diff --git a/AGENTS.md b/AGENTS.md
index b8660c1..a2e15ce 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -26,6 +26,11 @@ The product is a private-deployment, project-centered workbench for individual k
 - Keep task sharing conservative: assignees see the task and only explicitly shared linked objects.
 - AI must not create official objects without user confirmation.
 - AI calls must record provider, key type, action, status, and errors.
+- Auth session tokens must be signed, expiring bearer tokens; do not accept forgeable `user:<id>` strings.
+- HTTP handlers must read the current user from auth middleware and must not hard-code user IDs.
+- Generated tasks, notes, and sources from inbox confirmation should retain their source inbox item ID.
+- Task sharing must verify that the shared note/source belongs to the same project as the task.
+- User AI keys must be encrypted at rest and AI calls should pass through rate-limit checks before provider execution.
 
 ## Frontend Rules
 
diff --git a/README.md b/README.md
index 36090a1..1ce903c 100644
--- a/README.md
+++ b/README.md
@@ -14,6 +14,14 @@ go run ./cmd/api
 
 The web client uses Svelte and TypeScript only. The login shell lets users enter a server IP address or domain name, which is saved as the API base URL.
 
+## Backend Configuration
+
+- `PORT`: API listen port, default `8080`.
+- `DATABASE_URL`: PostgreSQL connection string. Do not commit real credentials.
+- `AUTH_SECRET`: HMAC secret for invite and session tokens.
+- `SYSTEM_AI_KEY`: optional fallback AI provider key.
+- `AI_KEY_ENCRYPTION_SECRET`: secret used to encrypt user AI keys at rest.
+
 ## Verification
 
 See `docs/mvp-verification.md` for backend, web, desktop, PostgreSQL, and manual MVP verification steps.
diff --git a/apps/web/e2e/project-workbench.spec.ts b/apps/web/e2e/project-workbench.spec.ts
index a1f847f..8a2358a 100644
--- a/apps/web/e2e/project-workbench.spec.ts
+++ b/apps/web/e2e/project-workbench.spec.ts
@@ -7,3 +7,11 @@ test('project workbench shell renders', async ({ page }) => {
   await expect(page.getByLabel('服务器 IP 或域名')).toBeVisible();
   await expect(page.getByLabel('项目总览')).toBeVisible();
 });
+
+test('inbox suggestions require explicit confirmation', async ({ page }) => {
+  await page.goto('/');
+  await page.getByLabel('选择 跟进报价').check();
+  await page.getByRole('button', { name: '创建选中项' }).click();
+
+  await expect(page.getByText('已选择 1 项')).toBeVisible();
+});
diff --git a/apps/web/src/app/App.svelte b/apps/web/src/app/App.svelte
index ffeeb8d..a4c6389 100644
--- a/apps/web/src/app/App.svelte
+++ b/apps/web/src/app/App.svelte
@@ -1,12 +1,60 @@
 <script lang="ts">
+  import { onMount } from 'svelte';
   import ProjectDashboard from '../features/projects/ProjectDashboard.svelte';
   import ServerLogin from '../features/auth/ServerLogin.svelte';
+  import SuggestionList from '../features/inbox/SuggestionList.svelte';
+  import type { Suggestion } from '../features/inbox/types';
+  import { createApi, type ProjectDashboardSummary } from '../lib/api';
+
+  const emptyDashboard: ProjectDashboardSummary = {
+    project_id: 1,
+    pending_inbox_count: 0,
+    open_task_count: 0,
+    recent_note_count: 0,
+    recent_session_count: 0,
+  };
 
   let apiBase = localStorage.getItem('apiBase') ?? 'http://localhost:8080';
+  let dashboard = emptyDashboard;
+  let connectionStatus = '未连接';
+  let selectedSuggestionCount = 0;
+
+  const sampleSuggestions: Suggestion[] = [
+    {
+      kind: 'task',
+      title: '跟进报价',
+      body: '从项目 inbox 确认后创建任务，并保留来源记录。',
+    },
+    {
+      kind: 'note',
+      title: '客户背景',
+      body: '把对话中的背景信息沉淀成项目笔记。',
+    },
+  ];
+
+  onMount(() => {
+    void loadDashboard();
+  });
 
   function handleServerChange(event: CustomEvent<{ apiBase: string }>) {
     apiBase = event.detail.apiBase;
     localStorage.setItem('apiBase', apiBase);
+    void loadDashboard();
+  }
+
+  async function loadDashboard() {
+    connectionStatus = '连接中';
+    try {
+      dashboard = await createApi(apiBase).getProjectDashboard(1);
+      connectionStatus = '已连接';
+    } catch {
+      dashboard = emptyDashboard;
+      connectionStatus = '无法连接服务器';
+    }
+  }
+
+  function handleConfirm(selected: Suggestion[]) {
+    selectedSuggestionCount = selected.length;
   }
 </script>
 
@@ -14,17 +62,15 @@
   <aside class="sidebar">
     <h1>项目工作台</h1>
     <ServerLogin {apiBase} on:serverChange={handleServerChange} />
+    <p class="connection-status" aria-live="polite">{connectionStatus}</p>
   </aside>
 
   <section class="workspace">
-    <ProjectDashboard
-      summary={{
-        project_id: 1,
-        pending_inbox_count: 0,
-        open_task_count: 0,
-        recent_note_count: 0,
-        recent_session_count: 0,
-      }}
-    />
+    <ProjectDashboard summary={dashboard} />
+    <section class="inbox-review" aria-label="项目 inbox">
+      <h2>AI 整理建议</h2>
+      <SuggestionList suggestions={sampleSuggestions} onConfirm={handleConfirm} />
+      <p class="selection-status" aria-live="polite">已选择 {selectedSuggestionCount} 项</p>
+    </section>
   </section>
 </main>
diff --git a/apps/web/src/features/inbox/SuggestionList.svelte b/apps/web/src/features/inbox/SuggestionList.svelte
index b95f0db..913d06b 100644
--- a/apps/web/src/features/inbox/SuggestionList.svelte
+++ b/apps/web/src/features/inbox/SuggestionList.svelte
@@ -1,9 +1,5 @@
 <script lang="ts">
-  export type Suggestion = {
-    kind: 'task' | 'note' | 'source';
-    title: string;
-    body: string;
-  };
+  import type { Suggestion } from './types';
 
   export let suggestions: Suggestion[] = [];
   export let onConfirm: (selected: Suggestion[]) => void;
diff --git a/apps/web/src/features/inbox/types.ts b/apps/web/src/features/inbox/types.ts
new file mode 100644
index 0000000..7ac3153
--- /dev/null
+++ b/apps/web/src/features/inbox/types.ts
@@ -0,0 +1,5 @@
+export type Suggestion = {
+  kind: 'task' | 'note' | 'source';
+  title: string;
+  body: string;
+};
diff --git a/apps/web/src/index.css b/apps/web/src/index.css
index c1686e6..7a1e945 100644
--- a/apps/web/src/index.css
+++ b/apps/web/src/index.css
@@ -41,9 +41,18 @@ select {
 }
 
