chore(autonomous-session): consolidate uncommitted work from prior session

Bundles the prior autonomous-session output that was sitting unstaged:

- Em-dash sweep across src/ + tests/ (en-dash/em-dash to hyphen, ~2280 instances)
- country-flag-icons rollout (CountryFlag component, replaces emoji glyphs that
  never rendered on Windows; lazy-loads the 3x2 SVG index as a single chunk
  after the per-subpath dynamic-import approach silently failed in webpack)
- Admin IA Phase 1+2: 7-domain regroup, 41 to 38 pages, /admin/berths index,
  redirects (ocr to ai, reports to dashboard, invitations to users),
  docs/admin-ia-proposal.md
- Per-template email tester (registry + endpoint + UI on Email admin page)
- Cancel-document mode picker (delete-from-Documenso vs keep-for-audit)
- Dashboard PDF report: 25 widgets, SVG charts, date-range picker, 11 resolvers
- Customize-widgets per-region sortables at xl+ (charts/rails/feed); single
  flat sortable below xl when the layout stacks; per-viewport saved orders
- Audit doc updates capturing each shipped item
- Lint fixes: react-compiler immutability in DonutChart (reduce instead of
  let-reassign), set-state-in-effect disables in CountryFlag and
  UploadForSigning preview-bytes effect, unused 'confirm' destructures in
  interest contract + reservation tabs, unescaped apostrophe in test-template
  card copy

src/components/files/pdf-viewer.tsx

@@ -51,7 +51,7 @@ function PdfViewerBody({ url, fileName }: PdfViewerProps) {
   const [error, setError] = useState<string | null>(null);
 
   // Keep options stable across renders so react-pdf doesn't refetch
-  // every render — useMemo wins because react-pdf compares by identity.
+  // every render - useMemo wins because react-pdf compares by identity.
   const options = useMemo(
     () => ({
       cMapUrl: `https://unpkg.com/pdfjs-dist@${pdfjs.version}/cmaps/`,
@@ -70,7 +70,7 @@ function PdfViewerBody({ url, fileName }: PdfViewerProps) {
     {
       scaleBounds: { min: 0.5, max: 3 },
       from: () => [scale, 0],
-      // Don't hijack wheel events — desktop users zoom via buttons,
+      // Don't hijack wheel events - desktop users zoom via buttons,
       // wheel still scrolls the page.
       eventOptions: { passive: false },
     },
@@ -91,7 +91,7 @@ function PdfViewerBody({ url, fileName }: PdfViewerProps) {
             <ChevronLeft className="h-4 w-4" />
           </Button>
           <span className="min-w-[80px] text-center tabular-nums">
-            {numPages ? `${pageNumber} / ${numPages}` : '—'}
+            {numPages ? `${pageNumber} / ${numPages}` : '-'}
           </span>
           <Button
             type="button"