Every segment states its hitpoints in the tooltip

'a wall — 20 hitpoints'; battered, 'a wall — 13 of 20 hitpoints left';
doors the same against their 15, lock states included ('held open by a
standing wizard — 15 hitpoints'). The crack overlay already told the
damage; now the wall itself tells what still stands.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0138A8CjeQRpvzKxuMfz1Bqc

packages/web/src/Board.svelte

@@ -396,7 +396,7 @@
       <EdgeGlyph x={e.x} y={e.y} kind={e.kind === "V" ? "V" : "H"}
         state={e.state === "door" ? "door" : "wall"}
         lock={(e.lock ?? null) as "removed" | "jammed" | "held" | "ajar" | null}
-        title={lockTitle} />
+        title={lockTitle} damage={view.wallDamage[`${e.kind}:${e.x},${e.y}`] ?? 0} />
     {/if}
   {/each}