRow({ label, description, path, isLoading, canOpen, onOpen }: FolderRowProps) {
+  return (
+    <div className="space-y-1.5">
+      <div className="flex items-center justify-between">
+        <div>
+          <div className="text-sm font-medium">{label}</div>
+          <div className="text-xs text-muted-foreground">{description}</div>
+        </div>
+        {canOpen && path && (
+          <Button
+            variant="outline"
+            size="sm"
+            onClick={onOpen}
+            disabled={isLoading || !path}
+            className="shrink-0"
+          >
+            <HugeiconsIcon icon={FolderOpenIcon} size={16} className="h-4 w-4 mr-2" />
+            Open
+          </Button>
+        )}
+      </div>
+      <Input
+        value={isLoading ? 'Loading...' : path || 'Not available'}
+        readOnly
+        className="font-mono text-xs text-muted-foreground select-all cursor-text"
+      />
+    </div>
+  );
+}
+
+export function DataFolders() {
+  const { data: folders, isLoading, error } = useSystemFolders();
+  const platform = usePlatform();
+  const isTauri = platform.metadata.isTauri;
+
+  const handleOpenFolder = async (path: string | undefined) => {
+    if (!path) return;
+    const success = await platform.filesystem.openFolder(path);
+    if (!success && isTauri) {
+      console.error('Failed to open folder:', path);
+    }
+  };
+
+  return (
+    <Card>
+      <CardHeader>
+        <CardTitle className="flex items-center gap-2">
+          <HugeiconsIcon icon={Folder01Icon} size={20} className="h-5 w-5" />
+          Data Folders
+        </CardTitle>
+        <CardDescription>
+          {isTauri
+            ? 'Click "Open" to view folders in your file explorer, or copy the paths below.'
+            : 'These are the server-side folder paths where your data is stored.'}
+        </CardDescription>
+      </CardHeader>
+      <CardContent className="space-y-4">
+        {error ? (
+          <div className="flex items-center gap-2 text-sm text-destructive">
+            <Icon icon="lucide:alert-circle" className="h-4 w-4" />
+            <span>Failed to load folder paths: {error.message}</span>
+          </div>
+        ) : (
+          <>
+            <FolderRow
+              label="App Data"
+              description="Voices, generations, and app database"
+              path={folders?.data_dir}
+              isLoading={isLoading}
+              canOpen={isTauri}
+              onOpen={() => handleOpenFolder(folders?.data_dir)}
+            />
+            <FolderRow
+              label="Models"
+              description="Downloaded AI models from HuggingFace Hub"
+              path={folders?.models_dir}
+              isLoading={isLoading}
+              canOpen={isTauri}
+              onOpen={() => handleOpenFolder(folders?.models_dir)}
+            />
+            <FolderRow
+              label="Providers"
+              description="External TTS provider binaries (PyTorch CPU/CUDA)"
+              path={folders?.providers_dir}
+              isLoading={isLoading}
+              canOpen={isTauri}
+              onOpen={() => handleOpenFolder(folders?.providers_dir)}
+            />
+          </>
+        )}
+      </CardContent>
+    </Card>
+  );
+}

app/src/components/ServerTab/ServerTab.tsx

@@ -1,4 +1,5 @@
 import { ConnectionForm } from '@/components/ServerSettings/ConnectionForm';
+import { DataFolders } from '@/components/ServerSettings/DataFolders';
 import { ServerStatus } from '@/components/ServerSettings/ServerStatus';
 import { UpdateStatus } from '@/components/ServerSettings/UpdateStatus';
 import { ProviderSettings } from '@/components/ServerSettings/ProviderSettings';
@@ -13,6 +14,7 @@ export function ServerTab() {
         <ServerStatus />
       </div>
       <ProviderSettings />
+      <DataFolders />
       {platform.metadata.isTauri && <UpdateStatus />}
       <div className="py-8 text-center text-sm text-muted-foreground">
         Created by{' '}