feat: add Logo C fill and Comfy wave loading indicator components (#9433)

## Summary

Add SVG-based brand loading indicators (LogoCFillLoader,
LogoComfyWaveLoader) and use the wave loader as the app loading screen.

## Changes

- **What**: New `LogoCFillLoader` (bottom-to-top fill, plays once) and
`LogoComfyWaveLoader` (wave water-fill animation) components with
`size`, `color`, `bordered`, and `disableAnimation` props. Move all
loaders from `components/common/` to `components/loader/`. Use
`LogoComfyWaveLoader` in `App.vue` and `WorkspaceAuthGate.vue`. Render
loader above BlockUI overlay (z-1200) to prevent dim wash-out.
- **Dependencies**: None

## Review Focus

- SVG mask-based animation approach using `currentColor` for flexible
theming
- z-index layering: loader at z-1200 renders above PrimeVue BlockUI's
z-1100 modal overlay
- `disableAnimation` prop used in WorkspaceAuthGate to show static logo
outline during auth loading

## Screenshots (if applicable)

[loading_record.webm](https://github.com/user-attachments/assets/b34f7296-9904-4a42-9273-a7d5fda49d15)

Storybook stories added for both components under `Components/Loader/`.

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-9433-feat-add-Logo-C-fill-and-Comfy-wave-loading-indicator-components-31a6d73d3650811cacfdcf867b1f835f)
by [Unito](https://www.unito.io)

---------

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

src/platform/workspace/auth/WorkspaceAuthGate.vue

@@ -4,7 +4,7 @@
     v-else
     class="fixed inset-0 z-1100 flex items-center justify-center bg-(--p-mask-background)"
   >
-    <Loader size="lg" class="text-white" />
+    <LogoComfyWaveLoader size="xl" color="yellow" disable-animation />
   </div>
 </template>
 
@@ -22,7 +22,6 @@
  * instead of workspace tokens when the workspace feature is enabled.
  */
 import { promiseTimeout, until } from '@vueuse/core'
-import Loader from '@/components/common/Loader.vue'
 import { storeToRefs } from 'pinia'
 import { onMounted, ref } from 'vue'
 
@@ -31,6 +30,7 @@ import { isCloud } from '@/platform/distribution/types'
 import { refreshRemoteConfig } from '@/platform/remoteConfig/refreshRemoteConfig'
 import { useTeamWorkspaceStore } from '@/platform/workspace/stores/teamWorkspaceStore'
 import { useFirebaseAuthStore } from '@/stores/firebaseAuthStore'
+import LogoComfyWaveLoader from '@/components/loader/LogoComfyWaveLoader.vue'
 
 const FIREBASE_INIT_TIMEOUT_MS = 16_000
 const CONFIG_REFRESH_TIMEOUT_MS = 10_000