diff --git a/web/features/new-rag/__tests__/knowledge-settings-form.spec.tsx b/web/features/new-rag/__tests__/knowledge-settings-form.spec.tsx
index 2c2a4bb4cfc..732f3d26214 100644
--- a/web/features/new-rag/__tests__/knowledge-settings-form.spec.tsx
+++ b/web/features/new-rag/__tests__/knowledge-settings-form.spec.tsx
@@ -362,11 +362,10 @@ describe('KnowledgeSettingsForm', () => {
     const nameInput = screen.getByRole('textbox', { name: 'datasetSettings.form.name' })
     await user.clear(nameInput)
     await user.type(nameInput, 'Updated camera specs')
-    await user.click(
-      screen.getByRole('button', {
-        name: 'dataset.newKnowledge.settings.saveChanges',
-      }),
-    )
+    const saveButton = screen.getByRole('button', {
+      name: 'dataset.newKnowledge.settings.saveChanges',
+    })
+    await user.click(saveButton)
 
     await waitFor(() => {
       expect(serviceMock.patchSpace).toHaveBeenCalledWith(
@@ -380,7 +379,7 @@ describe('KnowledgeSettingsForm', () => {
       )
     })
     expect(serviceMock.patchSettings).not.toHaveBeenCalled()
-    expect(toastMock.success).not.toHaveBeenCalled()
+    expect(toastMock.success).toHaveBeenCalledWith('common.api.actionSuccess')
   })
 
   it('finishes the basic info draft before refreshing saved server data', async () => {
@@ -433,6 +432,12 @@ describe('KnowledgeSettingsForm', () => {
     )
 
     await waitFor(() => expect(serviceMock.patchSpace).toHaveBeenCalledOnce())
+    const saveButton = screen.getByRole('button', {
+      name: 'dataset.newKnowledge.settings.saveChanges',
+    })
+    expect(saveButton).toHaveAttribute('aria-disabled', 'true')
+    expect(saveButton).toHaveTextContent('dataset.newKnowledge.settings.saveChanges')
+    expect(screen.queryByText('common.operation.saving')).not.toBeInTheDocument()
     const apiAccessSwitch = screen.getByRole('switch', {
       name: 'dataset.newKnowledge.apiAgentAccess',
     })
@@ -624,7 +629,74 @@ describe('KnowledgeSettingsForm', () => {
         name: 'dataset.newKnowledge.settings.saveChanges',
       }),
     ).toBeDisabled()
-    expect(toastMock.success).not.toHaveBeenCalled()
+    expect(toastMock.success).toHaveBeenCalledWith('common.api.actionSuccess')
+  })
+
+  it('keeps access channels submittable before the first model profile activates', async () => {
+    const user = userEvent.setup()
+    renderForm({
+      settings: {
+        ...settings,
+        active_profile_available: false,
+        active_profile_revisions: {},
+        capabilities: {
+          deep: false,
+          index: false,
+          ingest: true,
+          query: false,
+          research: false,
+          source_sync: true,
+        },
+      },
+    })
+
+    const apiAccessSwitch = screen.getByRole('switch', {
+      name: 'dataset.newKnowledge.apiAgentAccess',
+    })
+    const workflowAccessSwitch = screen.getByRole('switch', {
+      name: 'dataset.newKnowledge.workflowAccess',
+    })
+    expect(apiAccessSwitch).not.toHaveAttribute('aria-disabled', 'true')
+    expect(workflowAccessSwitch).not.toHaveAttribute('aria-disabled', 'true')
+    expect(apiAccessSwitch).toHaveAccessibleDescription(
+      'dataset.newKnowledge.settings.apiAccessDescription',
+    )
+
+    await user.click(apiAccessSwitch)
+
+    await waitFor(() => {
+      expect(serviceMock.patchExternalAccess).toHaveBeenCalledWith(
+        {
+          body: {
+            agent_enabled: false,
+            mcp_enabled: true,
+            service_api_enabled: false,
+            workflow_enabled: true,
+          },
+          params: { control_space_id: 'space-1' },
+        },
+        expect.anything(),
+      )
+    })
+    await waitFor(() => expect(apiAccessSwitch).toHaveAttribute('aria-checked', 'false'))
+    expect(apiAccessSwitch).not.toHaveAttribute('aria-disabled', 'true')
+    expect(workflowAccessSwitch).not.toHaveAttribute('aria-disabled', 'true')
+
+    await user.click(apiAccessSwitch)
+
+    await waitFor(() => expect(serviceMock.patchExternalAccess).toHaveBeenCalledTimes(2))
+    expect(serviceMock.patchExternalAccess).toHaveBeenLastCalledWith(
+      {
+        body: {
+          agent_enabled: true,
+          mcp_enabled: true,
+          service_api_enabled: true,
+          workflow_enabled: true,
+        },
+        params: { control_space_id: 'space-1' },
+      },
+      expect.anything(),
+    )
   })
 
