style(app): strip trailing-whitespace residue from Tier 1 + 2 autofix

WS-3 session 1b-i Task 3.

The Tier 1 + Tier 2 autofix passes (curly-brace stripping in
particular) left trailing whitespace on the affected lines. \`git diff
--check\` flagged 1 file with 7 trailing-whitespace lines:

- apps/app/src/layouts/components/DefaultLayoutWithVerticalNav.vue

Used full-file sed strip per the prompt's <30-files decision rule.

Once the trailing whitespace was gone, a follow-up
\`eslint --fix\` on the same file resolved 8 additional cascading
items that the original Tier 1 pass couldn't reach because of
ESLint's default 10-pass cap (curly-strip → exposed-indent →
multi-blank-line cascade). The re-indented body is now consistent
(4/8/6 spaces), no logic touched. This second-pass cleanup is folded
into this commit because it was triggered by — and is only a
mechanical follow-up to — the whitespace strip.

Other Tier 1 / Tier 2 files may have similar pass-cap residue
(161 fixable items remain in the post-Tier-2 baseline). Those are
deferred to session 1b-ii's planned second-pass autofix and are
flagged in the audit report.

Tests + typecheck still green.

Lint baseline progression:
- Pre-Task-3 (post-Tier-2): 246 problems
- Post-Task-3: 231 problems

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

apps/app/src/layouts/components/DefaultLayoutWithVerticalNav.vue

@@ -25,27 +25,25 @@ const navItems = computed(() => {
   const orgName = authStore.currentOrganisation?.name ?? 'Beheer'
 
   let orgItems = orgNavItems.map(item => {
-    if ('heading' in item && item.heading === 'Beheer') 
+    if ('heading' in item && item.heading === 'Beheer')
       return { ...item, heading: orgName }
-    
-    
-return item
+
+    return item
   })
 
   // During impersonation: hide org-dependent items if user has no organisation
   if (impersonationStore.isImpersonating && !hasOrganisation.value) {
     orgItems = orgItems.filter(item => {
-      if ('heading' in item) 
-return false
-      
-return 'to' in item && item.to?.name === 'dashboard'
+      if ('heading' in item)
+        return false
+
+      return 'to' in item && item.to?.name === 'dashboard'
     })
   }
 
   // Platform items: only for super_admin AND only when NOT impersonating
-  if (authStore.isSuperAdmin && !impersonationStore.isImpersonating) 
+  if (authStore.isSuperAdmin && !impersonationStore.isImpersonating)
     return [...orgItems, ...platformNavItems]
-  
 
   return orgItems
 })