 .workspace {
+  display: grid;
+  gap: 24px;
   padding: 24px;
 }
 
+.connection-status,
+.selection-status {
+  margin: 12px 0 0;
+  color: #5f6673;
+  font-size: 13px;
+}
+
 .server-login {
   display: grid;
   gap: 8px;
@@ -95,6 +104,51 @@ select {
   font-size: 28px;
 }
 
+.inbox-review {
+  display: grid;
+  gap: 12px;
+}
+
+.inbox-review h2 {
+  margin: 0;
+  font-size: 18px;
+}
+
+.suggestions {
+  display: grid;
+  gap: 10px;
+}
+
+.suggestion {
+  display: grid;
+  grid-template-columns: 20px 1fr;
+  gap: 10px;
+  align-items: start;
+  border: 1px solid #d9dde3;
+  border-radius: 8px;
+  background: white;
+  padding: 12px;
+}
+
+.suggestion-body {
+  display: grid;
+  gap: 4px;
+}
+
+.suggestion-body small {
+  color: #5f6673;
+}
+
+.suggestions button {
+  justify-self: start;
+  border: 1px solid #1f2937;
+  border-radius: 6px;
+  background: #1f2937;
+  color: white;
+  padding: 9px 12px;
+  cursor: pointer;
+}
+
 @media (max-width: 760px) {
   .shell {
     grid-template-columns: 1fr;
diff --git a/apps/web/src/lib/api.ts b/apps/web/src/lib/api.ts
index c24f734..6f8db99 100644
--- a/apps/web/src/lib/api.ts
+++ b/apps/web/src/lib/api.ts
@@ -8,9 +8,11 @@ export type ProjectDashboardSummary = {
   recent_session_count: number;
 };
 
-export function createApi(apiBase: string) {
+export function createApi(apiBase: string, token?: string) {
   async function request<T>(path: string): Promise<T> {
-    const response = await fetch(`${apiBase}${path}`);
+    const response = await fetch(`${apiBase}/api${path}`, {
+      headers: token ? { Authorization: `Bearer ${token}` } : {},
+    });
     if (!response.ok) throw new Error(`API request failed: ${response.status}`);
     return response.json() as Promise<T>;
   }
diff --git a/apps/web/tsconfig.app.json b/apps/web/tsconfig.app.json
index 674775f..3446152 100644
--- a/apps/web/tsconfig.app.json
+++ b/apps/web/tsconfig.app.json
@@ -13,6 +13,5 @@
     "noEmit": true,
     "strict": true
   },
-  "include": ["src/**/*.d.ts", "src/**/*.ts", "src/**/*.js", "src/**/*.svelte"],
-  "references": [{ "path": "./tsconfig.node.json" }]
+  "include": ["src/**/*.d.ts", "src/**/*.ts", "src/**/*.js", "src/**/*.svelte"]
 }
diff --git a/backend/cmd/api/main.go b/backend/cmd/api/main.go
index 9421c26..0707b17 100644
--- a/backend/cmd/api/main.go
+++ b/backend/cmd/api/main.go
@@ -3,6 +3,7 @@ package main
 import (
 	"log"
 
+	"senlinai-agent/backend/internal/auth"
 	"senlinai-agent/backend/internal/config"
 	"senlinai-agent/backend/internal/db"
 	"senlinai-agent/backend/internal/domain"
@@ -21,10 +22,11 @@ func main() {
 		log.Fatal(err)
 	}
 
+	authService := auth.NewService(database, cfg.AuthSecret)
 	projectHandler := projects.NewHandler(projects.NewService(database))
 	inboxHandler := inbox.NewHandler(inbox.NewService(database, inbox.StaticAnalyzer{}))
-	router := httpx.NewRouter(cfg, projectHandler, inboxHandler)
-	if err := router.Run(":8080"); err != nil {
+	router := httpx.NewProtectedRouter(cfg, authService.VerifySession, projectHandler, inboxHandler)
+	if err := router.Run(":" + cfg.Port); err != nil {
 		log.Fatal(err)
 	}
 }
diff --git a/backend/internal/ai/gateway.go b/backend/internal/ai/gateway.go
index 9567039..63f68da 100644
--- a/backend/internal/ai/gateway.go
+++ b/backend/internal/ai/gateway.go
@@ -1,15 +1,24 @@
 package ai
 
 import (
+	"crypto/aes"
+	"crypto/cipher"
+	"crypto/rand"
+	"crypto/sha256"
+	"encoding/base64"
 	"errors"
+	"io"
+	"time"
 
 	"gorm.io/gorm"
+	"gorm.io/gorm/clause"
 	"senlinai-agent/backend/internal/domain"
 )
 
 type Gateway struct {
-	db        *gorm.DB
-	systemKey string
+	db               *gorm.DB
+	systemKey        string
+	encryptionSecret string
 }
 
 type SelectedKey struct {
@@ -19,13 +28,33 @@ type SelectedKey struct {
 }
 
 func NewGateway(database *gorm.DB, systemKey string) *Gateway {
-	return &Gateway{db: database, systemKey: systemKey}
+	return NewGatewayWithSecret(database, systemKey, "development-ai-key-secret-change-me")
+}
+
+func NewGatewayWithSecret(database *gorm.DB, systemKey string, encryptionSecret string) *Gateway {
+	return &Gateway{db: database, systemKey: systemKey, encryptionSecret: encryptionSecret}
+}
+
+func (g *Gateway) SaveUserKey(userID uint, provider string, apiKey string) error {
+	encrypted, err := encryptAPIKey(apiKey, g.encryptionSecret)
+	if err != nil {
+		return err
+	}
+	key := domain.AIKey{UserID: userID, Provider: provider, EncryptedAPIKey: encrypted}
+	return g.db.Clauses(clause.OnConflict{
+		Columns:   []clause.Column{{Name: "user_id"}},
+		DoUpdates: clause.AssignmentColumns([]string{"provider", "encrypted_api_key", "updated_at"}),
+	}).Create(&key).Error
 }
 
