fix: register missing /api/config/reset and /api/starship/apply-theme routes

- Add resetConfig and applyStarshipTheme to frontend api client
- Register handleResetConfig and handleApplyStarshipTheme in server mux

💘 Generated with Crush

Assisted-by: MiniMax-M2.7 via Crush <crush@charm.land>

web/src/api/client.js

@@ -28,6 +28,8 @@ const api = {
   savePreferences: (prefs) => request('/preferences', { method: 'PUT', body: JSON.stringify(prefs) }),
   saveProfile: (profile) => request('/config/profile', { method: 'PUT', body: JSON.stringify(profile) }),
   saveProvider: (provider) => request('/config/provider', { method: 'PUT', body: JSON.stringify(provider) }),
+  resetConfig: () => request('/config/reset', { method: 'POST' }),
+  applyStarshipTheme: (theme) => request('/starship/apply-theme', { method: 'POST', body: JSON.stringify({ theme }) }),
   validateProvider: (provider) => request('/providers/validate', { method: 'POST', body: JSON.stringify(provider) }),
   runUpdate: (tool) => request('/update/run', { method: 'POST', body: JSON.stringify({ tool: tool || '' }) }),
   runCommand: (command, cwd) => request('/terminal', { method: 'POST', body: JSON.stringify({ command, cwd }) }),