diff --git a/apps/desktop/src/renderer/src/components/Thinking.tsx b/apps/desktop/src/renderer/src/components/Thinking.tsx
index d1e8f86..d52e03d 100644
--- a/apps/desktop/src/renderer/src/components/Thinking.tsx
+++ b/apps/desktop/src/renderer/src/components/Thinking.tsx
@@ -114,7 +114,7 @@ export function Thinking({
           <div
             ref={scrollRef}
             onScroll={handleScroll}
-            className={`mt-1 ml-[5px] pl-4 ${streaming ? 'max-h-[220px] overflow-y-auto' : ''}`}
+            className={`mt-1 ml-[5px] overflow-y-auto pl-4 ${streaming ? 'max-h-[220px]' : 'max-h-[400px]'}`}
           >
             <div className="relative">
               <span aria-hidden className="absolute bottom-0 left-[3px] top-0 w-px bg-line" />
@@ -143,11 +143,11 @@ export function Thinking({
   )
 }
 
-/** 思考文本 → 行数组（空行剔除，超长行截断） */
+/** 思考文本 → 行数组（空行剔除，内容不截断；过长由容器的滚动条承担） */
 export function thinkingRows(text: string): { primary: string }[] {
   return text
     .split('\n')
     .map((l) => l.trim())
     .filter(Boolean)
-    .map((line) => ({ primary: line.length > 300 ? `${line.slice(0, 300)}…` : line }))
+    .map((line) => ({ primary: line }))
 }
diff --git a/apps/desktop/src/renderer/src/components/ToolChips.tsx b/apps/desktop/src/renderer/src/components/ToolChips.tsx
index e7a1b3d..2972d3a 100644
--- a/apps/desktop/src/renderer/src/components/ToolChips.tsx
+++ b/apps/desktop/src/renderer/src/components/ToolChips.tsx
@@ -198,9 +198,13 @@ function buildRow(view: ToolCallView, dupIndex: number): ToolRow {
     )
     const resultText = extractResultText(tool.result)
     if (resultText) {
-      const lines = resultText.split('\n').slice(0, 10)
-      for (const line of lines) detail.push({ text: line.slice(0, 160), tone: 'plain' })
-      if (resultText.split('\n').length > 10) detail.push({ text: '…（结果已截断）', tone: 'plain' })
+      // 完整输出，不逐行截断；过长由展开区的滚动条承担，仅在行数超限时兜底
+      const lines = resultText.split('\n')
+      const maxLines = 400
+      for (const line of lines.slice(0, maxLines)) detail.push({ text: line, tone: 'plain' })
+      if (lines.length > maxLines) {
+        detail.push({ text: `…（共 ${lines.length} 行，已截断）`, tone: 'plain' })
+      }
     }
   }
   const args = tool?.args ?? view.pendingApproval?.args
@@ -237,7 +241,7 @@ function buildThinkingRows(texts: string[]): ToolRow[] {
       file: '',
       dir: '',
       chip: lines[0].length > 60 ? `${lines[0].slice(0, 60)}…` : lines[0],
-      detail: lines.slice(0, 12).map((line) => ({ text: line.slice(0, 160), tone: 'plain' as const })),
+      detail: lines.map((line) => ({ text: line, tone: 'plain' as const })),
       tool: undefined,
       pending: false
     })
@@ -336,22 +340,24 @@ export function ToolChips({ calls = [], thinking = [], className = '' }: {
               {row.icon !== 'think' && <StatusMark tool={row.tool} pending={row.pending} />}
             </button>
 
-            {/* 展开明细 */}
+            {/* 展开明细：完整内容不截断，过长时在滚动区里查看；收起时懒渲染不占 DOM */}
             <div
               className="grid transition-[grid-template-rows,opacity]"
               style={{ gridTemplateRows: rowOpen ? '1fr' : '0fr', opacity: rowOpen ? 1 : 0, transitionTimingFunction: 'ease' }}
             >
               <div className="min-h-0 overflow-hidden">
-                <div className="mt-0.5 mb-1 ml-2 flex flex-col gap-0.5 border-l border-line py-0.5 pl-3.5">
-                  {row.detail.map((line, lineIndex) => (
-                    <span
-                      key={`${lineIndex}-${line.text.slice(0, 12)}`}
-                      className={`truncate text-[11.5px] leading-[1.6] ${row.icon === 'think' ? '' : 'font-mono'} ${DETONE_CLASS[line.tone ?? 'plain']}`}
-                    >
-                      {line.text}
-                    </span>
-                  ))}
-                </div>
+                {rowOpen && (
+                  <div className="mt-0.5 mb-1 ml-2 flex max-h-[320px] flex-col gap-0.5 overflow-y-auto border-l border-line py-0.5 pl-3.5">
+                    {row.detail.map((line, lineIndex) => (
+                      <span
+                        key={`${lineIndex}-${line.text.slice(0, 12)}`}
+                        className={`whitespace-pre-wrap break-words text-[11.5px] leading-[1.6] ${row.icon === 'think' ? '' : 'font-mono'} ${DETONE_CLASS[line.tone ?? 'plain']}`}
+                      >
+                        {line.text}
+                      </span>
+                    ))}
+                  </div>
+                )}
               </div>
             </div>
           </div>