feat(i18n,rtl): full Arabic localization + RTL sweep across all layouts

Frontend
- i18n: install tailwindcss-rtl, Cairo font, RTL-aware direction in index.css.
- Language toggle: localize aria-label / menu label, persist choice, update
  document dir synchronously.
- Sidebar: add `side` prop so the drawer pins to the right in RTL; wire up
  AdminLmsLayout, RoleLayout (student/teacher) and AppSidebar to pass
  side = i18n.dir() === 'rtl' ? 'right' : 'left'.
- AdminLmsLayout: convert every nav item from hard-coded title to titleKey,
  translate group labels (incl. the collapsible Training), breadcrumbs,
  user menu (Profile / Settings / Logout), help button and toggle aria
  labels; replace physical mr-/right- utilities with logical me-/end-.
- AI components (AiTipBanner, AiInsightsPanel, AiAlertBanner, AiSearchBar,
  AiAssistantDrawer): apply dir="auto" at the container level, localize
  titles, loading / error / empty states.
- Dashboards (admin / student / teacher): wrap numeric values in <bdi>,
  localize dates via ar-EG, fix flex direction for KPI and assignment cards.
- UI primitives (breadcrumb, calendar, carousel, dropdown-menu, menubar,
  context-menu, pagination, sidebar): flip chevrons in RTL via a scoped
  CSS rule, swap pl-/pr-/ml-/mr- for ps-/pe-/ms-/me-.
- Add logical-direction helpers and bidirectional isolation classes.

Locales
- Expand en.ts and ar.ts with full `nav`, `sidebarGroup`, `breadcrumb`,
  `userMenu`, `chrome`, `ai`, and dashboard key sets; keep key parity.

API client
- `api-client.ts` reads the active language from localStorage/i18n and sends
  `Accept-Language` on every request so the backend can localize AI output.

Backend (encoach_ai)
- openai_service: add _LANGUAGE_NAMES, normalize_language, language-aware
  system prompt injection for every OpenAI call.
- coach_service + controllers (coach_controller, ai_controller): thread
  the requested language from headers / user locale down to OpenAIService.
- ai_feedback: fix latent registry error by pointing course_id at op.course
  instead of the non-existent encoach.course.

Other
- .gitignore: ignore runtime odoo logs and local caches.

Made-with: Cursor

frontend/src/pages/ExamStructuresPage.tsx

@@ -1355,11 +1355,11 @@ export default function ExamStructuresPage() {
           const examType = getExamTypeBadge(s);
           return (
             <Card key={s.id} className="border-0 shadow-sm hover:shadow-md transition-shadow cursor-pointer" onClick={() => setEditTarget(s)}>
-              <CardHeader className="pb-3">
-                <div className="flex items-center justify-between">
-                  <CardTitle className="text-base font-semibold flex items-center gap-2">
-                    <Layers className="h-4 w-4 text-primary" />{s.name}
-                  </CardTitle>
+            <CardHeader className="pb-3">
+              <div className="flex items-center justify-between">
+                <CardTitle className="text-base font-semibold flex items-center gap-2">
+                  <Layers className="h-4 w-4 text-primary" />{s.name}
+                </CardTitle>
                   <div className="flex gap-1">
                     <Button variant="ghost" size="icon" className="h-8 w-8 text-muted-foreground hover:text-primary"
                       onClick={(e) => { e.stopPropagation(); setEditTarget(s); }}>
@@ -1370,9 +1370,9 @@ export default function ExamStructuresPage() {
                       <Trash2 className="h-4 w-4" />
                     </Button>
                   </div>
-                </div>
-              </CardHeader>
-              <CardContent>
+              </div>
+            </CardHeader>
+            <CardContent>
                 <div className="flex items-center gap-3 text-sm text-muted-foreground mb-3 flex-wrap">
                   {s.entity_name && <span>Entity: <span className="text-foreground font-medium">{s.entity_name}</span></span>}
                   {s.industry && <span>Industry: <span className="text-foreground font-medium">{s.industry}</span></span>}
@@ -1382,9 +1382,9 @@ export default function ExamStructuresPage() {
                   {(Array.isArray(s.modules) ? s.modules : []).map((m) => (
                     <Badge key={m} variant="secondary" className="capitalize text-xs">{m}</Badge>
                   ))}
-                </div>
-              </CardContent>
-            </Card>
+              </div>
+            </CardContent>
+          </Card>
           );
         })}
       </div>