   it('keeps unrelated form controls interactive while external access is saving', async () => {
@@ -732,7 +804,7 @@ describe('KnowledgeSettingsForm', () => {
     await waitFor(() => expect(workflowAccessSwitch).toHaveAttribute('aria-checked', 'true'))
   })
 
-  it('restores the Workflow access switch after failure and retries the intended value', async () => {
+  it('keeps the Workflow access edit and shows an error toast after failure', async () => {
     const user = userEvent.setup()
     serviceMock.patchExternalAccess.mockRejectedValueOnce(new Error('network error'))
     renderForm({
@@ -747,27 +819,14 @@ describe('KnowledgeSettingsForm', () => {
     })
     await user.click(workflowAccessSwitch)
 
-    expect(await screen.findByText('dataset.newKnowledge.settings.saveFailed')).toBeInTheDocument()
-    expect(workflowAccessSwitch).toHaveAttribute('aria-checked', 'false')
-    await user.click(screen.getByRole('button', { name: 'common.operation.retry' }))
-
-    await waitFor(() => expect(serviceMock.patchExternalAccess).toHaveBeenCalledTimes(2))
-    expect(serviceMock.patchExternalAccess).toHaveBeenLastCalledWith(
-      {
-        body: {
-          agent_enabled: true,
-          mcp_enabled: true,
-          service_api_enabled: true,
-          workflow_enabled: true,
-        },
-        params: { control_space_id: 'space-1' },
-      },
-      expect.anything(),
+    await waitFor(() =>
+      expect(toastMock.error).toHaveBeenCalledWith('dataset.newKnowledge.settings.saveFailed'),
     )
-    await waitFor(() => expect(workflowAccessSwitch).toHaveAttribute('aria-checked', 'true'))
+    expect(workflowAccessSwitch).toHaveAttribute('aria-checked', 'true')
+    expect(screen.queryByText('dataset.newKnowledge.settings.saveFailed')).not.toBeInTheDocument()
   })
 
-  it('restores the API access switch after failure and retries the intended value', async () => {
+  it('keeps the API access edit and shows an error toast after failure', async () => {
     const user = userEvent.setup()
     serviceMock.patchExternalAccess.mockRejectedValueOnce(new Error('network error'))
     renderForm({
@@ -784,24 +843,11 @@ describe('KnowledgeSettingsForm', () => {
     expect(apiAccessSwitch).toHaveAttribute('aria-checked', 'false')
     await user.click(apiAccessSwitch)
 
-    expect(await screen.findByText('dataset.newKnowledge.settings.saveFailed')).toBeInTheDocument()
-    expect(apiAccessSwitch).toHaveAttribute('aria-checked', 'false')
-    await user.click(screen.getByRole('button', { name: 'common.operation.retry' }))
-
-    await waitFor(() => expect(serviceMock.patchExternalAccess).toHaveBeenCalledTimes(2))
-    expect(serviceMock.patchExternalAccess).toHaveBeenLastCalledWith(
-      {
-        body: {
-          agent_enabled: true,
-          mcp_enabled: true,
-          service_api_enabled: true,
-          workflow_enabled: true,
-        },
-        params: { control_space_id: 'space-1' },
-      },
-      expect.anything(),
+    await waitFor(() =>
+      expect(toastMock.error).toHaveBeenCalledWith('dataset.newKnowledge.settings.saveFailed'),
     )
-    await waitFor(() => expect(apiAccessSwitch).toHaveAttribute('aria-checked', 'true'))
+    expect(apiAccessSwitch).toHaveAttribute('aria-checked', 'true')
+    expect(screen.queryByText('dataset.newKnowledge.settings.saveFailed')).not.toBeInTheDocument()
   })
 
   it('requires the exact knowledge name before deletion', async () => {
@@ -837,7 +883,7 @@ describe('KnowledgeSettingsForm', () => {
     expect(routerMock.replace).toHaveBeenCalledWith('/datasets?view=new')
   })
 