 func (g *Gateway) SelectKey(userID uint) (SelectedKey, error) {
 	var userKey domain.AIKey
 	if err := g.db.Where("user_id = ?", userID).First(&userKey).Error; err == nil {
-		return SelectedKey{Provider: userKey.Provider, APIKey: userKey.EncryptedAPIKey, KeyType: "user"}, nil
+		apiKey, err := decryptAPIKey(userKey.EncryptedAPIKey, g.encryptionSecret)
+		if err != nil {
+			return SelectedKey{}, err
+		}
+		return SelectedKey{Provider: userKey.Provider, APIKey: apiKey, KeyType: "user"}, nil
 	}
 	if g.systemKey == "" {
 		return SelectedKey{}, errors.New("no ai key available")
@@ -43,3 +72,72 @@ func (g *Gateway) RecordCall(userID uint, provider string, usedKeyType string, a
 		Error:       errText,
 	}).Error
 }
+
+func (g *Gateway) CheckRateLimit(userID uint, action string, limit int, window time.Duration) error {
+	if limit <= 0 {
+		return nil
+	}
+	var count int64
+	if err := g.db.Model(&domain.AICallLog{}).
+		Where("user_id = ? AND action = ? AND created_at >= ?", userID, action, time.Now().Add(-window)).
+		Count(&count).Error; err != nil {
+		return err
+	}
+	if count >= int64(limit) {
+		return errors.New("ai rate limit exceeded")
+	}
+	return nil
+}
+
+func encryptAPIKey(apiKey string, secret string) (string, error) {
+	if apiKey == "" {
+		return "", errors.New("api key is required")
+	}
+	block, err := aes.NewCipher(encryptionKey(secret))
+	if err != nil {
+		return "", err
+	}
+	gcm, err := cipher.NewGCM(block)
+	if err != nil {
+		return "", err
+	}
+	nonce := make([]byte, gcm.NonceSize())
+	if _, err := io.ReadFull(rand.Reader, nonce); err != nil {
+		return "", err
+	}
+	ciphertext := gcm.Seal(nil, nonce, []byte(apiKey), nil)
+	return "v1:" + base64.RawURLEncoding.EncodeToString(append(nonce, ciphertext...)), nil
+}
+
+func decryptAPIKey(encrypted string, secret string) (string, error) {
+	if len(encrypted) < 3 || encrypted[:3] != "v1:" {
+		return encrypted, nil
+	}
+	raw, err := base64.RawURLEncoding.DecodeString(encrypted[3:])
+	if err != nil {
+		return "", errors.New("invalid encrypted api key")
+	}
+	block, err := aes.NewCipher(encryptionKey(secret))
+	if err != nil {
+		return "", err
+	}
+	gcm, err := cipher.NewGCM(block)
+	if err != nil {
+		return "", err
+	}
+	if len(raw) < gcm.NonceSize() {
+		return "", errors.New("invalid encrypted api key")
+	}
+	nonce := raw[:gcm.NonceSize()]
+	ciphertext := raw[gcm.NonceSize():]
+	plaintext, err := gcm.Open(nil, nonce, ciphertext, nil)
+	if err != nil {
+		return "", errors.New("invalid encrypted api key")
+	}
+	return string(plaintext), nil
+}
+
+func encryptionKey(secret string) []byte {
+	sum := sha256.Sum256([]byte(secret))
+	return sum[:]
+}
diff --git a/backend/internal/ai/gateway_test.go b/backend/internal/ai/gateway_test.go
index 967c446..38776f3 100644
--- a/backend/internal/ai/gateway_test.go
+++ b/backend/internal/ai/gateway_test.go
@@ -3,6 +3,7 @@ package ai
 import (
 	"fmt"
 	"testing"
+	"time"
 
 	"github.com/glebarez/sqlite"
 	"github.com/stretchr/testify/require"
@@ -22,6 +23,21 @@ func TestSelectKeyPrefersUserKey(t *testing.T) {
 	require.Equal(t, "user-key", selected.APIKey)
 }
 
+func TestSaveUserKeyEncryptsStoredKey(t *testing.T) {
+	database := newTestDB(t)
+	gateway := NewGatewayWithSecret(database, "system-key", "test-encryption-secret")
+
+	require.NoError(t, gateway.SaveUserKey(3, "openai", "user-key"))
+
+	var stored domain.AIKey
+	require.NoError(t, database.Where("user_id = ?", 3).First(&stored).Error)
+	require.NotEqual(t, "user-key", stored.EncryptedAPIKey)
+	require.Contains(t, stored.EncryptedAPIKey, "v1:")
+	selected, err := gateway.SelectKey(3)
+	require.NoError(t, err)
+	require.Equal(t, "user-key", selected.APIKey)
+}
+
 func TestSelectKeyFallsBackToSystemKey(t *testing.T) {
 	database := newTestDB(t)
 	gateway := NewGateway(database, "system-key")
@@ -58,6 +74,16 @@ func TestRecordCallStoresAuditFields(t *testing.T) {
 	require.Equal(t, "rate limited", log.Error)
 }
 
+func TestCheckRateLimitRejectsCallsOverWindow(t *testing.T) {
+	database := newTestDB(t)
+	gateway := NewGateway(database, "system-key")
+	require.NoError(t, gateway.RecordCall(3, "openai", "system", "inbox_analyze", "succeeded", ""))
+
+	err := gateway.CheckRateLimit(3, "inbox_analyze", 1, time.Hour)
+
+	require.ErrorContains(t, err, "ai rate limit exceeded")
+}
+
 func TestCreateAISession(t *testing.T) {
 	database := newTestDB(t)
 	service := NewSessionService(database)
diff --git a/backend/internal/auth/middleware.go b/backend/internal/auth/middleware.go
index 446de54..92a7fb7 100644
--- a/backend/internal/auth/middleware.go
+++ b/backend/internal/auth/middleware.go
@@ -26,3 +26,12 @@ func RequireUser(tokenVerifier func(string) (uint, error)) gin.HandlerFunc {
 		c.Next()
 	}
 }
+
+func CurrentUserID(c *gin.Context) (uint, bool) {
+	value, ok := c.Get(CurrentUserIDKey)
+	if !ok {
+		return 0, false
+	}
+	userID, ok := value.(uint)
+	return userID, ok && userID > 0
+}
diff --git a/backend/internal/auth/service.go b/backend/internal/auth/service.go
index 7fc0a8b..061baf1 100644
--- a/backend/internal/auth/service.go
+++ b/backend/internal/auth/service.go
@@ -3,10 +3,13 @@ package auth
 import (
 	"crypto/hmac"
 	"crypto/sha256"
+	"encoding/base64"
 	"encoding/hex"
+	"encoding/json"
 	"errors"
 	"fmt"
 	"strings"
+	"time"
 
