fix(viewer): suppress THREE.Clock deprecation warning from R3F 9.x (#215)

three.js r183 deprecated THREE.Clock, but @react-three/fiber 9.x still
uses it internally per <Canvas> mount. This floods the dev console with
noise on every page load and HMR reload.

Uses three's setConsoleFunction hook to surgically suppress only the
exact Clock deprecation message. All other three.js logs pass through
untouched, including TSL stack-trace warnings.

Safe to remove once R3F v10 stable ships (which replaces Clock with
Timer). Removal condition documented in file header.

Closes #213

packages/viewer/src/components/viewer/index.tsx

@@ -1,5 +1,9 @@
 'use client'
 
+// Must run before @react-three/fiber's Canvas instantiates new THREE.Clock().
+// See lib/suppress-three-clock-warning.ts for rationale and removal condition.
+import '../../lib/suppress-three-clock-warning'
+
 import {
   CeilingSystem,
   DoorSystem,

packages/viewer/src/lib/suppress-three-clock-warning.ts

@@ -0,0 +1,63 @@
+/**
+ * Suppresses the `THREE.Clock: This module has been deprecated` warning
+ * emitted by three.js r183+ on every `new THREE.Clock()` call.
+ *
+ * We don't instantiate `Clock` ourselves — `@react-three/fiber` 9.x
+ * (current stable) creates one internally per `<Canvas>` mount. The
+ * migration to `THREE.Timer` lands in R3F 10.x (still alpha).
+ *
+ * Uses three's `setConsoleFunction` hook so we don't touch `console.warn`
+ * globally. Only the exact Clock deprecation message is suppressed; all
+ * other three.js logs (including TSL stack-trace warnings) pass through
+ * untouched.
+ *
+ * Runs in production as well as dev — the suppressed message is a pure
+ * deprecation notice with no user-actionable content.
+ *
+ * REMOVAL: safe to delete once `@react-three/fiber` no longer constructs
+ * `new THREE.Clock()`. To verify after an R3F upgrade:
+ *   grep -n "new THREE.Clock" node_modules/@react-three/fiber/dist/*.js
+ * No hits → delete this file and its import in components/viewer/index.tsx.
+ *
+ * @see https://github.com/pascalorg/editor/issues/213
+ */
+
+import { setConsoleFunction } from 'three'
+
+// three's warn() prepends 'THREE.' to its first argument, and the Clock
+// constructor passes 'THREE.Clock: ...', producing a double-prefixed
+// string. Exact equality keeps the suppression surgical — if three ever
+// rewords this, the filter stops matching and the message resurfaces.
+const CLOCK_DEPRECATION_MESSAGE =
+  'THREE.THREE.Clock: This module has been deprecated. Please use THREE.Timer instead.'
+
+type ConsoleMethod = 'log' | 'warn' | 'error'
+
+// HMR-idempotent install guard. setConsoleFunction is a single-slot global
+// in three, so re-evaluating this module on HMR would reinstall the hook.
+const INSTALLED = Symbol.for('@pascal-app/viewer/suppress-three-clock-warning')
+type GlobalWithFlag = typeof globalThis & { [INSTALLED]?: true }
+
+if (!(globalThis as GlobalWithFlag)[INSTALLED]) {
+  ;(globalThis as GlobalWithFlag)[INSTALLED] = true
+
+  setConsoleFunction((method: ConsoleMethod, message: string, ...params: unknown[]) => {
+    if (method === 'warn' && message === CLOCK_DEPRECATION_MESSAGE) {
+      return
+    }
+
+    // Mirror three's default stack-trace handling so TSL warnings/errors
+    // keep their clickable stack frames.
+    if (method !== 'log') {
+      const first = params[0] as
+        | { isStackTrace?: boolean; getError?: (m: string) => Error }
+        | undefined
+      if (first?.isStackTrace && typeof first.getError === 'function') {
+        console[method](first.getError(message))
+        return
+      }
+    }
+
+    console[method](message, ...params)
+  })
+}