Reviews: T23e passes; T24 splits into six in PRD order

tasks/ch21-30.md

@@ -162,30 +162,45 @@
 - [x] FollowUpSuggestions
 - [x] CapabilityCards
 
-## T24 Agent — `src/agent`
+## T24a Agent · Tool calls — `src/agent`
 
 - [ ] ToolCallCard
 - [ ] ToolCallGroup
 - [ ] ToolApprovalDialog
 - [ ] PermissionPrompt
+
+## T24b Agent · Progress
+
 - [ ] AgentStepList / TaskTimeline
 - [ ] AgentPlan / TodoList
 - [ ] AgentStatus
 - [ ] AgentProgress
 - [ ] SubAgentTree
+
+## T24c Agent · Changes
+
 - [ ] FileChangeCard
 - [ ] MultiFileDiff Review
 - [ ] CommandExecutionCard
+
+## T24d Agent · Previews
+
 - [ ] BrowserPreview / ScreenshotStream — host frames
 - [ ] ComputerUseViewer — host frames
 - [ ] ArtifactPanel
 - [ ] ArtifactVersionSwitcher
 - [ ] LivePreview — host content
+
+## T24e Agent · Environment
+
 - [ ] SandboxStatus
 - [ ] MCPServerList / ConnectorList
 - [ ] ToolRegistry Panel
 - [ ] MemoryPanel
 - [ ] CheckpointList / Rewind
+
+## T24f Agent · Control and cost
+
 - [ ] InterruptButton
 - [ ] HumanInputRequest
 - [ ] TokenUsageChart