fix(routing): preserve allowlist edits and save state

frontend/src/features/routing/__tests__/routingPolicy.spec.ts

@@ -99,7 +99,7 @@ describe('routingPolicy', () => {
       allowed_models: ['legacy-model'],
     })
 
-    expect(parseAllowedModelsInput(' gpt-5, claude-*\nlegacy-model, gpt-5 ')).toEqual([
+    expect(parseAllowedModelsInput(' gpt-5\nclaude-*\nlegacy-model\ngpt-5 ')).toEqual([
       'gpt-5',
       'claude-*',
       'legacy-model',
@@ -107,10 +107,10 @@ describe('routingPolicy', () => {
 
     const restricted = updateAllowedModelsFromInput(
       config,
-      'gpt-5, claude-*\nlegacy-model, gpt-5',
+      'gpt-5\nclaude-*\nlegacy-model\ngpt-5',
     )
     expect(restricted.allowed_models).toEqual(['gpt-5', 'claude-*', 'legacy-model'])
-    expect(formatAllowedModelsInput(restricted.allowed_models)).toBe('gpt-5, claude-*, legacy-model')
+    expect(formatAllowedModelsInput(restricted.allowed_models)).toBe('gpt-5\nclaude-*\nlegacy-model')
     expect(routingModelScopeLabel(restricted)).toBe('3 个模型')
 
     const unrestricted = clearAllowedModels(restricted)
@@ -118,6 +118,23 @@ describe('routingPolicy', () => {
     expect(routingModelScopeLabel(unrestricted)).toBe('全部模型')
   })
 
+  it('round-trips selectors containing commas and labels wildcard scope as unrestricted', () => {
+    const selectors = ['vendor,model', 'gpt-*']
+    expect(parseAllowedModelsInput(formatAllowedModelsInput(selectors))).toEqual(selectors)
+
+    const wildcard = normalizeRoutingGroupConfig({ allowed_models: ['gpt-*', '*'] })
+    expect(routingModelScopeLabel(wildcard)).toBe('全部模型')
+  })
+
+  it('preserves historical empty selectors until unrestricted scope is explicit', () => {
+    const legacy = normalizeRoutingGroupConfig({ allowed_models: ['', '  '] })
+
+    expect(updateAllowedModelsFromInput(legacy, '  \n')).toMatchObject({
+      allowed_models: ['', '  '],
+    })
+    expect(clearAllowedModels(legacy).allowed_models).toEqual([])
+  })
+
   it('preserves an explicit model allowlist across per-model editing actions', () => {
     const allowlist = ['gpt-*', 'legacy-model']
     let config = normalizeRoutingGroupConfig({

frontend/src/features/routing/utils/routingPolicy.ts

@@ -114,7 +114,7 @@ export function normalizeRoutingGroupConfig(value: Partial<RoutingGroupConfig> |
 export function parseAllowedModelsInput(value: string): string[] {
   const seen = new Set<string>()
   return value
-    .split(/[,\r\n]+/u)
+    .split(/\r\n?|\n/u)
     .map(item => item.trim())
     .filter(Boolean)
     .filter((model) => {
@@ -125,7 +125,7 @@ export function parseAllowedModelsInput(value: string): string[] {
 }
 
 export function formatAllowedModelsInput(models: string[]): string {
-  return models.join(', ')
+  return models.join('\n')
 }
 
 export function updateAllowedModelsFromInput(
@@ -133,6 +133,14 @@ export function updateAllowedModelsFromInput(
   value: string,
 ): RoutingGroupConfig {
   const next = normalizeRoutingGroupConfig(config)
+  // Preserve the historical "empty selector" form until the user explicitly
+  // chooses the unrestricted scope. It is distinct from an empty allowlist in
+  // the routing core, where it matches no normal model.
+  const hasHistoricalEmptySelector = next.allowed_models.length > 0
+    && next.allowed_models.every(model => model.trim() === '')
+  if (value.trim() === '' && hasHistoricalEmptySelector) {
+    return next
+  }
   next.allowed_models = parseAllowedModelsInput(value)
   return next
 }
@@ -144,8 +152,11 @@ export function clearAllowedModels(config: RoutingGroupConfig): RoutingGroupConf
 }
 
 export function routingModelScopeLabel(config: RoutingGroupConfig): string {
-  const count = normalizeRoutingGroupConfig(config).allowed_models.length
-  return count ? `${count} 个模型` : '全部模型'
+  const models = normalizeRoutingGroupConfig(config).allowed_models
+  if (models.length === 0 || models.some(model => model.trim() === '*')) {
+    return '全部模型'
+  }
+  return `${models.length} 个模型`
 }
 
 export function allowedModelsMirrorPerModelPolicies(config: RoutingGroupConfig): boolean {