-  it('keeps edits and offers retry after saving fails', async () => {
+  it('keeps edits and shows a standard error toast after saving fails', async () => {
     const user = userEvent.setup()
     serviceMock.patchSpace.mockRejectedValueOnce(new Error('network error'))
     renderForm()
@@ -845,20 +891,24 @@ describe('KnowledgeSettingsForm', () => {
     const nameInput = screen.getByRole('textbox', { name: 'datasetSettings.form.name' })
     await user.clear(nameInput)
     await user.type(nameInput, 'Camera specs draft')
-    await user.click(
-      screen.getByRole('button', {
-        name: 'dataset.newKnowledge.settings.saveChanges',
-      }),
+    const saveButton = screen.getByRole('button', {
+      name: 'dataset.newKnowledge.settings.saveChanges',
+    })
+    await user.click(saveButton)
+
+    await waitFor(() =>
+      expect(toastMock.error).toHaveBeenCalledWith('dataset.newKnowledge.settings.saveFailed'),
     )
-
-    expect(await screen.findByText('dataset.newKnowledge.settings.saveFailed')).toBeInTheDocument()
     expect(nameInput).toHaveValue('Camera specs draft')
+    expect(screen.queryByText('dataset.newKnowledge.settings.saveFailed')).not.toBeInTheDocument()
+    expect(saveButton).toBeEnabled()
 
-    await user.click(screen.getByRole('button', { name: 'common.operation.retry' }))
+    await user.click(saveButton)
     await waitFor(() => expect(serviceMock.patchSpace).toHaveBeenCalledTimes(2))
+    expect(toastMock.success).toHaveBeenCalledWith('common.api.actionSuccess')
   })
 
-  it('retries an immediate retrieval settings update without submitting basic info', async () => {
+  it('shows an error toast for a failed retrieval settings update without submitting basic info', async () => {
     const user = userEvent.setup()
     serviceMock.patchSettings.mockRejectedValueOnce(new Error('settings unavailable'))
     renderForm()
@@ -869,10 +919,10 @@ describe('KnowledgeSettingsForm', () => {
       }),
     )
 
-    expect(await screen.findByText('dataset.newKnowledge.settings.saveFailed')).toBeInTheDocument()
-    await user.click(screen.getByRole('button', { name: 'common.operation.retry' }))
-
-    await waitFor(() => expect(serviceMock.patchSettings).toHaveBeenCalledTimes(2))
+    await waitFor(() =>
+      expect(toastMock.error).toHaveBeenCalledWith('dataset.newKnowledge.settings.saveFailed'),
+    )
+    expect(screen.queryByText('dataset.newKnowledge.settings.saveFailed')).not.toBeInTheDocument()
     expect(serviceMock.patchSpace).not.toHaveBeenCalled()
   })
 
@@ -1109,25 +1159,11 @@ describe('KnowledgeSettingsForm', () => {
     await user.type(thresholdInput, '0.72')
     await user.tab()
 
-    expect(await screen.findByText('dataset.newKnowledge.permissionRestricted')).toBeInTheDocument()
-    expect(screen.queryByText('dataset.newKnowledge.settings.saveFailed')).not.toBeInTheDocument()
-    expect(thresholdInput).toHaveValue('0.72')
-
-    await user.click(screen.getByRole('button', { name: 'common.operation.retry' }))
-
-    await waitFor(() => expect(serviceMock.patchSettings).toHaveBeenCalledTimes(2))
-    expect(serviceMock.patchSettings).toHaveBeenLastCalledWith(
-      {
-        body: {
-          expectedRevision: 5,
-          retrieval: expect.objectContaining({
-            scoreThreshold: expect.objectContaining({ value: 0.72 }),
-          }),
-        },
-        params: { control_space_id: 'space-1' },
-      },
-      expect.anything(),
+    await waitFor(() =>
+      expect(toastMock.error).toHaveBeenCalledWith('dataset.newKnowledge.permissionRestricted'),
     )
+    expect(screen.queryByText('dataset.newKnowledge.permissionRestricted')).not.toBeInTheDocument()
+    expect(thresholdInput).toHaveValue('0.72')
   })
 
