feat(sproutclaw): modularize webui, extensions, and agent config layout

Restructure local extensions into per-feature directories, split WebUI
into backend modules with slash commands and systemd support, and track
prompts/skills under .pi/agent for portable Gitea deployment.

Co-authored-by: Cursor <cursoragent@cursor.com>

.pi/agent/extensions/webui/frontend/src/App.tsx

@@ -12,20 +12,15 @@ export function App() {
 		<BrowserRouter>
 			<BootstrapProvider>
 				<AvatarProvider>
-					<Routes>
-						<Route
-							path="/"
-							element={
-								<ChatProvider>
-									<ChatLayout />
-								</ChatProvider>
-							}
-						>
-							<Route index element={<ChatPage />} />
-						</Route>
-						<Route path="/settings" element={<SettingsPage />} />
-					</Routes>
-					<PwaUpdatePrompt />
+					<ChatProvider>
+						<Routes>
+							<Route path="/" element={<ChatLayout />}>
+								<Route index element={<ChatPage />} />
+							</Route>
+							<Route path="/settings" element={<SettingsPage />} />
+						</Routes>
+						<PwaUpdatePrompt />
+					</ChatProvider>
 				</AvatarProvider>
 			</BootstrapProvider>
 		</BrowserRouter>