fix: resolve 7 bugs — idle output, permission scroll, file selector, drag area, input reset, markdown tables, panel collapse

- ChatView: consume unconsumed stream snapshots on mount so output
  appears after idle without needing a conversation switch
- PermissionPrompt: extract permission UI from StreamingMessage into a
  fixed-position component at the bottom of ChatView, preventing
  permission popups from scrolling off-screen during long responses
- StreamingMessage/MessageList: remove ~409 lines of permission UI code
  now handled by PermissionPrompt
- AssistantWorkspaceSection: fix macOS Electron file selector by using
  the correct IPC API (window.electronAPI.dialog.openFolder)
- AppShell: increase title bar drag region from h-5 to h-10 (op7418#152)
- ChatView: add key={sessionId} on MessageInput to reset input state
  when switching conversations (op7418#176)
- UpdateDialog: add remark-gfm plugin and table component mappings for
  proper GFM markdown rendering in release notes (op7418#117)
- RightPanel: add border and top margin to collapsed panel toggle for
  visibility (op7418#116)

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

Author: 7418

src/app/chat/page.tsx

@@ -5,6 +5,7 @@ import { useRouter } from 'next/navigation';
 import type { Message, SSEEvent, SessionResponse, TokenUsage, PermissionRequestEvent } from '@/types';
 import { MessageList } from '@/components/chat/MessageList';
 import { MessageInput } from '@/components/chat/MessageInput';
+import { PermissionPrompt } from '@/components/chat/PermissionPrompt';
 import { usePanel } from '@/hooks/usePanel';
 
 interface ToolUseInfo {
@@ -358,9 +359,12 @@ export default function NewChatPage() {
         toolResults={toolResults}
         streamingToolOutput={streamingToolOutput}
         statusText={statusText}
+      />
+      <PermissionPrompt
         pendingPermission={pendingPermission}
-        onPermissionResponse={handlePermissionResponse}
         permissionResolved={permissionResolved}
+        onPermissionResponse={handlePermissionResponse}
+        toolUses={toolUses}
       />
       <MessageInput
         onSend={sendFirstMessage}

src/components/chat/ChatView.tsx

@@ -7,6 +7,7 @@ import { MessageList } from './MessageList';
 import { MessageInput } from './MessageInput';
 import { usePanel } from '@/hooks/usePanel';
 import { useTranslation } from '@/hooks/useTranslation';
+import { PermissionPrompt } from './PermissionPrompt';
 import { BatchExecutionDashboard, BatchContextSync } from './batch-image-gen';
 import { setLastGeneratedImages, transferPendingToMessage } from '@/lib/image-ref-store';
 import {
@@ -117,6 +118,20 @@ export function ChatView({ sessionId, initialMessages = [], initialHasMore = fal
       if (existing.pendingPermission && !existing.permissionResolved) {
         setPendingApprovalSessionId(sessionId);
       }
+      // If stream completed while this ChatView was unmounted, consume finalMessageContent now
+      if (existing.phase !== 'active' && existing.finalMessageContent) {
+        const assistantMessage: Message = {
+          id: 'temp-assistant-' + Date.now(),
+          session_id: sessionId,
+          role: 'assistant',
+          content: existing.finalMessageContent,
+          created_at: new Date().toISOString(),
+          token_usage: existing.tokenUsage ? JSON.stringify(existing.tokenUsage) : null,
+        };
+        transferPendingToMessage(assistantMessage.id);
+        setMessages((prev) => [...prev, assistantMessage]);
+        clearSnapshot(sessionId);
+      }
     } else {
       setStreamSnapshot(null);
     }
@@ -621,19 +636,24 @@ export function ChatView({ sessionId, initialMessages = [], initialHasMore = fal
         toolResults={toolResults}
         streamingToolOutput={streamingToolOutput}
         statusText={statusText}
-        pendingPermission={pendingPermission}
-        onPermissionResponse={handlePermissionResponse}
-        permissionResolved={permissionResolved}
         onForceStop={stopStreaming}
         hasMore={hasMore}
         loadingMore={loadingMore}
         onLoadMore={loadEarlierMessages}
       />
+      {/* Permission prompt — rendered outside MessageList so it's always visible at bottom */}
+      <PermissionPrompt
+        pendingPermission={pendingPermission}
+        permissionResolved={permissionResolved}
+        onPermissionResponse={handlePermissionResponse}
+        toolUses={toolUses}
+      />
       {/* Batch image generation panels — shown above the input area */}
       <BatchExecutionDashboard />
       <BatchContextSync />
 
       <MessageInput
+        key={sessionId}
         onSend={sendMessage}
         onCommand={handleCommand}
         onStop={stopStreaming}

src/components/chat/MessageList.tsx

@@ -3,7 +3,7 @@
 import { useRef, useEffect } from 'react';
 import { useTranslation } from '@/hooks/useTranslation';
 import { useStickToBottomContext } from 'use-stick-to-bottom';
-import type { Message, PermissionRequestEvent } from '@/types';
+import type { Message } from '@/types';
 import {
   Conversation,
   ConversationContent,
@@ -61,9 +61,6 @@ interface MessageListProps {
   toolResults?: ToolResultInfo[];
   streamingToolOutput?: string;
   statusText?: string;
-  pendingPermission?: PermissionRequestEvent | null;
-  onPermissionResponse?: (decision: 'allow' | 'allow_session' | 'deny', updatedInput?: Record<string, unknown>, denyMessage?: string) => void;
-  permissionResolved?: 'allow' | 'deny' | null;
   onForceStop?: () => void;
   hasMore?: boolean;
   loadingMore?: boolean;
@@ -78,9 +75,6 @@ export function MessageList({
   toolResults = [],
   streamingToolOutput,
   statusText,
-  pendingPermission,
-  onPermissionResponse,
-  permissionResolved,
   onForceStop,
   hasMore,
   loadingMore,
@@ -152,9 +146,6 @@ export function MessageList({
             toolResults={toolResults}
             streamingToolOutput={streamingToolOutput}
             statusText={statusText}
-            pendingPermission={pendingPermission}
-            onPermissionResponse={onPermissionResponse}
-            permissionResolved={permissionResolved}
             onForceStop={onForceStop}
           />
         )}