   it('requires a rerank model for a legacy knowledge base and saves it as enabled', async () => {
@@ -1416,7 +1452,7 @@ describe('KnowledgeSettingsForm', () => {
           name: 'dataset.newKnowledge.settings.systemReasoningModelLabel',
         }),
       )
-      expect(await screen.findByRole('status')).toHaveTextContent('common.operation.saving')
+      expect(screen.queryByText('common.operation.saving')).not.toBeInTheDocument()
 
       fireEvent.change(
         screen.getByRole('textbox', {
@@ -1450,6 +1486,9 @@ describe('KnowledgeSettingsForm', () => {
         },
         expect.anything(),
       )
+      await waitFor(() =>
+        expect(toastMock.success).toHaveBeenCalledWith('common.api.actionSuccess'),
+      )
     } finally {
       vi.useRealTimers()
     }
@@ -1558,10 +1597,10 @@ describe('KnowledgeSettingsForm', () => {
     )
     expect(
       screen.getByRole('switch', { name: 'dataset.newKnowledge.apiAgentAccess' }),
-    ).toHaveAttribute('aria-disabled', 'true')
+    ).not.toHaveAttribute('aria-disabled', 'true')
     expect(
       screen.getByRole('switch', { name: 'dataset.newKnowledge.workflowAccess' }),
-    ).toHaveAttribute('aria-disabled', 'true')
+    ).not.toHaveAttribute('aria-disabled', 'true')
 
     await user.click(
       screen.getByRole('button', {
@@ -1817,7 +1856,7 @@ describe('KnowledgeSettingsForm', () => {
       }),
     )
 
-    expect(await screen.findByRole('status')).toHaveTextContent('common.operation.saving')
+    expect(screen.queryByText('common.operation.saving')).not.toBeInTheDocument()
     expect(toastMock.success).not.toHaveBeenCalled()
 
     resolveMigration({
@@ -1831,11 +1870,11 @@ describe('KnowledgeSettingsForm', () => {
       updated_at: '2026-07-28T00:01:00Z',
     })
 
-    await waitFor(() => expect(screen.queryByRole('status')).not.toBeInTheDocument())
-    expect(toastMock.success).not.toHaveBeenCalled()
+    await waitFor(() => expect(toastMock.success).toHaveBeenCalledWith('common.api.actionSuccess'))
+    expect(screen.queryByText('common.operation.saving')).not.toBeInTheDocument()
   })
 
-  it('offers retry when a durable profile migration fails', async () => {
+  it('shows an error toast when a durable profile migration fails', async () => {
     const user = userEvent.setup()
     serviceMock.patchSettings.mockResolvedValueOnce({
       migration: {
@@ -1869,11 +1908,11 @@ describe('KnowledgeSettingsForm', () => {
       }),
     )
 
-    expect(await screen.findByText('dataset.newKnowledge.settings.saveFailed')).toBeInTheDocument()
+    await waitFor(() =>
+      expect(toastMock.error).toHaveBeenCalledWith('dataset.newKnowledge.settings.saveFailed'),
+    )
+    expect(screen.queryByText('dataset.newKnowledge.settings.saveFailed')).not.toBeInTheDocument()
     expect(toastMock.success).not.toHaveBeenCalled()
-    await user.click(screen.getByRole('button', { name: 'common.operation.retry' }))
-
-    await waitFor(() => expect(serviceMock.patchSettings).toHaveBeenCalledTimes(2))
   })
 
   it('fully locks the page for a view-only user', () => {
diff --git a/web/features/new-rag/components/knowledge-space-card.tsx b/web/features/new-rag/components/knowledge-space-card.tsx
index 3d259dd2f84..b76abb97398 100644
--- a/web/features/new-rag/components/knowledge-space-card.tsx
+++ b/web/features/new-rag/components/knowledge-space-card.tsx
@@ -69,7 +69,7 @@ export function KnowledgeSpaceCard({
             </div>
           </div>
         </div>
-        <p className="relative z-1 line-clamp-2 min-h-8 w-full px-4 py-0.5 body-xs-regular text-text-tertiary">
+        <p className="relative z-1 line-clamp-2 min-h-8 w-full px-4 py-0.5 body-xs-regular wrap-break-word text-text-tertiary">
           {summary?.description || t(($) => $['newKnowledge.noDescription'])}
         </p>
       </Link>
diff --git a/web/features/new-rag/document-chunk-tree.tsx b/web/features/new-rag/document-chunk-tree.tsx
index 111e16c868c..8282de55983 100644
--- a/web/features/new-rag/document-chunk-tree.tsx
+++ b/web/features/new-rag/document-chunk-tree.tsx
@@ -11,6 +11,8 @@ import { chunkTreeLabel, visibleDocumentChunkNodes } from './document-detail-mod
 
