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

tests/unit/security-error-responses.test.ts

@@ -55,7 +55,7 @@ import {
 
 // ─────────────────────────────────────────────────────────────────────────────
 
-describe('Error response security — AppError subclasses', () => {
+describe('Error response security - AppError subclasses', () => {
   it('AppError returns correct status without leaking constructor args', async () => {
     const error = new AppError(400, 'Bad request', 'BAD_REQUEST');
     const response = errorResponse(error);
@@ -110,7 +110,7 @@ describe('Error response security — AppError subclasses', () => {
   });
 });
 
-describe('Error response security — unknown / native errors', () => {
+describe('Error response security - unknown / native errors', () => {
   it('native Error with SQL content returns generic 500', async () => {
     const error = new Error('SELECT * FROM users WHERE id = 1; DROP TABLE users;--');
     const response = errorResponse(error);
@@ -170,7 +170,7 @@ describe('Error response security — unknown / native errors', () => {
   });
 });
 
-describe('Error response security — ZodError', () => {
+describe('Error response security - ZodError', () => {
   it('ZodError returns 400 with VALIDATION_ERROR code', async () => {
     const { ZodError, ZodIssueCode } = await import('zod');
     const error = new ZodError([
@@ -214,7 +214,7 @@ describe('Error response security — ZodError', () => {
   });
 });
 
-describe('Error response security — response shape invariants', () => {
+describe('Error response security - response shape invariants', () => {
   it('every AppError response body follows { error, code } shape', async () => {
     const errors = [
       new AppError(400, 'Bad request', 'BAD_REQUEST'),