[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/platform/updates/common/releaseStore.ts

@@ -1,11 +1,12 @@
 import { until } from '@vueuse/core'
 import { defineStore } from 'pinia'
+import { compare } from 'semver'
 import { computed, ref } from 'vue'
 
 import { useSettingStore } from '@/platform/settings/settingStore'
 import { useSystemStatsStore } from '@/stores/systemStatsStore'
 import { isElectron } from '@/utils/envUtil'
-import { compareVersions, stringToLocale } from '@/utils/formatUtil'
+import { stringToLocale } from '@/utils/formatUtil'
 
 import { type ReleaseNote, useReleaseService } from './releaseService'
 
@@ -56,16 +57,19 @@ export const useReleaseStore = defineStore('release', () => {
   const isNewVersionAvailable = computed(
     () =>
       !!recentRelease.value &&
-      compareVersions(
+      compare(
         recentRelease.value.version,
-        currentComfyUIVersion.value
+        currentComfyUIVersion.value || '0.0.0'
       ) > 0
   )
 
   const isLatestVersion = computed(
     () =>
       !!recentRelease.value &&
-      !compareVersions(recentRelease.value.version, currentComfyUIVersion.value)
+      compare(
+        recentRelease.value.version,
+        currentComfyUIVersion.value || '0.0.0'
+      ) === 0
   )
 
   const hasMediumOrHighAttention = computed(() =>

src/platform/updates/common/versionCompatibilityStore.ts

@@ -1,6 +1,6 @@
 import { until, useStorage } from '@vueuse/core'
 import { defineStore } from 'pinia'
-import * as semver from 'semver'
+import { gt, valid } from 'semver'
 import { computed } from 'vue'
 
 import config from '@/config'
@@ -26,13 +26,13 @@ export const useVersionCompatibilityStore = defineStore(
       if (
         !frontendVersion.value ||
         !requiredFrontendVersion.value ||
-        !semver.valid(frontendVersion.value) ||
-        !semver.valid(requiredFrontendVersion.value)
+        !valid(frontendVersion.value) ||
+        !valid(requiredFrontendVersion.value)
       ) {
         return false
       }
       // Returns true if required version is greater than frontend version
-      return semver.gt(requiredFrontendVersion.value, frontendVersion.value)
+      return gt(requiredFrontendVersion.value, frontendVersion.value)
     })
 
     const isFrontendNewer = computed(() => {