docs: 新增西班牙语和日语README并优化多语言文档

新增README-ES.md（西班牙语）和README-JA.md（日语）文档，完善多语言README互链。优化各语言README徽章、技术栈、外链格式及语言切换区，提升文档一致性与可读性。

src/composables/useHints.ts

@@ -106,6 +106,14 @@ const hints: Hint[] = [
     icon: 'swords',
     delay: 500
   },
+  {
+    id: 'campaign_intro',
+    route: '/campaign',
+    titleKey: 'hints.campaign.title',
+    messageKey: 'hints.campaign.message',
+    icon: 'map',
+    delay: 500
+  },
   {
     id: 'achievements_intro',
     route: '/achievements',
@@ -114,6 +122,14 @@ const hints: Hint[] = [
     icon: 'trophy',
     delay: 500
   },
+  {
+    id: 'ranking_intro',
+    route: '/ranking',
+    titleKey: 'hints.ranking.title',
+    messageKey: 'hints.ranking.message',
+    icon: 'medal',
+    delay: 500
+  },
   {
     id: 'settings_intro',
     route: '/settings',
@@ -138,7 +154,7 @@ const isHintVisible = ref(false)
 
 let hintTimeout: ReturnType<typeof setTimeout> | null = null
 
-export function useHints() {
+export const useHints = () => {
   const router = useRouter()
   const gameStore = useGameStore()