 const VIRTUALIZATION_THRESHOLD = 80
 const TREE_ROW_SIZE = 30
+const TREE_ROW_INLINE_PADDING = 8
+const TREE_DEPTH_INDENT = 16
 
 function AutomaticChunkPageLoader({
   fetchNextPage,
@@ -204,7 +206,10 @@ export function DocumentChunkTreePanel({
             'bg-state-base-hover ring-1 ring-state-accent-solid ring-inset',
         )}
         role="treeitem"
-        style={style}
+        style={{
+          ...style,
+          paddingInlineStart: TREE_ROW_INLINE_PADDING + depth * TREE_DEPTH_INDENT,
+        }}
         tabIndex={-1}
         onClick={() => {
           setFocusedNodeId(node.id)
diff --git a/web/features/new-rag/document-detail-page.tsx b/web/features/new-rag/document-detail-page.tsx
index 62fd56ae915..aa7a31cc179 100644
--- a/web/features/new-rag/document-detail-page.tsx
+++ b/web/features/new-rag/document-detail-page.tsx
@@ -323,7 +323,7 @@ export function DocumentDetailPage({
 
   const document = documentQuery.data
   return (
-    <section className="flex min-h-0 flex-1 flex-col px-6 pt-3 pb-5 xl:px-8">
+    <section className="flex min-h-0 flex-1 flex-col px-6 pt-3 pb-5">
       <KnowledgeModelReadinessBanner
         capability="index"
         className="mb-4"
diff --git a/web/features/new-rag/documents-page.tsx b/web/features/new-rag/documents-page.tsx
index 5950bacbb26..208e3cc32df 100644
--- a/web/features/new-rag/documents-page.tsx
+++ b/web/features/new-rag/documents-page.tsx
@@ -2568,8 +2568,8 @@ export function DocumentsPage({ knowledgeSpaceId }: { knowledgeSpaceId: string }
       <section
         ref={documentsSectionRef}
         className={cn(
-          'relative flex min-h-full w-full flex-col gap-4 p-4 @min-[768px]/knowledge-content:p-6 @min-[1280px]/knowledge-content:p-8',
-          bulkActionsVisible && 'pb-[calc(7rem+env(safe-area-inset-bottom,0px))]',
+          'relative flex min-h-full w-full flex-col gap-4 px-6 pt-3',
+          bulkActionsVisible ? 'pb-[calc(7rem+env(safe-area-inset-bottom,0px))]' : 'pb-6',
         )}
         onDragEnter={(event) => {
           const types = Array.from(event.dataTransfer.types ?? [])
diff --git a/web/features/new-rag/knowledge-settings-form.tsx b/web/features/new-rag/knowledge-settings-form.tsx
index 9631d0881fb..e31650de97c 100644
--- a/web/features/new-rag/knowledge-settings-form.tsx
+++ b/web/features/new-rag/knowledge-settings-form.tsx
@@ -71,11 +71,6 @@ const RERANK_MODEL_LABEL_ID = 'knowledge-rerank-model-label'
 const RERANK_MODEL_ERROR_ID = 'knowledge-rerank-model-error'
 
 type BasicSaveSlice = 'members' | 'space'
-type SaveErrorSlice = 'basic' | 'externalAccess' | 'settings'
-type SaveError = {
-  kind: 'generic' | 'permission'
-  slice: SaveErrorSlice
-}
 
