feat(ui): localize UI strings

Converts hardcoded UI copy to i18n keys across the app, adds global translation for non-component modules, and splits the English catalog into feature modules with duplicate-key detection.

packages/ui/src/components/permission-notification-banner.tsx

@@ -1,5 +1,6 @@
 import { Show, createMemo, type Component } from "solid-js"
 import { ShieldAlert } from "lucide-solid"
+import { useI18n } from "../lib/i18n"
 import { getPermissionQueueLength, getQuestionQueueLength } from "../stores/instances"
 
 interface PermissionNotificationBannerProps {
@@ -8,17 +9,38 @@ interface PermissionNotificationBannerProps {
 }
 
 const PermissionNotificationBanner: Component<PermissionNotificationBannerProps> = (props) => {
+  const { t } = useI18n()
   const permissionCount = createMemo(() => getPermissionQueueLength(props.instanceId))
   const questionCount = createMemo(() => getQuestionQueueLength(props.instanceId))
   const queueLength = createMemo(() => permissionCount() + questionCount())
   const hasRequests = createMemo(() => queueLength() > 0)
   const label = createMemo(() => {
     const total = queueLength()
+
+    const pendingLabel = total === 1
+      ? t("permissionBanner.pendingRequests.one", { count: total })
+      : t("permissionBanner.pendingRequests.other", { count: total })
+
     const parts: string[] = []
-    if (permissionCount() > 0) parts.push(`${permissionCount()} permission${permissionCount() === 1 ? "" : "s"}`)
-    if (questionCount() > 0) parts.push(`${questionCount()} question${questionCount() === 1 ? "" : "s"}`)
-    const detail = parts.length ? ` (${parts.join(", ")})` : ""
-    return `${total} pending request${total === 1 ? "" : "s"}${detail}`
+
+    if (permissionCount() > 0) {
+      parts.push(
+        permissionCount() === 1
+          ? t("permissionBanner.detail.permission.one", { count: permissionCount() })
+          : t("permissionBanner.detail.permission.other", { count: permissionCount() }),
+      )
+    }
+
+    if (questionCount() > 0) {
+      parts.push(
+        questionCount() === 1
+          ? t("permissionBanner.detail.question.one", { count: questionCount() })
+          : t("permissionBanner.detail.question.other", { count: questionCount() }),
+      )
+    }
+
+    const detail = parts.length ? t("permissionBanner.detail.wrapper", { detail: parts.join(", ") }) : ""
+    return `${pendingLabel}${detail}`
   })
 
   return (