perf(post-processing): don't rebuild the pipeline on hover + temp paint debug logs

- post-processing: hoverHighlightMode was a dependency of the pipeline-build
  effect, so every hover rebuilt the entire pipeline. The hover style is already
  pushed to uniforms in a separate effect, so the rebuild was pure waste —
  removed it from the deps (and the build log).
- selection-manager: temporary [paint-debug] logs for window/door hover to trace
  why their paint dispatch drops (to be removed once diagnosed).

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

packages/viewer/src/components/viewer/post-processing.tsx

@@ -280,7 +280,6 @@ const PostProcessingPasses = ({
       denoise: denoiseEnabled,
       outline: outlineEnabled,
       perfDisable,
-      hoverHighlightMode,
       projectId,
       shading,
       rendererCtor: (renderer as any).constructor?.name,
@@ -487,9 +486,12 @@ const PostProcessingPasses = ({
       renderPipelineRef.current = null
     }
   }, [
+    // NOTE: hoverHighlightMode intentionally excluded — the hover style is
+    // pushed to uniforms in a separate effect, so a hover must NOT rebuild the
+    // whole pipeline. The uniform refs below are stable (useMemo), so they
+    // never trigger a rebuild either.
     camera,
     hoverHiddenColor,
-    hoverHighlightMode,
     hoverPulseMix,
     hoverStrength,
     hoverVisibleColor,