 type ExternalAccessDraft = {
   apiEnabled: boolean
@@ -298,7 +293,6 @@ export function KnowledgeSettingsForm({
     }),
   )
   const [nameTouched, setNameTouched] = useState(false)
-  const [saveError, setSaveError] = useState<SaveError>()
   const [isBasicRefreshing, setIsBasicRefreshing] = useState(false)
   const [pendingMigrationId, setPendingMigrationId] = useState<string>()
   const [pendingEmbeddingModel, setPendingEmbeddingModel] = useState<DefaultModel>()
@@ -366,7 +360,6 @@ export function KnowledgeSettingsForm({
   const canManageAccess = space.permission_keys.includes('knowledge_space_access_config')
   const canDelete = space.permission_keys.includes('knowledge_space_delete')
   const initialModelSetup = !settings.active_profile_available
-  const modelSetupReady = settings.active_profile_available
   const readinessFieldLabel = (field: KnowledgeFsSettingsResponse['issues'][number]['field']) => {
     if (field === 'embedding') return tSettings(($) => $['form.embeddingModel'])
     if (field === 'reasoning') return tCommon(($) => $['modelProvider.systemReasoningModel.key'])
@@ -451,15 +444,23 @@ export function KnowledgeSettingsForm({
     settingsMutation.isPending ||
     Boolean(pendingMigrationId)
   const basicFieldsDisabled = !canEdit || isBasicSaving
-  const externalAccessDisabled = !canEdit || !canManageAccess || !modelSetupReady
+  const externalAccessDisabled = !canEdit || !canManageAccess
   const retrievalFieldsDisabled = !canEdit || (!initialModelSetup && embeddingDirty)
   const saveDisabled =
-    !basicDirty ||
-    nameInvalid ||
-    descriptionInvalid ||
-    membersInvalid ||
-    isBasicSaving ||
-    serverConflict
+    !basicDirty || nameInvalid || descriptionInvalid || membersInvalid || serverConflict
+  const showSaveSuccess = useCallback(
+    () => toast.success(tCommon(($) => $['api.actionSuccess'])),
+    [tCommon],
+  )
+  const showSaveError = useCallback(
+    (error?: unknown) =>
+      toast.error(
+        error instanceof Response && error.status === 403
+          ? t(($) => $['newKnowledge.permissionRestricted'])
+          : t(($) => $['newKnowledge.settings.saveFailed']),
+      ),
+    [t],
+  )
   const startDraft = () => onDraftStart?.()
   const beginSettingsDraft = (patch: Partial<SettingsDraft>) => {
     if (!basicDirtyRef.current) settingsDraftOwnsFormLockRef.current = true
@@ -477,7 +478,6 @@ export function KnowledgeSettingsForm({
     setVisibility(space.visibility)
     setSelectedMemberIds(initialSelectedMemberIds)
     setNameTouched(false)
-    if (saveError?.slice === 'basic') setSaveError(undefined)
     onDraftFinish?.()
   }
 
@@ -524,12 +524,14 @@ export function KnowledgeSettingsForm({
         setRetrievalBaseline(savedRetrievalFingerprint)
       }
       void invalidateSettingsQueries().then(() => {
+        const hasQueuedSettingsDraft = Boolean(queuedSettingsDraftRef.current)
         migratingSettingsDraftRef.current = undefined
-        if (!queuedSettingsDraftRef.current) pendingSettingsDraftRef.current = undefined
-        resumeSettingsQueueAfterMigrationRef.current = Boolean(queuedSettingsDraftRef.current)
+        if (!hasQueuedSettingsDraft) pendingSettingsDraftRef.current = undefined
+        resumeSettingsQueueAfterMigrationRef.current = hasQueuedSettingsDraft
         setPendingMigrationId(undefined)
+        if (!hasQueuedSettingsDraft) showSaveSuccess()
         if (
-          !queuedSettingsDraftRef.current &&
+          !hasQueuedSettingsDraft &&
           settingsDraftOwnsFormLockRef.current &&
           !basicDirtyRef.current
         ) {
@@ -550,8 +552,7 @@ export function KnowledgeSettingsForm({
       resumeSettingsQueueAfterMigrationRef.current = false
       // oxlint-disable-next-line eslint-react/set-state-in-effect -- A terminal remote migration retires the local polling guard.
       setPendingMigrationId(undefined)
-      // oxlint-disable-next-line eslint-react/set-state-in-effect -- The authoritative failed migration transitions the save UI to its retry state.
-      setSaveError({ kind: 'generic', slice: 'settings' })
+      showSaveError()
     }
   }, [
     invalidateSettingsQueries,
@@ -559,12 +560,12 @@ export function KnowledgeSettingsForm({
     migrationQuery.isError,
     onDraftFinish,
     pendingMigrationId,
+    showSaveError,
+    showSaveSuccess,
   ])
 
