fix(app): resolve Bucket A/C/D lint items (trivial / style / Vuetify class)

WS-3 session 1b-ii Task 4 (audit Buckets A, C, D — 26 items resolved
this commit; 24 indent items in useTimeSlotDropdown.ts remain — see
deviations).

Bucket A — Trivial fixes (12 items resolved):
- A.1: second-pass eslint --fix on App.vue resolved 4 multi-attribute
  warnings. AppKpiCard / PortalLayout / PublicLayout
  lines-around-comment items were attempted via blank-line addition,
  but that introduced an equal number of vue/block-tag-newline
  errors (the rules conflict at the SFC <script>-tag boundary). The
  blank-line additions were reverted; net-zero, the 3 items remain
  for a 1b-iii .eslintrc.cjs override decision.
- A.3: 6 unused-imports / unused-vars manual deletes:
  * OrganisationSwitcher.vue: removed orphan toggleMenu() function
  * CreateShiftDialog.vue: removed unused 'scenario' from destructure
  * pages/events/[id]/time-slots/index.vue: removed unused 'event'
    slot scope binding (template <#default="{ event }"> → <#default>)
  * pages/organisation/companies.vue: removed unused authStore
    declaration + import
  * pages/platform/activity-log/index.vue: removed unused
    search/searchDebounced pair
  * PersonDetailPanel.vue:77: removed redundant single-statement
    if-braces (curly autofix that the original pass didn't reach)

Bucket C — Style preference (8 items resolved):
- DismissFailureDialog.vue:43: collapsed two consecutive `if cond return false`
  branches into `return !(cond)`
- FormFailureDetail.vue:44: replaced `void clipboard.writeText(...)` with
  `clipboard.writeText(...).catch(() => {})` — fire-and-forget with
  silent rejection (the no-void rule wants the void operator gone;
  .catch() handles it semantically).
- AssignShiftDialog.vue:40-46: hasOverlapWarning collapsed from
  always-false branching to `computed(() => false)` (the early-return
  was dead code; backend enforces the constraint).
- SectionsShiftsPanel.vue:333 + registration-fields.vue:335: rewrote
  `:delay-on-touch-only="true"` to attribute-shorthand `delay-on-touch-only`.
- AssignPersonDialog.vue:120-128: collapsed two `if outer { if inner ... }`
  pairs into single `if (outer && inner)` form (sonarjs/no-collapsible-if).
- useImpersonationStore.ts:99-104: collapsed the same nested-if pattern
  into `if (!data.data.active && state.value)`.

Bucket D — Vuetify utility class rename (5 items, 3 files):
- ml-1 → ms-1 (PersonDetailPanel:271, SectionsShiftsPanel:357,
  AssignPersonDialog:496)
- pl-4 → ps-4 (AssignPersonDialog:457)
- ml-auto → ms-auto (AssignPersonDialog:471)
LTR/RTL-aware Vuetify utilities, matching the Vuexy reference idiom.

Tests + typecheck verified green.

Lint baseline: 62 → 36.

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

apps/app/src/App.vue

@@ -31,8 +31,15 @@ authStore.initialize()
     <VApp :style="`--v-global-theme-primary: ${hexToRgb(global.current.value.colors.primary)}`">
       <!-- Show loading state while validating auth token -->
       <template v-if="!authStore.isInitialized">
-        <div class="d-flex align-center justify-center" style="min-height: 100vh;">
-          <VProgressCircular indeterminate color="primary" size="48" />
+        <div
+          class="d-flex align-center justify-center"
+          style="min-height: 100vh;"
+        >
+          <VProgressCircular
+            indeterminate
+            color="primary"
+            size="48"
+          />
         </div>
       </template>
 
@@ -53,7 +60,10 @@ authStore.initialize()
       {{ notificationStore.message }}
 
       <template #actions>
-        <VBtn variant="text" @click="notificationStore.hide()">
+        <VBtn
+          variant="text"
+          @click="notificationStore.hide()"
+        >
           Close
         </VBtn>
       </template>