feat(web): workspace components — ComparePane, Memory page, McpDialog, error boundaries, message-parts

- Add ComparePane.tsx: side-by-side AI response comparison
- Add Memory.tsx: memory management page with CRUD UI
- Add McpPermissionDialog.tsx: MCP tool permission approval dialog
- Add McpResponseDisplay.tsx: MCP response visualization
- Add MessageBoundary.tsx + MessageListErrorBoundary.tsx: error resilience
- Add EmptyState.tsx: contextual empty state component
- Add KeyboardShortcutsDialog.tsx: keyboard shortcut reference
- Add message-parts/: ActionRow, CompactCard, MistakeRecoverySentinel, ReasoningBlock, SendToTerminalMenu, StatsLine, SummaryCard
- Add useDraftPersistence.ts: draft message persistence hook
- Add useTerminals.ts: terminal session management hook
- Add keyboard-shortcuts.ts + tool-utils.ts: shared utilities
- Extend components: ChatInput, MessageBubble, MessageList, Workspace, panes
- Extend hooks: useTerminalSocket, useSessionStream test suite
- Update pages: Home, Project — workspace layout and session flow

apps/web/src/components/AgentPicker.tsx

@@ -90,7 +90,7 @@ export function AgentPicker({ projectId, value, onChange }: Props) {
       <DropdownMenuTrigger asChild>
         <button
           type="button"
-          className="inline-flex items-center gap-1.5 rounded-full border border-border px-2.5 py-1 text-xs text-muted-foreground transition-colors hover:bg-muted hover:text-foreground max-md:min-h-[36px] max-md:min-w-[36px]"
+          className="inline-flex items-center gap-1.5 rounded-full border border-border px-2.5 py-1 text-xs text-muted-foreground motion-reduce:transition-none transition-colors hover:bg-muted hover:text-foreground active:scale-[0.97] max-md:min-h-[36px] max-md:min-w-[36px]"
           title={selectedAgent?.name ? `Agent: ${selectedAgent.name}` : 'No agent'}
           aria-label={`Agent: ${triggerLabel}`}
         >