feat: integrate nightly survey system into app (#8480)

## Summary

Wires the nightly survey system into the app by adding a controller
component and a convenience composable for feature-site usage tracking.

## Changes

- **What**: NightlySurveyController iterates enabled surveys from the
registry and renders a NightlySurveyPopover for each.
useSurveyFeatureTracking wraps useFeatureUsageTracker with a
config-enabled guard for use at feature call sites.
- **Tree-shaking**: Controller is loaded via defineAsyncComponent behind
a compile-time isNightly/isCloud/isDesktop guard in SideToolbar.vue, so
the entire survey module subtree is eliminated from cloud/desktop/stable
builds.

## Review Focus

- DCE pattern: controller imported conditionally via
defineAsyncComponent + distribution guard (same pattern as
ComfyRunButton/index.ts)
- useSurveyFeatureTracking short-circuits early when config is
absent/disabled (avoids initializing tracker storage)
- No user-facing behavior change: FEATURE_SURVEYS registry is still
empty

## Part of Nightly Survey System

This is part 5 of a stacked PR chain:
1. feat/feature-usage-tracker - useFeatureUsageTracker (merged in #8189)
2. feat/survey-eligibility - useSurveyEligibility (#8189, merged)
3. feat/survey-config - surveyRegistry.ts (#8355, merged)
4. feat/survey-popover - NightlySurveyPopover.vue (#9083, merged)
5. **feat/survey-integration** - NightlySurveyController.vue (this PR)

---------

Co-authored-by: GitHub Action <action@github.com>

src/components/sidebar/SideToolbar.vue

@@ -48,13 +48,24 @@
       </div>
     </div>
     <HelpCenterPopups :is-small="isSmall" />
+    <Suspense v-if="NightlySurveyController">
+      <component :is="NightlySurveyController" />
+    </Suspense>
   </nav>
 </template>
 
 <script setup lang="ts">
 import { useResizeObserver } from '@vueuse/core'
 import { debounce } from 'es-toolkit/compat'
-import { computed, nextTick, onBeforeUnmount, onMounted, ref, watch } from 'vue'
+import {
+  computed,
+  defineAsyncComponent,
+  nextTick,
+  onBeforeUnmount,
+  onMounted,
+  ref,
+  watch
+} from 'vue'
 import { useI18n } from 'vue-i18n'
 
 import HelpCenterPopups from '@/components/helpcenter/HelpCenterPopups.vue'
@@ -62,7 +73,7 @@ import ComfyMenuButton from '@/components/sidebar/ComfyMenuButton.vue'
 import SidebarBottomPanelToggleButton from '@/components/sidebar/SidebarBottomPanelToggleButton.vue'
 import SidebarSettingsButton from '@/components/sidebar/SidebarSettingsButton.vue'
 import SidebarShortcutsToggleButton from '@/components/sidebar/SidebarShortcutsToggleButton.vue'
-import { isCloud } from '@/platform/distribution/types'
+import { isCloud, isDesktop, isNightly } from '@/platform/distribution/types'
 import { useSettingStore } from '@/platform/settings/settingStore'
 import { useTelemetry } from '@/platform/telemetry'
 import { useCanvasStore } from '@/renderer/core/canvas/canvasStore'
@@ -78,6 +89,13 @@ import SidebarIcon from './SidebarIcon.vue'
 import SidebarLogoutIcon from './SidebarLogoutIcon.vue'
 import SidebarTemplatesButton from './SidebarTemplatesButton.vue'
 
+const NightlySurveyController =
+  isNightly && !isCloud && !isDesktop
+    ? defineAsyncComponent(
+        () => import('@/platform/surveys/NightlySurveyController.vue')
+      )
+    : undefined
+
 const { t } = useI18n()
 const workspaceStore = useWorkspaceStore()
 const settingStore = useSettingStore()