feat: add setMany to settingStore for batch setting updates (#8767)

## Summary
- Adds `setMany()` method to `settingStore` for updating multiple
settings in a single API call via the existing `storeSettings` endpoint
- Extracts shared setting-apply logic (`applySettingLocally`) to reduce
duplication between `set()` and `setMany()`
- Migrates all call sites where multiple settings were updated
sequentially to use `setMany()`

## Call sites updated
- `releaseStore.ts` — `handleSkipRelease`, `handleShowChangelog`,
`handleWhatsNewSeen` (3 settings each)
- `keybindingService.ts` — `persistUserKeybindings` (2 settings)
- `coreSettings.ts` — `NavigationMode.onChange` (2 settings)

## Test plan
- [x] Unit tests for `setMany` (batch update, skip unchanged, no-op when
unchanged)
- [x] Updated `releaseStore.test.ts` assertions to verify `setMany`
usage
- [x] Updated `useCoreCommands.test.ts` mock to include `setMany`
- [x] All existing tests pass
- [x] `pnpm typecheck`, `pnpm lint`, `pnpm format` pass

Fixes #1079

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-8767-feat-add-setMany-to-settingStore-for-batch-setting-updates-3036d73d36508161b8b6d298e1be1b7a)
by [Unito](https://www.unito.io)

src/platform/updates/common/releaseStore.test.ts

@@ -46,8 +46,9 @@ vi.mock('@/platform/settings/settingStore', () => {
     return null
   })
   const set = vi.fn()
+  const setMany = vi.fn()
   return {
-    useSettingStore: () => ({ get, set })
+    useSettingStore: () => ({ get, set, setMany })
   }
 })
 
@@ -534,18 +535,11 @@ describe('useReleaseStore', () => {
       const settingStore = useSettingStore()
       await store.handleSkipRelease('1.2.0')
 
-      expect(settingStore.set).toHaveBeenCalledWith(
-        'Comfy.Release.Version',
-        '1.2.0'
-      )
-      expect(settingStore.set).toHaveBeenCalledWith(
-        'Comfy.Release.Status',
-        'skipped'
-      )
-      expect(settingStore.set).toHaveBeenCalledWith(
-        'Comfy.Release.Timestamp',
-        expect.any(Number)
-      )
+      expect(settingStore.setMany).toHaveBeenCalledWith({
+        'Comfy.Release.Version': '1.2.0',
+        'Comfy.Release.Status': 'skipped',
+        'Comfy.Release.Timestamp': expect.any(Number)
+      })
     })
 
     it('should handle show changelog', async () => {
@@ -554,18 +548,11 @@ describe('useReleaseStore', () => {
       const settingStore = useSettingStore()
       await store.handleShowChangelog('1.2.0')
 
-      expect(settingStore.set).toHaveBeenCalledWith(
-        'Comfy.Release.Version',
-        '1.2.0'
-      )
-      expect(settingStore.set).toHaveBeenCalledWith(
-        'Comfy.Release.Status',
-        'changelog seen'
-      )
-      expect(settingStore.set).toHaveBeenCalledWith(
-        'Comfy.Release.Timestamp',
-        expect.any(Number)
-      )
+      expect(settingStore.setMany).toHaveBeenCalledWith({
+        'Comfy.Release.Version': '1.2.0',
+        'Comfy.Release.Status': 'changelog seen',
+        'Comfy.Release.Timestamp': expect.any(Number)
+      })
     })
 
     it('should handle whats new seen', async () => {
@@ -574,18 +561,11 @@ describe('useReleaseStore', () => {
       const settingStore = useSettingStore()
       await store.handleWhatsNewSeen('1.2.0')
 
-      expect(settingStore.set).toHaveBeenCalledWith(
-        'Comfy.Release.Version',
-        '1.2.0'
-      )
-      expect(settingStore.set).toHaveBeenCalledWith(
-        'Comfy.Release.Status',
-        "what's new seen"
-      )
-      expect(settingStore.set).toHaveBeenCalledWith(
-        'Comfy.Release.Timestamp',
-        expect.any(Number)
-      )
+      expect(settingStore.setMany).toHaveBeenCalledWith({
+        'Comfy.Release.Version': '1.2.0',
+        'Comfy.Release.Status': "what's new seen",
+        'Comfy.Release.Timestamp': expect.any(Number)
+      })
     })
   })
 

src/platform/updates/common/releaseStore.ts

@@ -208,9 +208,11 @@ export const useReleaseStore = defineStore('release', () => {
       return
     }
 
-    await settingStore.set('Comfy.Release.Version', version)
-    await settingStore.set('Comfy.Release.Status', 'skipped')
-    await settingStore.set('Comfy.Release.Timestamp', Date.now())
+    await settingStore.setMany({
+      'Comfy.Release.Version': version,
+      'Comfy.Release.Status': 'skipped',
+      'Comfy.Release.Timestamp': Date.now()
+    })
   }
 
   async function handleShowChangelog(version: string): Promise<void> {
@@ -218,9 +220,11 @@ export const useReleaseStore = defineStore('release', () => {
       return
     }
 
-    await settingStore.set('Comfy.Release.Version', version)
-    await settingStore.set('Comfy.Release.Status', 'changelog seen')
-    await settingStore.set('Comfy.Release.Timestamp', Date.now())
+    await settingStore.setMany({
+      'Comfy.Release.Version': version,
+      'Comfy.Release.Status': 'changelog seen',
+      'Comfy.Release.Timestamp': Date.now()
+    })
   }
 
   async function handleWhatsNewSeen(version: string): Promise<void> {
@@ -228,9 +232,11 @@ export const useReleaseStore = defineStore('release', () => {
       return
     }
 
-    await settingStore.set('Comfy.Release.Version', version)
-    await settingStore.set('Comfy.Release.Status', "what's new seen")
-    await settingStore.set('Comfy.Release.Timestamp', Date.now())
+    await settingStore.setMany({
+      'Comfy.Release.Version': version,
+      'Comfy.Release.Status': "what's new seen",
+      'Comfy.Release.Timestamp': Date.now()
+    })
   }
 
   // Fetch releases from API