Delete three pockets of dead code, on evidence

1. App\Mail\LoginCodeMail + its Blade view. Login codes go through
   SystemEmail::send('login_code', …), whose TEMPLATES entry carries its own
   plain-text body — the `emails.login-code` view was referenced ONLY from
   LoginCodeMail::content(). Checked all 30 repos: the remaining hits were the
   class itself, two now-unused imports in LoginCodeService, its own render test,
   and one historical plan doc (prose, left).

2. CustomFieldsController::index(). It rendered 'Admin/Tables', and **no
   Tables.vue exists anywhere in the workspace** — so it would have blank-screened
   even if something routed to it, and nothing does. The live editor is
   Admin → User Settings → Fields (UserSettingsController::index builds a strict
   superset of that payload), and /admin/settings/tables already redirects there.
   All four registered actions (store/update/destroy/reorder) still route and were
   re-verified by name after the change. A docblock now records where the UI lives
   so the method does not get re-added.

3. Thirteen stale Vue duplicates in dashboard-expenses and dashboard-ticketing.
   Those pages are served FROM THE SHELL — app.js resolves ./Pages/** before any
   packages/* glob, Ticketing was never globbed at all, and the built manifest
   carried the packages/expenses copies only as shadowed dead weight. All 13 were
   diffed against the shell before deletion: every one is the April original plus
   the July full-width sweep. Two were not merely stale but BROKEN —
   Expenses/Budgets called route('expenses.budgets.index'), a name that does not
   exist, and BudgetEdit still used fiscal_year after the controller moved to
   schoolYears. One genuine difference is noted rather than lost: the snap-in's
   Ticketing/Create gated its "Go to Settings" link on isSiteAdmin while the
   shell's shows it unconditionally, so a non-admin sees a link that 403s — a
   pre-existing shell behaviour (Index.vue does the same), not caused by this.

   This matters because config/inertia.php now registers snap-in page roots for
   tests: a page added ONLY to a snap-in copy would have PASSED tests while 404ing
   in a browser. resources/js/app.js drops the dangling packages/expenses glob,
   with a comment tying its list to config/inertia.php so the two cannot drift.

Bonus: the same trap existed in dashboard-unifi, whose resources/js/Pages was an
empty untracked scaffold that app.js never globbed. Removed. The glob now returns
exactly the four roots app.js resolves — admissions, forms, tuition, verification.

Tests: 83 (was 84; -1 is the deleted mailable render test), doctor exit 0, and a
browser pass over all seven Expenses/Ticketing pages plus /admin/user-settings/fields
and /admin/settings/tables — 200, mounted, zero console errors. /app/ticketing/create
renders the attachments input, proving the shell copy is what serves.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

composer.json

@@ -1,7 +1,7 @@
 {
     "name": "dashboard/ticketing",
     "description": "Help desk ticketing snap-in for the Dashboard platform",
-    "version": "1.0.2",
+    "version": "1.0.3",
     "type": "library",
     "require": {
         "php": "^8.2",