feat(frontend): add detail level dropdown and summary toggle to export controls

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

frontend/src/pages/SessionDetailPage.tsx

@@ -32,6 +32,8 @@ export function SessionDetailPage() {
   const [librarySteps, setLibrarySteps] = useState<Step[]>([])
   const [copiedStepIndex, setCopiedStepIndex] = useState<number | null>(null)
   const [maxStepIndex, setMaxStepIndex] = useState<number | null>(null)
+  const [detailLevel, setDetailLevel] = useState<'standard' | 'full'>('standard')
+  const [includeSummary, setIncludeSummary] = useState(false)
 
   useEffect(() => {
     if (id) {
@@ -96,6 +98,8 @@ export function SessionDetailPage() {
       include_timestamps: true,
       include_tree_info: true,
       ...(maxStepIndex !== null && { max_step_index: maxStepIndex }),
+      detail_level: detailLevel,
+      include_summary: includeSummary,
     }
     return await sessionsApi.export(session.id, options)
   }
@@ -142,6 +146,8 @@ export function SessionDetailPage() {
         include_timestamps: true,
         include_tree_info: true,
         ...(maxStepIndex !== null && { max_step_index: maxStepIndex }),
+        detail_level: detailLevel,
+        include_summary: includeSummary,
       }
       const content = await sessionsApi.export(session.id, options)
       if (content) {
@@ -156,9 +162,9 @@ export function SessionDetailPage() {
     }
   }
 
-  const handleDownload = () => {
-    if (!exportContent || !session) return
-    const blob = new Blob([exportContent], { type: 'text/plain' })
+  const handleDownload = (content: string) => {
+    if (!session) return
+    const blob = new Blob([content], { type: 'text/plain' })
     const url = URL.createObjectURL(blob)
     const a = document.createElement('a')
     a.href = url
@@ -169,6 +175,30 @@ export function SessionDetailPage() {
     URL.revokeObjectURL(url)
   }
 
+  const handleToggleSummary = async (include: boolean) => {
+    setIncludeSummary(include)
+    if (!session) return
+    const options: SessionExport = {
+      format: exportFormat,
+      include_timestamps: true,
+      include_tree_info: true,
+      ...(maxStepIndex !== null && { max_step_index: maxStepIndex }),
+      detail_level: detailLevel,
+      include_summary: include,
+    }
+    try {
+      const content = await sessionsApi.export(session.id, options)
+      if (content) {
+        setExportContent(content)
+        toast.success(include ? 'Summary added' : 'Summary removed')
+      }
+    } catch (err) {
+      console.error('Failed to re-fetch export:', err)
+      toast.error('Failed to update export')
+      setIncludeSummary(!include)
+    }
+  }
+
   const handleSaveAsTree = async (data: SaveAsTreeRequest) => {
     if (!session) return
     setIsSavingTree(true)
@@ -406,6 +436,18 @@ export function SessionDetailPage() {
                   ))}
                 </select>
               )}
+              <select
+                value={detailLevel}
+                onChange={(e) => setDetailLevel(e.target.value as 'standard' | 'full')}
+                aria-label="Detail level"
+                className={cn(
+                  'rounded-md border border-white/10 bg-black/50 px-3 py-2 text-sm text-white',
+                  'focus:border-white/30 focus:outline-none focus:ring-1 focus:ring-white/20'
+                )}
+              >
+                <option value="standard">Standard</option>
+                <option value="full">Full Detail</option>
+              </select>
               <button
                 onClick={handleCopy}
                 disabled={isExporting}
@@ -520,6 +562,8 @@ export function SessionDetailPage() {
         filename={getFilename()}
         format={exportFormat}
         onDownload={handleDownload}
+        includeSummary={includeSummary}
+        onToggleSummary={handleToggleSummary}
       />
 
       {/* Save as Tree Modal */}