[refactor] Replace manual semantic version utilities/functions with semver package (#5653)

## Summary
- Replace custom `compareVersions()` with `semver.compare()`
- Replace custom `isSemVer()` with `semver.valid()`  
- Remove deprecated version comparison functions from `formatUtil.ts`
- Update all version comparison logic across components and stores
- Fix tests to use semver mocking instead of formatUtil mocking

## Benefits
- **Industry standard**: Uses well-maintained, battle-tested `semver`
package
- **Better reliability**: Handles edge cases more robustly than custom
implementation
- **Consistent behavior**: All version comparisons now use the same
underlying logic
- **Type safety**: Better TypeScript support with proper semver types


Fixes #4787

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-5653-refactor-Replace-manual-semantic-version-utilities-functions-with-semver-package-2736d73d365081fb8498ee11cbcc10e2)
by [Unito](https://www.unito.io)

---------

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

src/workbench/extensions/manager/components/manager/PackVersionBadge.vue

@@ -43,11 +43,11 @@
 
 <script setup lang="ts">
 import Popover from 'primevue/popover'
+import { valid as validSemver } from 'semver'
 import { computed, ref, watch } from 'vue'
 
 import { usePackUpdateStatus } from '@/composables/nodePack/usePackUpdateStatus'
 import type { components } from '@/types/comfyRegistryTypes'
-import { isSemVer } from '@/utils/formatUtil'
 import PackVersionSelectorPopover from '@/workbench/extensions/manager/components/manager/PackVersionSelectorPopover.vue'
 import { useComfyManagerStore } from '@/workbench/extensions/manager/stores/comfyManagerStore'
 
@@ -81,7 +81,9 @@ const installedVersion = computed(() => {
     'nightly'
 
   // If Git hash, truncate to 7 characters
-  return isSemVer(version) ? version : version.slice(0, TRUNCATED_HASH_LENGTH)
+  return validSemver(version)
+    ? version
+    : version.slice(0, TRUNCATED_HASH_LENGTH)
 })
 
 const toggleVersionSelector = (event: Event) => {

src/workbench/extensions/manager/components/manager/PackVersionSelectorPopover.vue

@@ -84,6 +84,7 @@ import { whenever } from '@vueuse/core'
 import Button from 'primevue/button'
 import Listbox from 'primevue/listbox'
 import ProgressSpinner from 'primevue/progressspinner'
+import { valid as validSemver } from 'semver'
 import { computed, onMounted, ref } from 'vue'
 import { useI18n } from 'vue-i18n'
 
@@ -94,7 +95,6 @@ import { useConflictDetection } from '@/composables/useConflictDetection'
 import { useComfyRegistryService } from '@/services/comfyRegistryService'
 import type { components } from '@/types/comfyRegistryTypes'
 import { getJoinedConflictMessages } from '@/utils/conflictMessageUtil'
-import { isSemVer } from '@/utils/formatUtil'
 import { useComfyManagerStore } from '@/workbench/extensions/manager/stores/comfyManagerStore'
 import type { components as ManagerComponents } from '@/workbench/extensions/manager/types/generatedManagerTypes'
 
@@ -142,7 +142,7 @@ onMounted(() => {
     getInitialSelectedVersion() ?? SelectedVersionValues.LATEST
   selectedVersion.value =
     // Use NIGHTLY when version is a Git hash
-    isSemVer(initialVersion) ? initialVersion : SelectedVersionValues.NIGHTLY
+    validSemver(initialVersion) ? initialVersion : SelectedVersionValues.NIGHTLY
 })
 
 const getInitialSelectedVersion = () => {