[refactor] Manager dialog simplification (#8041)

## Summary
Simplifies the Manager dialog by consolidating components and using
BaseModalLayout with v-model support for right panel state.

## Changes
- **Consolidation**: Merged ManagerDialogContent, ManagerHeader,
ManagerNavSidebar, RegistrySearchBar, and SearchFilterDropdown into
single ManagerDialog component
- **Right panel**: Added v-model:rightPanelOpen to BaseModalLayout for
external panel state control; clicking a node card now auto-opens the
info panel
- **Cleanup**: Removed unused useResponsiveCollapse composable, TabItem
and SearchOption types
- **UI tweaks**: Moved action buttons (Install All/Update All) from
header-right-area to contentFilter area


[manager-capture.webm](https://github.com/user-attachments/assets/2dd6092a-965d-4885-8ba6-6a2cc51f024a)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-8041-refactor-Manager-dialog-simplification-2e86d73d3650815ba699e49a2748b682)
by [Unito](https://www.unito.io)

---------

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

src/workbench/extensions/manager/composables/nodePack/useMissingNodes.ts

@@ -14,7 +14,6 @@ import { useComfyManagerStore } from '@/workbench/extensions/manager/stores/comf
 
 /**
  * Composable to find missing NodePacks from workflow
- * Uses the same filtering approach as ManagerDialogContent.vue
  * Automatically fetches workflow pack data when initialized
  * This is a shared singleton composable - all components use the same instance
  */
@@ -25,7 +24,6 @@ export const useMissingNodes = createSharedComposable(() => {
   const { workflowPacks, isLoading, error, startFetchWorkflowPacks } =
     useWorkflowPacks()
 
-  // Same filtering logic as ManagerDialogContent.vue
   const filterMissingPacks = (packs: components['schemas']['Node'][]) =>
     packs.filter((pack) => !comfyManagerStore.isPackInstalled(pack.id))
 

src/workbench/extensions/manager/composables/nodePack/useUpdateAvailableNodes.ts

@@ -7,7 +7,6 @@ import { useComfyManagerStore } from '@/workbench/extensions/manager/stores/comf
 
 /**
  * Composable to find NodePacks that have updates available
- * Uses the same filtering approach as ManagerDialogContent.vue
  * Automatically fetches installed pack data when initialized
  */
 export const useUpdateAvailableNodes = () => {
@@ -34,7 +33,6 @@ export const useUpdateAvailableNodes = () => {
     return compare(latestVersion, installedVersion) > 0
   }
 
-  // Same filtering logic as ManagerDialogContent.vue
   const filterOutdatedPacks = (packs: components['schemas']['Node'][]) =>
     packs.filter(isOutdatedPack)