fix: preserve complete remote tool details

Managed SSH Runtime events could complete successfully and then fail local conversation persistence when tool details exceeded a second, smaller renderer-to-Main schema limit. Conversation persistence now stores the complete tool details already accepted from the Runtime, so long remote results no longer leave the final assistant message stuck in a streaming state.

Release note: 修复远程项目工具结果较长时会话持久化失败的问题；Runtime 已返回的工具详情现在会完整保存到本地会话。

src/main/assistant/assistant-database.test.ts

@@ -3299,6 +3299,15 @@ describe('AssistantDatabase', () => {
             createdAt: 1_775_000_000_001,
             state: 'complete' as const,
             status: '已完成',
+            tools: [
+              {
+                callId: 'remote-tool-call',
+                name: '远程工具',
+                state: 'completed' as const,
+                summary: '完整远程工具结果',
+                output: '远程输出'.repeat(10_000)
+              }
+            ],
             contextCompressions: [
               {
                 state: 'completed' as const,
@@ -3350,6 +3359,15 @@ describe('AssistantDatabase', () => {
           content: '生成完成',
           state: 'complete',
           status: '已完成',
+          tools: [
+            {
+              callId: 'remote-tool-call',
+              name: '远程工具',
+              state: 'completed',
+              summary: '完整远程工具结果',
+              output: '远程输出'.repeat(10_000)
+            }
+          ],
           contextCompressions: [
             {
               state: 'completed',

src/main/ipc.test.ts

@@ -3917,7 +3917,16 @@ describe('registerIpcHandlers local conversation persistence', () => {
             role: 'assistant' as const,
             content: '增量内容',
             createdAt: 1,
-            state: 'streaming' as const
+            state: 'streaming' as const,
+            tools: [
+              {
+                callId: 'remote-tool-call',
+                name: '远程工具',
+                state: 'completed' as const,
+                summary: '完整远程工具结果',
+                output: '远程输出'.repeat(10_000)
+              }
+            ]
           }
         ]
       }