feat: Add Token Management UI

- Add SettingsTokens view at /settings/tokens
- Add TokenManager modal component for creating tokens
- Add token management functions to auth store (fetchTokens, generateToken, revokeToken)
- Add Settings link in header user dropdown
- Add ApiToken types to types/index.ts
- Route: GET /auth/tokens, POST /auth/token/generate, DELETE /auth/tokens/{id}

src/components/layout/Header.vue

@@ -39,6 +39,11 @@ function logout() {
   authStore.logout()
   router.push('/login')
 }
+
+function goToSettingsTokens() {
+  showUserMenu.value = false
+  router.push('/settings/tokens')
+}
 </script>
 
 <template>
@@ -104,6 +109,14 @@ function logout() {
               <small>{{ authStore.user?.role }}</small>
             </div>
             <hr class="header__dropdown-divider" />
+            <button class="header__dropdown-item" @click="goToSettingsTokens">
+              <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
+                <circle cx="12" cy="12" r="3"/>
+                <path d="M19.4 15a1.65 1.65 0 0 0 .33 1.82l.06.06a2 2 0 0 1 0 2.83 2 2 0 0 1-2.83 0l-.06-.06a1.65 1.65 0 0 0-1.82-.33 1.65 1.65 0 0 0-1 1.51V21a2 2 0 0 1-2 2 2 2 0 0 1-2-2v-.09A1.65 1.65 0 0 0 9 19.4a1.65 1.65 0 0 0-1.82.33l-.06.06a2 2 0 0 1-2.83 0 2 2 0 0 1 0-2.83l.06-.06a1.65 1.65 0 0 0 .33-1.82 1.65 1.65 0 0 0-1.51-1H3a2 2 0 0 1-2-2 2 2 0 0 1 2-2h.09A1.65 1.65 0 0 0 4.6 9a1.65 1.65 0 0 0-.33-1.82l-.06-.06a2 2 0 0 1 0-2.83 2 2 0 0 1 2.83 0l.06.06a1.65 1.65 0 0 0 1.82.33H9a1.65 1.65 0 0 0 1-1.51V3a2 2 0 0 1 2-2 2 2 0 0 1 2 2v.09a1.65 1.65 0 0 0 1 1.51 1.65 1.65 0 0 0 1.82-.33l.06-.06a2 2 0 0 1 2.83 0 2 2 0 0 1 0 2.83l-.06.06a1.65 1.65 0 0 0-.33 1.82V9a1.65 1.65 0 0 0 1.51 1H21a2 2 0 0 1 2 2 2 2 0 0 1-2 2h-.09a1.65 1.65 0 0 0-1.51 1z"/>
+              </svg>
+              API Tokens
+            </button>
+            <hr class="header__dropdown-divider" />
             <button class="header__dropdown-item" @click="logout">
               <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
                 <path d="M9 21H5a2 2 0 0 1-2-2V5a2 2 0 0 1 2-2h4"/>