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/assets/components/ModelImportProgressDialog.vue

@@ -4,7 +4,7 @@ import Popover from 'primevue/popover'
 import { computed, ref } from 'vue'
 import { useI18n } from 'vue-i18n'
 
-import Loader from '@/components/common/Loader.vue'
+import Loader from '@/components/loader/Loader.vue'
 import HoneyToast from '@/components/honeyToast/HoneyToast.vue'
 import ProgressToastItem from '@/components/toast/ProgressToastItem.vue'
 import Button from '@/components/ui/button/Button.vue'