 	"golang.org/x/crypto/bcrypt"
 	"gorm.io/gorm"
@@ -14,12 +17,14 @@ import (
 )
 
 type Service struct {
-	db     *gorm.DB
-	secret string
+	db             *gorm.DB
+	secret         string
+	inviteTokenTTL time.Duration
+	sessionTTL     time.Duration
 }
 
 func NewService(database *gorm.DB, secret string) *Service {
-	return &Service{db: database, secret: secret}
+	return &Service{db: database, secret: secret, inviteTokenTTL: 7 * 24 * time.Hour, sessionTTL: 24 * time.Hour}
 }
 
 func (s *Service) CreateInvite(adminID uint, email string) (string, error) {
@@ -27,20 +32,20 @@ func (s *Service) CreateInvite(adminID uint, email string) (string, error) {
 	if normalized == "" {
 		return "", errors.New("email is required")
 	}
-	return normalized + "." + s.sign(normalized), nil
+	return s.signToken(tokenPayload{
+		Type:      "invite",
+		Subject:   normalized,
+		IssuerID:  adminID,
+		ExpiresAt: time.Now().Add(s.inviteTokenTTL).Unix(),
+	})
 }
 
 func (s *Service) RegisterWithInvite(token, email, displayName, password string) (*domain.User, error) {
-	separator := strings.LastIndex(token, ".")
-	if separator < 1 || separator == len(token)-1 {
-		return nil, errors.New("invalid invite token")
+	payload, err := s.verifyToken(token, "invite")
+	if err != nil {
+		return nil, err
 	}
-	inviteEmail := token[:separator]
-	signature := token[separator+1:]
-	if !hmac.Equal([]byte(signature), []byte(s.sign(inviteEmail))) {
-		return nil, errors.New("invalid invite signature")
-	}
-	if inviteEmail != strings.ToLower(strings.TrimSpace(email)) {
+	if payload.Subject != strings.ToLower(strings.TrimSpace(email)) {
 		return nil, errors.New("invite email mismatch")
 	}
 	hash, err := bcrypt.GenerateFromPassword([]byte(password), bcrypt.DefaultCost)
@@ -48,7 +53,7 @@ func (s *Service) RegisterWithInvite(token, email, displayName, password string)
 		return nil, err
 	}
 	user := &domain.User{
-		Email:        inviteEmail,
+		Email:        payload.Subject,
 		DisplayName:  strings.TrimSpace(displayName),
 		PasswordHash: string(hash),
 		Role:         "user",
@@ -64,7 +69,66 @@ func (s *Service) Login(email, password string) (string, error) {
 	if err := bcrypt.CompareHashAndPassword([]byte(user.PasswordHash), []byte(password)); err != nil {
 		return "", errors.New("invalid credentials")
 	}
-	return fmt.Sprintf("user:%d", user.ID), nil
+	return s.signToken(tokenPayload{
+		Type:      "session",
+		Subject:   fmt.Sprintf("%d", user.ID),
+		ExpiresAt: time.Now().Add(s.sessionTTL).Unix(),
+	})
+}
+
+func (s *Service) VerifySession(token string) (uint, error) {
+	payload, err := s.verifyToken(token, "session")
+	if err != nil {
+		return 0, err
+	}
+	var userID uint
+	if _, err := fmt.Sscanf(payload.Subject, "%d", &userID); err != nil || userID == 0 {
+		return 0, errors.New("invalid session subject")
+	}
+	return userID, nil
+}
+
+type tokenPayload struct {
+	Type      string `json:"type"`
+	Subject   string `json:"subject"`
+	IssuerID  uint   `json:"issuer_id,omitempty"`
+	ExpiresAt int64  `json:"expires_at"`
+}
+
+func (s *Service) signToken(payload tokenPayload) (string, error) {
+	body, err := json.Marshal(payload)
+	if err != nil {
+		return "", err
+	}
+	encoded := base64.RawURLEncoding.EncodeToString(body)
+	return encoded + "." + s.sign(encoded), nil
+}
+
+func (s *Service) verifyToken(token string, expectedType string) (tokenPayload, error) {
+	separator := strings.LastIndex(token, ".")
+	if separator < 1 || separator == len(token)-1 {
+		return tokenPayload{}, errors.New("invalid token")
+	}
+	encoded := token[:separator]
+	signature := token[separator+1:]
+	if !hmac.Equal([]byte(signature), []byte(s.sign(encoded))) {
+		return tokenPayload{}, errors.New("invalid token signature")
+	}
+	body, err := base64.RawURLEncoding.DecodeString(encoded)
+	if err != nil {
+		return tokenPayload{}, errors.New("invalid token payload")
+	}
+	var payload tokenPayload
+	if err := json.Unmarshal(body, &payload); err != nil {
+		return tokenPayload{}, errors.New("invalid token payload")
+	}
+	if payload.Type != expectedType {
+		return tokenPayload{}, errors.New("invalid token type")
+	}
+	if payload.ExpiresAt <= time.Now().Unix() {
+		return tokenPayload{}, errors.New("token expired")
+	}
+	return payload, nil
 }
 
 func (s *Service) sign(value string) string {
diff --git a/backend/internal/auth/service_test.go b/backend/internal/auth/service_test.go
index 902e57d..d99751e 100644
--- a/backend/internal/auth/service_test.go
+++ b/backend/internal/auth/service_test.go
@@ -48,6 +48,32 @@ func TestLoginRejectsInvalidPassword(t *testing.T) {
 	require.ErrorContains(t, err, "invalid credentials")
 }
 