   const performBasicSave = async () => {
-    if (saveDisabled || !canEdit) return
-
-    setSaveError(undefined)
+    if (saveDisabled || isBasicSaving || !canEdit) return
 
     try {
       const saveSlice = async (
@@ -612,14 +613,15 @@ export function KnowledgeSettingsForm({
         )
       }
       completedBasicSaveFingerprintsRef.current = {}
+      showSaveSuccess()
       setIsBasicRefreshing(true)
       onDraftFinish?.()
       void invalidateSettingsQueries().then(
         () => setIsBasicRefreshing(false),
         () => setIsBasicRefreshing(false),
       )
-    } catch {
-      setSaveError({ kind: 'generic', slice: 'basic' })
+    } catch (error) {
+      showSaveError(error)
     }
   }
 
@@ -635,7 +637,6 @@ export function KnowledgeSettingsForm({
     let nextDraft: ExternalAccessDraft | undefined = draft
     while (nextDraft) {
       queuedExternalAccessDraftRef.current = undefined
-      setSaveError(undefined)
       try {
         await externalAccessMutation.mutateAsync({
           body: {
@@ -648,12 +649,10 @@ export function KnowledgeSettingsForm({
         })
         externalAccessBaselineRef.current = nextDraft
         nextDraft = queuedExternalAccessDraftRef.current
-      } catch {
+      } catch (error) {
         queuedExternalAccessDraftRef.current = undefined
         externalAccessSaveInFlightRef.current = false
-        setApiEnabled(externalAccessBaselineRef.current.apiEnabled)
-        setWorkflowEnabled(externalAccessBaselineRef.current.workflowEnabled)
-        setSaveError({ kind: 'generic', slice: 'externalAccess' })
+        showSaveError(error)
         return
       }
     }
@@ -661,6 +660,7 @@ export function KnowledgeSettingsForm({
     externalAccessSaveInFlightRef.current = false
     setApiEnabled(externalAccessBaselineRef.current.apiEnabled)
     setWorkflowEnabled(externalAccessBaselineRef.current.workflowEnabled)
+    showSaveSuccess()
     await invalidateSettingsQueries()
   }
 
@@ -705,7 +705,6 @@ export function KnowledgeSettingsForm({
       }
     }
 
-    setSaveError(undefined)
     try {
       const result = await settingsMutation.mutateAsync({
         body,
@@ -729,10 +728,7 @@ export function KnowledgeSettingsForm({
       await invalidateSettingsQueries()
       return 'saved' as const
     } catch (error) {
-      setSaveError({
-        kind: error instanceof Response && error.status === 403 ? 'permission' : 'generic',
-        slice: 'settings',
-      })
+      showSaveError(error)
       return 'failed' as const
     }
   }
@@ -754,10 +750,12 @@ export function KnowledgeSettingsForm({
     settingsSaveInFlightRef.current = true
     let nextDraft: SettingsDraft | undefined = draft
     let saveResult: Awaited<ReturnType<typeof saveSettingsDraft>> = 'skipped'
+    let didSave = false
     try {
       while (nextDraft) {
         queuedSettingsDraftRef.current = undefined
         saveResult = await saveSettingsDraft(nextDraft)
+        if (saveResult === 'saved') didSave = true
         if (saveResult === 'failed' || saveResult === 'migration') break
         nextDraft = queuedSettingsDraftRef.current
       }
@@ -781,6 +779,7 @@ export function KnowledgeSettingsForm({
     if (!latestDraftIsSaved) return
 
     pendingSettingsDraftRef.current = undefined
+    if (didSave) showSaveSuccess()
     if (settingsDraftOwnsFormLockRef.current && !basicDirtyRef.current) {
       settingsDraftOwnsFormLockRef.current = false
       onDraftFinish?.()
@@ -815,18 +814,6 @@ export function KnowledgeSettingsForm({
     void performBasicSave()
   }
 
