Phase 4: Move screen selection state into the screens themselves

ToolsScreen, PromptsScreen, and ResourcesScreen each tracked the user's
current selection via `selectedXxxName` / `onSelectXxx` props, hoisting
screen-local UI state into whatever rendered them. InspectorView never
threaded those callbacks anywhere, so clicks in the controls panel did
not display the matching detail panel — the detail panel only rendered
if a parent fed selection back in.

Move selection into `useState` inside each screen and drop the
`selectedXxxName` / `onSelectXxx` props. MCP-derived data (`callState`,
`getPromptState`, `readState`) keeps flowing in from `InspectorView` as
props. ResourcesScreen wraps `onReadResource` so a template-expanded URI
becomes the selected resource for preview rendering.

Update each screen's stories to drop the deleted props. Stories that
need a pre-selected item use a `play` function to click it — no
component coupling to Storybook.

Add Phase 4.3 to the interfaces plan describing the rule.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

clients/web/src/components/views/InspectorView/InspectorView.tsx

@@ -289,7 +289,6 @@ export function InspectorView({
               tools={tools}
               listChanged={false}
               onRefreshList={noop}
-              onSelectTool={noop}
               onCallTool={noop}
             />
           </ScreenStage>
@@ -298,7 +297,6 @@ export function InspectorView({
               prompts={prompts}
               listChanged={false}
               onRefreshList={noop}
-              onSelectPrompt={noop}
               onGetPrompt={noop}
             />
           </ScreenStage>
@@ -309,8 +307,6 @@ export function InspectorView({
               subscriptions={subscriptions}
               listChanged={false}
               onRefreshList={noop}
-              onSelectUri={noop}
-              onSelectTemplate={noop}
               onReadResource={noop}
               onSubscribeResource={noop}
               onUnsubscribeResource={noop}