feat(plugins): expose llm input/output hook payloads (openclaw#16724) thanks @SecondThread

Verified:
- pnpm build
- pnpm check
- pnpm test:macmini

Co-authored-by: SecondThread <18317476+SecondThread@users.noreply.github.com>
Co-authored-by: Tak Hoffman <781889+Takhoffman@users.noreply.github.com>

src/infra/control-ui-assets.ts

@@ -97,15 +97,18 @@ export async function resolveControlUiDistIndexPath(
   for (let i = 0; i < 8; i++) {
     const pkgJsonPath = path.join(dir, "package.json");
     const indexPath = path.join(dir, "dist", "control-ui", "index.html");
-    if (fs.existsSync(pkgJsonPath) && fs.existsSync(indexPath)) {
+    if (fs.existsSync(pkgJsonPath)) {
       try {
         const raw = fs.readFileSync(pkgJsonPath, "utf-8");
         const parsed = JSON.parse(raw) as { name?: unknown };
         if (parsed.name === "openclaw") {
-          return indexPath;
+          return fs.existsSync(indexPath) ? indexPath : null;
         }
+        // Stop at the first package boundary to avoid resolving through unrelated ancestors.
+        return null;
       } catch {
-        // Invalid package.json, continue searching
+        // Invalid package.json at package boundary; abort fallback resolution.
+        return null;
       }
     }
     const parent = path.dirname(dir);

src/infra/diagnostic-events.ts

@@ -22,6 +22,13 @@ export type DiagnosticUsageEvent = DiagnosticBaseEvent & {
     promptTokens?: number;
     total?: number;
   };
+  lastCallUsage?: {
+    input?: number;
+    output?: number;
+    cacheRead?: number;
+    cacheWrite?: number;
+    total?: number;
+  };
   context?: {
     limit?: number;
     used?: number;