feat: improve multi-package selection handling (#5116)

* feat: improve multi-package selection handling

- Check each package individually for conflicts in install dialog
- Show only packages with actual conflicts in warning dialog
- Hide action buttons for mixed installed/uninstalled selections
- Display dynamic status based on selected packages priority
- Deduplicate conflict information across multiple packages
- Fix PackIcon blur background opacity

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

Co-Authored-By: Claude <noreply@anthropic.com>

* refactor: extract multi-package logic into reusable composables

- Create usePackageSelection composable for installation state management
- Create usePackageStatus composable for status priority logic
- Refactor InfoPanelMultiItem to use new composables
- Reduce component complexity by separating business logic
- Improve code reusability across components

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

Co-Authored-By: Claude <noreply@anthropic.com>

* fix: directory modified

* test: add comprehensive tests for multi-package selection composables

- Add tests for usePacksSelection composable
  - Test installation status filtering
  - Test selection state determination (all/none/mixed)
  - Test dynamic status changes

- Add tests for usePacksStatus composable
  - Test import failure detection
  - Test status priority handling
  - Test integration with conflict detection store

- Fix existing test mocking issues
  - Update es-toolkit/compat mock to use async import
  - Add Pinia setup for store-dependent tests
  - Update vue-i18n mock to preserve all exports

---------

Co-authored-by: Claude <noreply@anthropic.com>

src/components/dialog/content/manager/button/PackInstallButton.vue

@@ -27,6 +27,7 @@ import { computed } from 'vue'
 
 import IconTextButton from '@/components/button/IconTextButton.vue'
 import DotSpinner from '@/components/common/DotSpinner.vue'
+import { useConflictDetection } from '@/composables/useConflictDetection'
 import { t } from '@/i18n'
 import { useDialogService } from '@/services/dialogService'
 import { useComfyManagerStore } from '@/stores/comfyManagerStore'
@@ -96,15 +97,20 @@ const installAllPacks = async () => {
   if (!nodePacks?.length) return
 
   if (hasConflict && conflictInfo) {
-    const conflictedPackages: ConflictDetectionResult[] = nodePacks.map(
-      (pack) => ({
-        package_id: pack.id || '',
-        package_name: pack.name || '',
-        has_conflict: true,
-        conflicts: conflictInfo || [],
-        is_compatible: false
+    // Check each package individually for conflicts
+    const { checkNodeCompatibility } = useConflictDetection()
+    const conflictedPackages: ConflictDetectionResult[] = nodePacks
+      .map((pack) => {
+        const compatibilityCheck = checkNodeCompatibility(pack)
+        return {
+          package_id: pack.id || '',
+          package_name: pack.name || '',
+          has_conflict: compatibilityCheck.hasConflict,
+          conflicts: compatibilityCheck.conflicts,
+          is_compatible: !compatibilityCheck.hasConflict
+        }
       })
-    )
+      .filter((result) => result.has_conflict) // Only show packages with conflicts
 
     showNodeConflictDialog({
       conflictedPackages,