fix(i18n): add the /context catalog block to ar.yaml (missed in the 17-locale sweep)

locales/ar.yaml

@@ -25,6 +25,24 @@ approval:
   blocklist_message: "هذا الأمر مدرج في قائمة الحظر غير المشروطة ولا يمكن الموافقة عليه."
 
 gateway:
+  context:
+    header:                "🧠 **Context Window**"
+    model:                 "Model: `{model}`"
+    window:                "Window: {total} tokens"
+    in_use:                "In use: {used} / {total} ({pct}%)"
+    bar:                   "{bar}"
+    headroom:              "Headroom to limit: {headroom} tokens"
+    threshold:             "Auto-compresses at: {threshold} ({threshold_pct}%) — {to_go} to go"
+    over_threshold:        "⚠️ **Over auto-compression threshold ({threshold}, {threshold_pct}%)**"
+    compressions:          "Compressions this session: {count}"
+    last_savings:          "Last compression freed: {savings}% of context"
+    totals_header:         "Session totals (cumulative across {calls} API calls)"
+    totals_line:           "Input {input} · Output {output} · Reasoning {reasoning}"
+    total_billed:          "Total billed: {total}"
+    throughput_note:       "_Throughput, not context size — each call re-sends the window above._"
+    estimated:             "Estimated context: ~{count} tokens across {messages} messages"
+    detail_after_first:    "_(Full compression and throughput stats available after the first agent response)_"
+    no_data:               "No context data available yet. Send a message to start a session."
   approval_expired: "⚠️ انتهت صلاحية الموافقة (لم يعد الوكيل ينتظر). اطلب من الوكيل المحاولة مرة أخرى."
   draining:         "⏳ جارٍ إنهاء {count} وكيل نشط قبل إعادة التشغيل..."
   goal_cleared:     "✓ تم مسح الهدف."