fix: low audit items — email channel, debug cleanup, roadmap sync, bare except logging

L18: remove comingSoon from email notification channel (SMTP backend already exists).
L19: remove console.debug useEffect from InlineCadViewer.tsx.
L20: sync ROADMAP.md priority status sections (P1/P2/P3/P8) with status snapshot — all Done.
L22: replace 8 bare except blocks in step_processor.py with logger.debug/warning
     so geometry calculation failures are visible in logs instead of silently discarded.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/src/components/cad/InlineCadViewer.tsx

@@ -395,21 +395,6 @@ export default function InlineCadViewer({
   }, [modelReady, pinnedPart, isolateMode, hideAssigned, partMaterials])
 
   // Dev-only: log normalized GLB mesh names vs stored keys to diagnose mismatches
-  useEffect(() => {
-    if (!import.meta.env.DEV || !modelReady || meshRegistryRef.current.length === 0) return
-    const names = new Set<string>(meshRegistryRef.current.map(e => e.partKey))
-    const keys = Object.keys(partMaterials)
-    const matched = keys.filter(k => names.has(k))
-    const unmatched = keys.filter(k => !names.has(k))
-    console.debug('[CAD] Match status:', {
-      totalGlbMeshes: names.size,
-      totalStoredKeys: keys.length,
-      matched: matched.length,
-      unmatched: unmatched.length,
-      unmatchedKeys: unmatched,
-      glbNames: [...names].sort(),
-    })
-  }, [modelReady, partMaterials])
 
   const generateMut = useMutation({
     mutationFn: () => generateGltfGeometry(cadFileId),

frontend/src/pages/NotificationSettings.tsx

@@ -20,7 +20,7 @@ const EVENT_LABELS: Record<string, string> = {
 const ALL_EVENTS = Object.keys(EVENT_LABELS)
 const CHANNELS: Array<{ key: 'in_app' | 'email'; label: string; comingSoon?: boolean }> = [
   { key: 'in_app', label: 'In-App' },
-  { key: 'email', label: 'E-Mail', comingSoon: true },
+  { key: 'email', label: 'E-Mail' },
 ]
 
 const FREQUENCY_OPTIONS: Array<{ value: string; label: string }> = [