lighter first load, math reads left-to-right in quizzes, tickets from the server, readable separators

- Every screen but home is its own chunk and preloads when the browser is
  idle; React and motion get their own long-cached chunks. The app entry
  goes from 505 kB (160 kB gzip) to 85 kB (27 kB gzip).
- Quiz prompts, options and lesson examples go through MathText, so
  '10 + 3 - 7 - 2' reads from the left; an unpaired bracket at the edge of
  a math run stays with the Persian sentence.
- Support lists tickets from GET /support/tickets instead of this
  browser's localStorage; a ticket's messages load when it is opened.
- '·' next to a Persian zero read as another digit ('فصلِ ۱ · ۰' looked
  like ۱۰۰); a thin bar separates them now. Notification bodies show
  Persian digits.
- A root or vertex the model already marked with coordinates is no longer
  labelled a second time on top of it.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/screens/HomeScreen.tsx

@@ -7,7 +7,7 @@ import { useNav } from '@/nav/Navigator';
 import { SeyarMascot } from '@/mascots/SeyarMascot';
 import { IslandPath } from '@/components/IslandPath';
 import { IslandSheet } from '@/components/IslandSheet';
-import { EmptyState, ErrorState, LoadingState, Screen } from '@/components/ui';
+import { EmptyState, ErrorState, LoadingState, Screen, Sep } from '@/components/ui';
 import { shade } from '@/lib/color';
 import { toFa } from '@/lib/format';
 
@@ -109,7 +109,7 @@ export function HomeScreen() {
                   >
                     <div className="min-w-0 flex-1">
                       <div className="text-[11px] font-bold text-white/80">
-                        فصلِ {toFa(i + 1)} · {toFa(p.done)} از {toFa(p.total)} جزیره
+                        فصلِ {toFa(i + 1)}<Sep />{toFa(p.done)} از {toFa(p.total)} جزیره
                         {isCurrentUnit && <span className="mr-1.5 rounded-full bg-white/25 px-2 py-0.5">الان اینجایی</span>}
                       </div>
                       <div className="mt-0.5 truncate text-[15px] font-black">{unit.title.replace(/^فصل\s*\S+\s*[:：]\s*/, '')}</div>