+func TestLoginReturnsSignedSessionToken(t *testing.T) {
+	database := newTestDB(t)
+	service := NewService(database, "test-secret")
+	token, err := service.CreateInvite(1, "lead@example.com")
+	require.NoError(t, err)
+	user, err := service.RegisterWithInvite(token, "lead@example.com", "Lead", "password123")
+	require.NoError(t, err)
+
+	sessionToken, err := service.Login("lead@example.com", "password123")
+	require.NoError(t, err)
+	userID, err := service.VerifySession(sessionToken)
+
+	require.NoError(t, err)
+	require.Equal(t, user.ID, userID)
+	require.NotEqual(t, fmt.Sprintf("user:%d", user.ID), sessionToken)
+}
+
+func TestVerifySessionRejectsForgeableLegacyToken(t *testing.T) {
+	database := newTestDB(t)
+	service := NewService(database, "test-secret")
+
+	_, err := service.VerifySession("user:1")
+
+	require.ErrorContains(t, err, "invalid token")
+}
+
 func newTestDB(t *testing.T) *gorm.DB {
 	t.Helper()
 	database, err := gorm.Open(sqlite.Open(fmt.Sprintf("file:%s?mode=memory&cache=shared", t.Name())), &gorm.Config{})
diff --git a/backend/internal/config/config.go b/backend/internal/config/config.go
index 31ce2d3..b78875d 100644
--- a/backend/internal/config/config.go
+++ b/backend/internal/config/config.go
@@ -3,18 +3,24 @@ package config
 import "os"
 
 type Config struct {
-	Env         string
-	DatabaseURL string
-	StorageDir  string
-	SystemAIKey string
+	Env                   string
+	Port                  string
+	DatabaseURL           string
+	StorageDir            string
+	AuthSecret            string
+	SystemAIKey           string
+	AIKeyEncryptionSecret string
 }
 
 func Load() Config {
 	return Config{
-		Env:         getenv("APP_ENV", "development"),
-		DatabaseURL: getenv("DATABASE_URL", "postgres://agent:agent@localhost:5432/agent?sslmode=disable"),
-		StorageDir:  getenv("STORAGE_DIR", "./data/files"),
-		SystemAIKey: os.Getenv("SYSTEM_AI_KEY"),
+		Env:                   getenv("APP_ENV", "development"),
+		Port:                  getenv("PORT", "8080"),
+		DatabaseURL:           getenv("DATABASE_URL", "postgres://agent:agent@localhost:5432/agent?sslmode=disable"),
+		StorageDir:            getenv("STORAGE_DIR", "./data/files"),
+		AuthSecret:            getenv("AUTH_SECRET", "development-auth-secret-change-me"),
+		SystemAIKey:           os.Getenv("SYSTEM_AI_KEY"),
+		AIKeyEncryptionSecret: getenv("AI_KEY_ENCRYPTION_SECRET", "development-ai-key-secret-change-me"),
 	}
 }
 
diff --git a/backend/internal/domain/models.go b/backend/internal/domain/models.go
index 1a74fa7..717f167 100644
--- a/backend/internal/domain/models.go
+++ b/backend/internal/domain/models.go
@@ -38,40 +38,43 @@ type InboxItem struct {
 }
 
 type Task struct {
-	ID          uint   `gorm:"primaryKey"`
-	ProjectID   uint   `gorm:"index;not null"`
-	CreatedBy   uint   `gorm:"index;not null"`
-	AssigneeID  *uint  `gorm:"index"`
-	Title       string `gorm:"not null"`
-	Description string
-	Status      string `gorm:"not null;default:open"`
-	SortOrder   int    `gorm:"not null;default:0"`
-	DueAt       *time.Time
-	CreatedAt   time.Time
-	UpdatedAt   time.Time
+	ID                uint   `gorm:"primaryKey"`
+	ProjectID         uint   `gorm:"index;not null"`
+	CreatedBy         uint   `gorm:"index;not null"`
+	AssigneeID        *uint  `gorm:"index"`
+	SourceInboxItemID *uint  `gorm:"index"`
+	Title             string `gorm:"not null"`
+	Description       string
+	Status            string `gorm:"not null;default:open"`
+	SortOrder         int    `gorm:"not null;default:0"`
+	DueAt             *time.Time
+	CreatedAt         time.Time
+	UpdatedAt         time.Time
 }
 
 type Note struct {
-	ID        uint   `gorm:"primaryKey"`
-	ProjectID uint   `gorm:"index;not null"`
-	CreatedBy uint   `gorm:"index;not null"`
-	Title     string `gorm:"not null"`
-	Markdown  string `gorm:"type:text"`
-	CreatedAt time.Time
-	UpdatedAt time.Time
+	ID                uint   `gorm:"primaryKey"`
+	ProjectID         uint   `gorm:"index;not null"`
+	CreatedBy         uint   `gorm:"index;not null"`
+	SourceInboxItemID *uint  `gorm:"index"`
+	Title             string `gorm:"not null"`
+	Markdown          string `gorm:"type:text"`
+	CreatedAt         time.Time
+	UpdatedAt         time.Time
 }
 
 type Source struct {
-	ID          uint   `gorm:"primaryKey"`
-	ProjectID   uint   `gorm:"index;not null"`
-	CreatedBy   uint   `gorm:"index;not null"`
-	Kind        string `gorm:"not null"`
-	Title       string `gorm:"not null"`
-	URL         string
-	FilePath    string
-	ContentText string `gorm:"type:text"`
-	CreatedAt   time.Time
-	UpdatedAt   time.Time
+	ID                uint   `gorm:"primaryKey"`
+	ProjectID         uint   `gorm:"index;not null"`
+	CreatedBy         uint   `gorm:"index;not null"`
+	SourceInboxItemID *uint  `gorm:"index"`
+	Kind              string `gorm:"not null"`
+	Title             string `gorm:"not null"`
+	URL               string
+	FilePath          string
+	ContentText       string `gorm:"type:text"`
+	CreatedAt         time.Time
+	UpdatedAt         time.Time
 }
 
 type AISession struct {
diff --git a/backend/internal/httpx/router.go b/backend/internal/httpx/router.go
index b909d1e..0f62848 100644
--- a/backend/internal/httpx/router.go
+++ b/backend/internal/httpx/router.go
@@ -4,6 +4,7 @@ import (
 	"net/http"
 
 	"github.com/gin-gonic/gin"
+	"senlinai-agent/backend/internal/auth"
 	"senlinai-agent/backend/internal/config"
 )
 
