fix(web): make sidebar lists, monitor panels, and Tools placeholder fill height (#1663) (#1664)

Three related "fill the available height" layout fixes to the connected screens:

- Tools & Prompts sidebars: replace the fixed magic max-height on ToolControls/
  PromptControls with the Resources pattern — sidebar Card `variant="sidebar"`
  (full-height flex column) + `Stack flex={1} mih={0}` + a flex-filling
  ScrollArea — so the list runs to the bottom of the card before scrolling.
- Logs/Console/Protocol/Network standalone screens: only override ScreenLayout
  `h` when embedded. Passing `h={undefined}` clobbered the default
  `h: calc(100dvh - header)` (withProps plain-spreads), collapsing an empty
  screen to its controls' height. Also center the Network/Protocol empty states.
- Tools placeholder: render the "Select a tool" empty state in a full-height
  `DetailCard flex={1}` (like Prompts/Resources) instead of the content-sized
  preview card, so it fills the pane.


Claude-Session: https://claude.ai/code/session_015sMW1YZXkM7fDkdPtHpE95

Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

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

@@ -104,7 +104,10 @@ export function ProtocolScreen({
   }, [ui, visibleDirections, onUiChange]);
 
   return (
-    <ScreenLayout h={embedded ? "100%" : undefined}>
+    // See LoggingScreen: only override `h` when embedded, so the standalone
+    // screen keeps ScreenLayout's default full-screen height (a `h={undefined}`
+    // would clobber it and collapse an empty screen to its controls' height).
+    <ScreenLayout {...(embedded ? { h: "100%" } : {})}>
       {embedded ? null : (
         <Sidebar>
           <SidebarCard>