-  const retrySave = () => {
-    if (saveError?.slice === 'externalAccess') {
-      void performExternalAccessSave(pendingExternalAccessRef.current)
-      return
-    }
-    if (saveError?.slice === 'settings') {
-      void performSettingsSave(pendingSettingsDraftRef.current ?? liveSettingsDraftRef.current)
-      return
-    }
-    requestSave()
-  }
-
   const armHistoryGuard = useCallback(() => {
     globalThis.history.pushState(globalThis.history.state, '', globalThis.location.href)
     historyGuardArmedRef.current = true
@@ -993,23 +980,6 @@ export function KnowledgeSettingsForm({
           />
         )}
 
-      {saveError && (
-        <div
-          className="mb-3 flex items-center gap-2 rounded-lg border border-text-destructive/20 bg-background-default-subtle px-3 py-2"
-          role="alert"
-        >
-          <span aria-hidden className="i-ri-error-warning-fill size-4 text-text-destructive" />
-          <span className="min-w-0 flex-1 system-xs-regular text-text-destructive">
-            {saveError.kind === 'permission'
-              ? t(($) => $['newKnowledge.permissionRestricted'])
-              : t(($) => $['newKnowledge.settings.saveFailed'])}
-          </span>
-          <Button type="button" size="small" variant="ghost" onClick={retrySave}>
-            {tCommon(($) => $['operation.retry'])}
-          </Button>
-        </div>
-      )}
-
       {serverConflict && (
         <div
           className="mb-3 flex items-center gap-2 rounded-lg border border-text-warning/20 bg-state-warning-hover px-3 py-2"
@@ -1022,16 +992,6 @@ export function KnowledgeSettingsForm({
         </div>
       )}
 
-      {pendingMigrationId && (
-        <div
-          className="mb-3 flex items-center gap-2 rounded-lg border border-components-panel-border bg-background-section px-3 py-2 system-xs-regular text-text-tertiary"
-          role="status"
-        >
-          <span aria-hidden className="i-ri-loader-4-line size-4 shrink-0 animate-spin" />
-          {tCommon(($) => $['operation.saving'])}
-        </div>
-      )}
-
       <Form className="flex flex-col gap-4 overflow-hidden pt-2 pb-7" onSubmit={requestSave}>
         <h2 className="flex h-8 items-center system-sm-semibold text-text-secondary">
           {t(($) => $['newKnowledge.settings.basicInfo'])}
@@ -1151,9 +1111,7 @@ export function KnowledgeSettingsForm({
               {tCommon(($) => $['operation.cancel'])}
             </Button>
             <Button type="submit" variant="primary" disabled={saveDisabled} loading={isBasicSaving}>
-              {isBasicSaving
-                ? tCommon(($) => $['operation.saving'])
-                : t(($) => $['newKnowledge.settings.saveChanges'])}
+              {t(($) => $['newKnowledge.settings.saveChanges'])}
             </Button>
           </div>
         )}
@@ -1360,7 +1318,6 @@ export function KnowledgeSettingsForm({
                 <div className="flex items-center gap-3">
                   <NumberField
                     id="knowledge-top-k"
-                    name="knowledge-top-k"
                     min={TOP_K_MIN}
                     max={TOP_K_MAX}
                     step={1}
@@ -1425,7 +1382,6 @@ export function KnowledgeSettingsForm({
                 <div className="flex items-center gap-3">
                   <NumberField
                     id="knowledge-score-threshold"
-                    name="knowledge-score-threshold"
                     min={SCORE_THRESHOLD_MIN}
                     max={SCORE_THRESHOLD_MAX}
                     step={0.01}
diff --git a/web/features/new-rag/sources-page.tsx b/web/features/new-rag/sources-page.tsx
index b4c641f6356..10a9b6b771f 100644
--- a/web/features/new-rag/sources-page.tsx
+++ b/web/features/new-rag/sources-page.tsx
@@ -299,7 +299,7 @@ export function SourcesPage({ knowledgeSpaceId }: { knowledgeSpaceId: string })
   ])
 
   return (
-    <div className="flex min-h-full min-w-0 flex-1 flex-col p-4 @min-[768px]/knowledge-content:p-6 @min-[1280px]/knowledge-content:p-8">
+    <div className="flex min-h-full min-w-0 flex-1 flex-col px-6 pt-3 pb-6 sm:pb-8">
       <header className="flex items-start justify-between gap-4">
         <div>
           <h2 className="title-xl-semi-bold leading-6 text-text-primary">