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

src/components/ai/AiInsightsPanel.tsx

@@ -1,5 +1,6 @@
 import { useEffect, useMemo } from "react";
 import { useMutation } from "@tanstack/react-query";
+import { useTranslation } from "react-i18next";
 import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";
 import { Sparkles, TrendingUp, AlertTriangle, Info, Loader2 } from "lucide-react";
 import { analyticsService, type AiInsightItem } from "@/services/analytics.service";
@@ -35,14 +36,15 @@ interface Props {
 
 export default function AiInsightsPanel({ data = EMPTY_PAYLOAD }: Props) {
   const { toast } = useToast();
+  const { t } = useTranslation();
   const payloadKey = useMemo(() => JSON.stringify(data), [data]);
 
   const mutation = useMutation({
     mutationFn: (payload: Record<string, unknown>) => analyticsService.getInsights(payload),
     onError: (err: Error) => {
       toast({
-        title: "Insights unavailable",
-        description: err.message || "Could not load AI insights.",
+        title: t("ai.insightsUnavailable"),
+        description: err.message || t("ai.couldNotLoadInsights"),
         variant: "destructive",
       });
     },
@@ -60,21 +62,21 @@ export default function AiInsightsPanel({ data = EMPTY_PAYLOAD }: Props) {
       <CardHeader className="pb-3">
         <CardTitle className="text-base font-semibold flex items-center gap-2">
           <Sparkles className="h-4 w-4 text-primary" />
-          AI Platform Insights
+          {t("ai.platformInsightsTitle")}
         </CardTitle>
       </CardHeader>
       <CardContent>
         {mutation.isPending && (
           <div className="flex items-center gap-2 text-sm text-muted-foreground py-8 justify-center">
             <Loader2 className="h-5 w-5 animate-spin text-primary" />
-            Loading insights…
+            {t("ai.loadingInsights")}
           </div>
         )}
         {mutation.isError && !mutation.isPending && (
-          <p className="text-sm text-muted-foreground py-4 text-center">Could not load insights.</p>
+          <p className="text-sm text-muted-foreground py-4 text-center">{t("ai.couldNotLoadInsights")}</p>
         )}
         {mutation.isSuccess && items.length === 0 && (
-          <p className="text-sm text-muted-foreground py-4 text-center">No insights available for this view.</p>
+          <p className="text-sm text-muted-foreground py-4 text-center">{t("ai.noInsightsAvailable")}</p>
         )}
         {!mutation.isPending && items.length > 0 && (
           <div className="grid grid-cols-1 md:grid-cols-3 gap-4">
@@ -82,10 +84,10 @@ export default function AiInsightsPanel({ data = EMPTY_PAYLOAD }: Props) {
               const Icon = insightIcon(item.severity);
               const color = insightColor(item.severity);
               return (
-                <div key={idx} className="rounded-lg border bg-muted/30 p-4">
+                <div key={idx} className="rounded-lg border bg-muted/30 p-4" dir="auto">
                   <div className="flex items-center gap-2 mb-2">
-                    <Icon className={`h-4 w-4 ${color}`} />
-                    <span className="text-sm font-semibold">{item.title}</span>
+                    <Icon className={`h-4 w-4 shrink-0 ${color}`} />
+                    <span className="text-sm font-semibold min-w-0">{item.title}</span>
                   </div>
                   <p className="text-sm text-muted-foreground">{item.description}</p>
                   {item.recommendation && (