feat: add session auto-cleanup settings and functionality

packages/ui/src/lib/api/types.ts

@@ -330,6 +330,8 @@ export interface SettingsPayload {
   securityScopedBookmarks?: string[];
   pinnedDirectories?: string[];
   showReasoningTraces?: boolean;
+  autoDeleteEnabled?: boolean;
+  autoDeleteAfterDays?: number;
 
   [key: string]: unknown;
 }

packages/ui/src/lib/appearanceAutoSave.ts

@@ -4,6 +4,8 @@ import type { DesktopSettings } from '@/lib/desktop';
 
 type AppearanceSlice = {
   showReasoningTraces: boolean;
+  autoDeleteEnabled: boolean;
+  autoDeleteAfterDays: number;
 };
 
 let initialized = false;
@@ -17,6 +19,8 @@ export const startAppearanceAutoSave = (): void => {
 
   let previous: AppearanceSlice = {
     showReasoningTraces: useUIStore.getState().showReasoningTraces,
+    autoDeleteEnabled: useUIStore.getState().autoDeleteEnabled,
+    autoDeleteAfterDays: useUIStore.getState().autoDeleteAfterDays,
   };
 
   let pending: Partial<DesktopSettings> | null = null;
@@ -42,6 +46,8 @@ export const startAppearanceAutoSave = (): void => {
   useUIStore.subscribe((state) => {
     const current: AppearanceSlice = {
       showReasoningTraces: state.showReasoningTraces,
+      autoDeleteEnabled: state.autoDeleteEnabled,
+      autoDeleteAfterDays: state.autoDeleteAfterDays,
     };
 
     const diff: Partial<DesktopSettings> = {};
@@ -49,6 +55,12 @@ export const startAppearanceAutoSave = (): void => {
     if (current.showReasoningTraces !== previous.showReasoningTraces) {
       diff.showReasoningTraces = current.showReasoningTraces;
     }
+    if (current.autoDeleteEnabled !== previous.autoDeleteEnabled) {
+      diff.autoDeleteEnabled = current.autoDeleteEnabled;
+    }
+    if (current.autoDeleteAfterDays !== previous.autoDeleteAfterDays) {
+      diff.autoDeleteAfterDays = current.autoDeleteAfterDays;
+    }
 
     previous = current;
 

packages/ui/src/lib/desktop.ts

@@ -39,6 +39,8 @@ export type DesktopSettings = {
   securityScopedBookmarks?: string[];
   pinnedDirectories?: string[];
   showReasoningTraces?: boolean;
+  autoDeleteEnabled?: boolean;
+  autoDeleteAfterDays?: number;
 };
 
 export type DesktopSettingsApi = {

packages/ui/src/lib/persistence.ts

@@ -59,6 +59,15 @@ const applyDesktopUiPreferences = (settings: DesktopSettings) => {
   if (typeof settings.showReasoningTraces === 'boolean' && settings.showReasoningTraces !== store.showReasoningTraces) {
     store.setShowReasoningTraces(settings.showReasoningTraces);
   }
+  if (typeof settings.autoDeleteEnabled === 'boolean' && settings.autoDeleteEnabled !== store.autoDeleteEnabled) {
+    store.setAutoDeleteEnabled(settings.autoDeleteEnabled);
+  }
+  if (typeof settings.autoDeleteAfterDays === 'number' && Number.isFinite(settings.autoDeleteAfterDays)) {
+    const normalized = Math.max(1, Math.min(365, settings.autoDeleteAfterDays));
+    if (normalized !== store.autoDeleteAfterDays) {
+      store.setAutoDeleteAfterDays(normalized);
+    }
+  }
 };
 
 const sanitizeWebSettings = (payload: unknown): DesktopSettings | null => {
@@ -110,6 +119,12 @@ const sanitizeWebSettings = (payload: unknown): DesktopSettings | null => {
   if (typeof candidate.showReasoningTraces === 'boolean') {
     result.showReasoningTraces = candidate.showReasoningTraces;
   }
+  if (typeof candidate.autoDeleteEnabled === 'boolean') {
+    result.autoDeleteEnabled = candidate.autoDeleteEnabled;
+  }
+  if (typeof candidate.autoDeleteAfterDays === 'number' && Number.isFinite(candidate.autoDeleteAfterDays)) {
+    result.autoDeleteAfterDays = candidate.autoDeleteAfterDays;
+  }
 
   return result;
 };