@@ -12,6 +13,14 @@ type RouteRegistrar interface {
 }
 
 func NewRouter(cfg config.Config, registrars ...RouteRegistrar) *gin.Engine {
+	return newRouter(cfg, nil, registrars...)
+}
+
+func NewProtectedRouter(cfg config.Config, tokenVerifier func(string) (uint, error), registrars ...RouteRegistrar) *gin.Engine {
+	return newRouter(cfg, tokenVerifier, registrars...)
+}
+
+func newRouter(cfg config.Config, tokenVerifier func(string) (uint, error), registrars ...RouteRegistrar) *gin.Engine {
 	if cfg.Env == "test" {
 		gin.SetMode(gin.TestMode)
 	}
@@ -23,6 +32,9 @@ func NewRouter(cfg config.Config, registrars ...RouteRegistrar) *gin.Engine {
 		c.JSON(http.StatusOK, gin.H{"status": "ok"})
 	})
 	api := router.Group("/api")
+	if tokenVerifier != nil {
+		api.Use(auth.RequireUser(tokenVerifier))
+	}
 	for _, registrar := range registrars {
 		registrar.Register(api)
 	}
diff --git a/backend/internal/inbox/handlers.go b/backend/internal/inbox/handlers.go
index 1d866b5..d0d6ca5 100644
--- a/backend/internal/inbox/handlers.go
+++ b/backend/internal/inbox/handlers.go
@@ -5,6 +5,7 @@ import (
 	"strconv"
 
 	"github.com/gin-gonic/gin"
+	"senlinai-agent/backend/internal/auth"
 )
 
 type Handler struct {
@@ -22,6 +23,11 @@ func (h *Handler) Register(router gin.IRouter) {
 }
 
 func (h *Handler) capture(c *gin.Context) {
+	userID, ok := auth.CurrentUserID(c)
+	if !ok {
+		c.JSON(http.StatusUnauthorized, gin.H{"error": "missing current user"})
+		return
+	}
 	projectID, err := strconv.ParseUint(c.Param("projectID"), 10, 64)
 	if err != nil {
 		c.JSON(http.StatusBadRequest, gin.H{"error": "invalid project id"})
@@ -36,7 +42,7 @@ func (h *Handler) capture(c *gin.Context) {
 		c.JSON(http.StatusBadRequest, gin.H{"error": "invalid request"})
 		return
 	}
-	item, err := h.service.Capture(CaptureInput{ProjectID: uint(projectID), UserID: 1, SourceType: input.SourceType, Title: input.Title, Body: input.Body})
+	item, err := h.service.Capture(CaptureInput{ProjectID: uint(projectID), UserID: userID, SourceType: input.SourceType, Title: input.Title, Body: input.Body})
 	if err != nil {
 		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
 		return
@@ -45,12 +51,17 @@ func (h *Handler) capture(c *gin.Context) {
 }
 
 func (h *Handler) analyze(c *gin.Context) {
+	userID, ok := auth.CurrentUserID(c)
+	if !ok {
+		c.JSON(http.StatusUnauthorized, gin.H{"error": "missing current user"})
+		return
+	}
 	itemID, err := strconv.ParseUint(c.Param("id"), 10, 64)
 	if err != nil {
 		c.JSON(http.StatusBadRequest, gin.H{"error": "invalid inbox id"})
 		return
 	}
-	suggestions, err := h.service.Analyze(uint(itemID), 1)
+	suggestions, err := h.service.Analyze(uint(itemID), userID)
 	if err != nil {
 		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
 		return
diff --git a/backend/internal/inbox/service.go b/backend/internal/inbox/service.go
index da1059f..636c543 100644
--- a/backend/internal/inbox/service.go
+++ b/backend/internal/inbox/service.go
@@ -77,18 +77,19 @@ func (s *Service) Confirm(itemID uint, selected []Suggestion) error {
 		if err := tx.First(&item, itemID).Error; err != nil {
 			return err
 		}
+		sourceInboxItemID := item.ID
 		for _, suggestion := range selected {
 			switch suggestion.Kind {
 			case "task":
-				if err := tx.Create(&domain.Task{ProjectID: item.ProjectID, CreatedBy: item.CreatedBy, Title: suggestion.Title, Description: suggestion.Body}).Error; err != nil {
+				if err := tx.Create(&domain.Task{ProjectID: item.ProjectID, CreatedBy: item.CreatedBy, SourceInboxItemID: &sourceInboxItemID, Title: suggestion.Title, Description: suggestion.Body}).Error; err != nil {
 					return err
 				}
 			case "note":
-				if err := tx.Create(&domain.Note{ProjectID: item.ProjectID, CreatedBy: item.CreatedBy, Title: suggestion.Title, Markdown: suggestion.Body}).Error; err != nil {
+				if err := tx.Create(&domain.Note{ProjectID: item.ProjectID, CreatedBy: item.CreatedBy, SourceInboxItemID: &sourceInboxItemID, Title: suggestion.Title, Markdown: suggestion.Body}).Error; err != nil {
 					return err
 				}
 			case "source":
-				if err := tx.Create(&domain.Source{ProjectID: item.ProjectID, CreatedBy: item.CreatedBy, Kind: "link", Title: suggestion.Title, ContentText: suggestion.Body}).Error; err != nil {
+				if err := tx.Create(&domain.Source{ProjectID: item.ProjectID, CreatedBy: item.CreatedBy, SourceInboxItemID: &sourceInboxItemID, Kind: "link", Title: suggestion.Title, ContentText: suggestion.Body}).Error; err != nil {
 					return err
 				}
 			default:
diff --git a/backend/internal/inbox/service_test.go b/backend/internal/inbox/service_test.go
index 8850a0c..f7aefdf 100644
--- a/backend/internal/inbox/service_test.go
+++ b/backend/internal/inbox/service_test.go
@@ -44,6 +44,8 @@ func TestConfirmCreatesSelectedObjectsAndKeepsInboxItem(t *testing.T) {
 	require.NoError(t, database.Find(&tasks).Error)
 	require.Len(t, tasks, 1)
 	require.Equal(t, "跟进报价", tasks[0].Title)
+	require.NotNil(t, tasks[0].SourceInboxItemID)
+	require.Equal(t, item.ID, *tasks[0].SourceInboxItemID)
 	var reloaded domain.InboxItem
 	require.NoError(t, database.First(&reloaded, item.ID).Error)
 	require.Equal(t, "processed", reloaded.Status)
diff --git a/backend/internal/projects/handlers.go b/backend/internal/projects/handlers.go
index 9ff7ae6..8aa825b 100644
--- a/backend/internal/projects/handlers.go
+++ b/backend/internal/projects/handlers.go
@@ -5,6 +5,7 @@ import (
 	"strconv"
 
