fix(model-aliases): avoid collisions with existing model names

src/pages/ThinkingAliasesPage.tsx

@@ -120,6 +120,28 @@ export const defaultModelAlias = (
   return `${normalizedModel}${normalizedEffort ? `-${normalizedEffort}` : ''}${fast ? '-fast' : ''}`;
 };
 
+export const uniqueModelAlias = (
+  alias: string,
+  existingModelNames: string[],
+) => {
+  const normalizedAlias = alias.trim();
+  if (!normalizedAlias) return '';
+  const existingNames = new Set(
+    existingModelNames
+      .map((name) => name.trim().toLowerCase())
+      .filter(Boolean),
+  );
+  if (!existingNames.has(normalizedAlias.toLowerCase())) return normalizedAlias;
+
+  let suffix = 2;
+  let candidate = `${normalizedAlias}-${suffix}`;
+  while (existingNames.has(candidate.toLowerCase())) {
+    suffix += 1;
+    candidate = `${normalizedAlias}-${suffix}`;
+  }
+  return candidate;
+};
+
 export const thinkingAliasSourceKindLabel = (kind: string) => {
   if (kind === 'codex-oauth') return 'Codex OAuth';
   if (kind === 'codex-api') return 'Codex API';
@@ -295,6 +317,7 @@ export function ThinkingAliasesPage() {
 
   const normalizedEffort = effort.trim().toLowerCase();
   const defaultAlias = defaultModelAlias(selectedSource?.model, normalizedEffort, fastEnabled);
+  const uniqueDefaultAlias = uniqueModelAlias(defaultAlias, sources.map((source) => source.model));
   const customEffortSelected = Boolean(
     normalizedEffort
       && !effortOptions.some((option) => option.value === normalizedEffort),
@@ -305,10 +328,10 @@ export function ThinkingAliasesPage() {
       const currentValue = current.trim();
       const canReplace = !currentValue || currentValue === generatedAliasRef.current;
       if (!canReplace) return current;
-      generatedAliasRef.current = defaultAlias;
-      return defaultAlias;
+      generatedAliasRef.current = uniqueDefaultAlias;
+      return uniqueDefaultAlias;
     });
-  }, [defaultAlias]);
+  }, [uniqueDefaultAlias]);
 
   const createAlias = async () => {
     if (!selectedSource) {

tests/thinkingAliases.test.ts

@@ -4,6 +4,7 @@ import {
   combineModelAliasSources,
   defaultModelAlias,
   thinkingAliasSourceKindLabel,
+  uniqueModelAlias,
 } from '../src/pages/ThinkingAliasesPage';
 
 describe('模型别名默认名称', () => {
@@ -13,6 +14,16 @@ describe('模型别名默认名称', () => {
     expect(defaultModelAlias('gpt-5.6-sol', 'xhigh', true)).toBe('gpt-5.6-sol-xhigh-fast');
     expect(defaultModelAlias('gpt-5.6-sol', '', false)).toBe('');
   });
+
+  test('默认别名与现有模型重名时递增数字后缀', () => {
+    expect(uniqueModelAlias('gpt-5.6-sol-fast', ['gpt-5.6-sol-fast'])).toBe('gpt-5.6-sol-fast-2');
+    expect(uniqueModelAlias('gpt-5.6-sol-fast', [
+      'gpt-5.6-sol-fast',
+      'gpt-5.6-sol-fast-2',
+    ])).toBe('gpt-5.6-sol-fast-3');
+    expect(uniqueModelAlias('gpt-5.6-sol-fast', ['GPT-5.6-SOL-FAST'])).toBe('gpt-5.6-sol-fast-2');
+    expect(uniqueModelAlias('gpt-5.6-sol-fast', ['gpt-5.6-sol'])).toBe('gpt-5.6-sol-fast');
+  });
 });
 
 describe('思考别名', () => {