feat: add signature field to AnthropicThinkingBlock

Author: caozhiyuan

src/routes/messages/anthropic-types.ts

@@ -56,6 +56,7 @@ export interface AnthropicToolUseBlock {
 export interface AnthropicThinkingBlock {
   type: "thinking"
   thinking: string
+  signature: string
 }
 
 export type AnthropicUserContentBlock =

tests/anthropic-request.test.ts

@@ -136,6 +136,7 @@ describe("Anthropic to OpenAI translation logic", () => {
             {
               type: "thinking",
               thinking: "Let me think about this simple math problem...",
+              signature: "abc123",
             },
             { type: "text", text: "2+2 equals 4." },
           ],
@@ -168,6 +169,7 @@ describe("Anthropic to OpenAI translation logic", () => {
               type: "thinking",
               thinking:
                 "I need to call the weather API to get current weather information.",
+              signature: "def456",
             },
             { type: "text", text: "I'll check the weather for you." },
             {