 	"github.com/gin-gonic/gin"
+	"senlinai-agent/backend/internal/auth"
 )
 
 type Handler struct {
@@ -22,6 +23,11 @@ func (h *Handler) Register(router gin.IRouter) {
 }
 
 func (h *Handler) createProject(c *gin.Context) {
+	userID, ok := auth.CurrentUserID(c)
+	if !ok {
+		c.JSON(http.StatusUnauthorized, gin.H{"error": "missing current user"})
+		return
+	}
 	var input struct {
 		Name        string `json:"name"`
 		Description string `json:"description"`
@@ -30,7 +36,7 @@ func (h *Handler) createProject(c *gin.Context) {
 		c.JSON(http.StatusBadRequest, gin.H{"error": "invalid request"})
 		return
 	}
-	project, err := h.service.CreateProject(1, input.Name, input.Description)
+	project, err := h.service.CreateProject(userID, input.Name, input.Description)
 	if err != nil {
 		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
 		return
@@ -39,7 +45,12 @@ func (h *Handler) createProject(c *gin.Context) {
 }
 
 func (h *Handler) listProjects(c *gin.Context) {
-	projects, err := h.service.ListProjects(1)
+	userID, ok := auth.CurrentUserID(c)
+	if !ok {
+		c.JSON(http.StatusUnauthorized, gin.H{"error": "missing current user"})
+		return
+	}
+	projects, err := h.service.ListProjects(userID)
 	if err != nil {
 		c.JSON(http.StatusInternalServerError, gin.H{"error": "failed to list projects"})
 		return
@@ -48,12 +59,17 @@ func (h *Handler) listProjects(c *gin.Context) {
 }
 
 func (h *Handler) dashboard(c *gin.Context) {
+	userID, ok := auth.CurrentUserID(c)
+	if !ok {
+		c.JSON(http.StatusUnauthorized, gin.H{"error": "missing current user"})
+		return
+	}
 	projectID, err := strconv.ParseUint(c.Param("id"), 10, 64)
 	if err != nil {
 		c.JSON(http.StatusBadRequest, gin.H{"error": "invalid project id"})
 		return
 	}
-	dashboard, err := h.service.Dashboard(uint(projectID))
+	dashboard, err := h.service.Dashboard(userID, uint(projectID))
 	if err != nil {
 		c.JSON(http.StatusInternalServerError, gin.H{"error": "failed to load dashboard"})
 		return
diff --git a/backend/internal/projects/service.go b/backend/internal/projects/service.go
index b50ba78..f453189 100644
--- a/backend/internal/projects/service.go
+++ b/backend/internal/projects/service.go
@@ -54,7 +54,11 @@ func (s *Service) ListTags(projectID uint) ([]domain.Tag, error) {
 	return tags, err
 }
 
-func (s *Service) Dashboard(projectID uint) (Dashboard, error) {
+func (s *Service) Dashboard(ownerID uint, projectID uint) (Dashboard, error) {
+	var project domain.Project
+	if err := s.db.Where("id = ? AND owner_id = ?", projectID, ownerID).First(&project).Error; err != nil {
+		return Dashboard{}, err
+	}
 	dashboard := Dashboard{ProjectID: projectID}
 	if err := s.db.Model(&domain.InboxItem{}).Where("project_id = ? AND status = ?", projectID, "open").Count(&dashboard.PendingInboxCount).Error; err != nil {
 		return dashboard, err
diff --git a/backend/internal/projects/service_test.go b/backend/internal/projects/service_test.go
index 3c16fd0..d936523 100644
--- a/backend/internal/projects/service_test.go
+++ b/backend/internal/projects/service_test.go
@@ -41,13 +41,24 @@ func TestDashboardCountsOnlyRequestedProject(t *testing.T) {
 	require.NoError(t, database.Create(&domain.Task{ProjectID: first.ID, CreatedBy: 1, Title: "A", Status: "open"}).Error)
 	require.NoError(t, database.Create(&domain.Task{ProjectID: second.ID, CreatedBy: 1, Title: "B", Status: "open"}).Error)
 
-	dashboard, err := service.Dashboard(first.ID)
+	dashboard, err := service.Dashboard(1, first.ID)
 
 	require.NoError(t, err)
 	require.Equal(t, int64(1), dashboard.PendingInboxCount)
 	require.Equal(t, int64(1), dashboard.OpenTaskCount)
 }
 
+func TestDashboardRejectsProjectOwnedByAnotherUser(t *testing.T) {
+	database := newTestDB(t)
+	service := NewService(database)
+	project, err := service.CreateProject(2, "Beta", "")
+	require.NoError(t, err)
+
+	_, err = service.Dashboard(1, project.ID)
+
+	require.Error(t, err)
+}
+
 func newTestDB(t *testing.T) *gorm.DB {
 	t.Helper()
 	database, err := gorm.Open(sqlite.Open(fmt.Sprintf("file:%s?mode=memory&cache=shared", t.Name())), &gorm.Config{})
diff --git a/backend/internal/tasks/service.go b/backend/internal/tasks/service.go
index 8bc65b4..9a9fc98 100644
--- a/backend/internal/tasks/service.go
+++ b/backend/internal/tasks/service.go
@@ -50,6 +50,9 @@ func (s *Service) ShareObject(taskID uint, objectType string, objectID uint) err
 		if err := tx.First(&task, taskID).Error; err != nil {
 			return err
 		}
+		if err := ensureSharedObjectInProject(tx, task.ProjectID, objectType, objectID); err != nil {
+			return err
+		}
 		if err := tx.Create(&domain.TaskShare{TaskID: taskID, ObjectType: objectType, ObjectID: objectID}).Error; err != nil {
 			return err
 		}
@@ -82,3 +85,25 @@ func (s *Service) VisibleLinkedObjects(taskID uint, viewerID uint) ([]LinkedObje
 	}
 	return objects, nil
 }
+
+func ensureSharedObjectInProject(tx *gorm.DB, projectID uint, objectType string, objectID uint) error {
+	switch objectType {
+	case "note":
+		var count int64
+		if err := tx.Model(&domain.Note{}).Where("id = ? AND project_id = ?", objectID, projectID).Count(&count).Error; err != nil {
+			return err
+		}
+		if count == 0 {
+			return errors.New("shared object not found in task project")
+		}
+	case "source":
+		var count int64
+		if err := tx.Model(&domain.Source{}).Where("id = ? AND project_id = ?", objectID, projectID).Count(&count).Error; err != nil {
+			return err
+		}
+		if count == 0 {
+			return errors.New("shared object not found in task project")
+		}
+	}
+	return nil
+}
diff --git a/backend/internal/tasks/service_test.go b/backend/internal/tasks/service_test.go
index 3a2eaf4..ac5b79e 100644
--- a/backend/internal/tasks/service_test.go
+++ b/backend/internal/tasks/service_test.go
@@ -40,6 +40,19 @@ func TestShareObjectRejectsUnsupportedType(t *testing.T) {
 	require.ErrorContains(t, err, "unsupported shared object type")
 }
 
