Inline ListChangedIndicator with titles, normalize screen gaps, and rename ResultPanel to ToolResultPanel

- Place ListChangedIndicator on same line as section titles using Group with space-between in ToolControls, ResourceControls, and PromptControls
- Add ListChanged stories for ResourceControls and show indicators in ConnectedView stories
- Normalize ScreenLayout gap from "xl" to "md" across all screens for consistent spacing
- Rename ResultPanel to ToolResultPanel (component, interface, files, and stories)
- Replace Grid layout in ToolsScreen with equal-width flex children for detail and result panels

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

clients/web/src/components/screens/PromptsScreen/PromptsScreen.tsx

@@ -34,7 +34,7 @@ export interface PromptsScreenProps {
 const ScreenLayout = Flex.withProps({
   variant: "screen",
   h: "calc(100vh - var(--app-shell-header-height, 0px))",
-  gap: "xl",
+  gap: "md",
   p: "xl",
 });