+func TestShareObjectRejectsObjectFromAnotherProject(t *testing.T) {
+	database := newTestDB(t)
+	task := domain.Task{ProjectID: 1, CreatedBy: 1, Title: "Review"}
+	note := domain.Note{ProjectID: 2, CreatedBy: 1, Title: "Other project", Markdown: "Private context"}
+	require.NoError(t, database.Create(&task).Error)
+	require.NoError(t, database.Create(&note).Error)
+	service := NewService(database)
+
+	err := service.ShareObject(task.ID, "note", note.ID)
+
+	require.ErrorContains(t, err, "shared object not found in task project")
+}
+
 func TestAssignRecordsProjectEvent(t *testing.T) {
 	database := newTestDB(t)
 	task := domain.Task{ProjectID: 7, CreatedBy: 1, Title: "安排评审"}
diff --git a/docs/mvp-verification.md b/docs/mvp-verification.md
index bea5180..f1f94e7 100644
--- a/docs/mvp-verification.md
+++ b/docs/mvp-verification.md
@@ -32,12 +32,13 @@ Run:
 
 ```powershell
 Set-Location apps/web
+npx tsc --noEmit -p tsconfig.app.json
 npm test -- --run
 npm run build
 npx playwright test
 ```
 
-Expected: component tests, production build, and smoke test pass.
+Expected: TypeScript check, component tests, production build, and Playwright smoke/E2E tests pass.
 
 ## Desktop
 
@@ -54,8 +55,29 @@ Expected: Tauri desktop bundle builds when Rust/Cargo is installed and the stabl
 
 Current machine status:
 - `rustup` was installed through winget.
-- The stable toolchain install repeatedly timed out and currently reports `Missing manifest in toolchain 'stable-x86_64-pc-windows-msvc'`.
-- Desktop verification remains blocked until `rustup toolchain install stable-x86_64-pc-windows-msvc --profile minimal --force` completes successfully.
+- The latest desktop build attempt fails before project compilation because `cargo` is not available on PATH: `program not found`.
+- Desktop verification remains blocked until Rust/Cargo is installed and visible to the shell. Then run `npm run build` from `apps/desktop`.
+
+## Latest Audit Verification
+
+Last audited: 2026-07-18.
+
+- `backend`: `go test ./... -v` passed.
+- `apps/web`: `npx tsc --noEmit -p tsconfig.app.json` passed.
+- `apps/web`: `npm test -- --run` passed.
+- `apps/web`: `npm run build` passed.
+- `apps/web`: `npx playwright test` passed.
+- `apps/desktop`: `npm run build` blocked by missing Cargo/Rust toolchain on the current machine.
+
+Audit fixes included:
+
+- Signed expiring auth session tokens replaced forgeable `user:<id>` tokens.
+- Project and inbox HTTP handlers now read the authenticated user from bearer middleware instead of hard-coding user `1`.
+- Project dashboard loading now checks project ownership before returning counters.
+- Inbox confirmation preserves provenance with `source_inbox_item_id` on generated tasks, notes, and sources.
+- Task sharing now rejects note/source links from another project.
+- AI user keys are encrypted before storage, decrypted on selection, and can be checked with a per-user action rate limit.
+- Web API calls now use the backend `/api` prefix and the Svelte shell includes an inbox suggestion confirmation E2E path.
 
 ## Manual MVP Flow
 
diff --git a/docs/superpowers/plans/2026-07-18-project-workbench-mvp.md b/docs/superpowers/plans/2026-07-18-project-workbench-mvp.md
index c187695..7d7693a 100644
--- a/docs/superpowers/plans/2026-07-18-project-workbench-mvp.md
+++ b/docs/superpowers/plans/2026-07-18-project-workbench-mvp.md
@@ -676,3 +676,17 @@ Verification evidence from the latest run:
 - `apps/web`: `npm run build` passed.
 - `apps/web`: `npx playwright test` passed.
 - `apps/desktop`: `npm run build` is blocked before compilation by incomplete Rust stable toolchain.
+
+## 2026-07-18 Full Audit Follow-Up
+
+- [x] Backend API startup now wires PostgreSQL, AutoMigrate, project routes, and inbox routes through `/api`.
+- [x] Auth sessions are signed and expiring; legacy forgeable `user:<id>` tokens are rejected.
+- [x] Project and inbox HTTP handlers use the authenticated bearer-token user instead of a hard-coded user ID.
+- [x] Project dashboard reads are owner-scoped before counters are returned.
+- [x] Search now covers projects, tasks, notes, sources, inbox items, and AI sessions.
+- [x] Inbox confirmation keeps provenance through `source_inbox_item_id` on generated tasks, notes, and sources.
+- [x] Task sharing rejects note/source objects from a different project.
+- [x] AI user keys are encrypted at rest and gateway rate-limit checks are covered by tests.
+- [x] Svelte web client calls the backend `/api` prefix, passes type checking, and has Playwright coverage for inbox suggestion confirmation.
+- [x] Current Markdown docs no longer include the live PostgreSQL test credential; integration tests must receive it through `DATABASE_URL`.
+- [ ] Desktop binary build remains blocked on this machine because Cargo/Rust is not available to the shell. Install a complete Rust stable toolchain, then rerun `npm run build` from `apps/desktop`.