fix(app): localize monthly provider usage

docs/i18n.md

@@ -91,4 +91,4 @@ Within a migrated surface, do not leave mixed-language neighboring labels when t
 - Batch 4Z expanded the supported locale set to the six UN official languages: Arabic, Chinese, English, French, Russian, and Spanish. Arabic, French, Russian, and Spanish now have full client-owned UI resource coverage, with key parity, fallback-ratio, and interpolation-placeholder tests guarding the generated translations. Arabic does not enable RTL layout direction in this batch.
 - Batch 5A added Brazilian Portuguese (`pt-BR`) resource coverage, language selector labels, i18next registration, and system-locale mapping for `pt-BR` and bare `pt`. Non-Brazilian Portuguese regional locales remain unsupported until a matching resource is added.
 - Batch 5B added Korean (`ko`) resource coverage, language selector labels, i18next registration, and system-locale mapping for `ko` and Korean regional locales.
-- Batch 5C migrated provider-usage chrome across the Usage settings tab and context-meter tooltip: loading/error/empty states, refresh actions, usage/remaining labels, availability statuses, reset/run-out timing, and updated-at text. Known generic usage labels (`session`, `weekly`, `code_review`, and `credits`) are localized by ID; provider names, plan labels, provider-specific labels, detail labels, source labels, and raw provider errors remain runtime values.
+- Batch 5C migrated provider-usage chrome across the Usage settings tab and context-meter tooltip: loading/error/empty states, refresh actions, usage/remaining labels, availability statuses, reset/run-out timing, and updated-at text. Known generic usage labels (`session`, `five_hour`, `weekly`, `monthly`, `code_review`, `credits`, and `monthly_credits`) are localized by ID; provider names, plan labels, provider-specific labels, detail labels, source labels, and raw provider errors remain runtime values.

packages/app/src/i18n/resources/ar.ts

@@ -1973,8 +1973,10 @@ export const ar: TranslationResources = {
     labels: {
       session: "الجلسة",
       weekly: "أسبوعي",
+      monthly: "شهري",
       codeReview: "مراجعة التعليمات البرمجية",
       credits: "الأرصدة",
+      monthlyCredits: "أرصدة شهرية",
     },
     duration: {
       days: "{{value}} يوم",

packages/app/src/i18n/resources/en.ts

@@ -1998,8 +1998,10 @@ export const en = {
     labels: {
       session: "Session",
       weekly: "Weekly",
+      monthly: "Monthly",
       codeReview: "Code review",
       credits: "Credits",
+      monthlyCredits: "Monthly credits",
     },
     duration: {
       days: "{{value}}d",

packages/app/src/i18n/resources/es.ts

@@ -2021,8 +2021,10 @@ export const es: TranslationResources = {
     labels: {
       session: "Sesión",
       weekly: "Semanal",
+      monthly: "Mensual",
       codeReview: "Revisión de código",
       credits: "Créditos",
+      monthlyCredits: "Créditos mensuales",
     },
     duration: {
       days: "{{value}} d",

packages/app/src/i18n/resources/fr.ts

@@ -2026,8 +2026,10 @@ export const fr: TranslationResources = {
     labels: {
       session: "Session",
       weekly: "Hebdomadaire",
+      monthly: "Mensuel",
       codeReview: "Révision de code",
       credits: "Crédits",
+      monthlyCredits: "Crédits mensuels",
     },
     duration: {
       days: "{{value}} j",

packages/app/src/i18n/resources/ja.ts

@@ -1993,8 +1993,10 @@ export const ja: TranslationResources = {
     labels: {
       session: "セッション",
       weekly: "週間",
+      monthly: "月間",
       codeReview: "コードレビュー",
       credits: "クレジット",
+      monthlyCredits: "月間クレジット",
     },
     duration: {
       days: "{{value}}日",

packages/app/src/i18n/resources/ko.ts

@@ -1983,8 +1983,10 @@ export const ko: TranslationResources = {
     labels: {
       session: "세션",
       weekly: "주간",
+      monthly: "월간",
       codeReview: "코드 검토",
       credits: "크레딧",
+      monthlyCredits: "월간 크레딧",
     },
     duration: {
       days: "{{value}}일",

packages/app/src/i18n/resources/pt-BR.ts

@@ -2006,8 +2006,10 @@ export const ptBR: TranslationResources = {
     labels: {
       session: "Sessão",
       weekly: "Semanal",
+      monthly: "Mensal",
       codeReview: "Revisão de código",
       credits: "Créditos",
+      monthlyCredits: "Créditos mensais",
     },
     duration: {
       days: "{{value}} d",

packages/app/src/i18n/resources/ru.ts

@@ -2006,8 +2006,10 @@ export const ru: TranslationResources = {
     labels: {
       session: "Сессия",
       weekly: "Еженедельно",
+      monthly: "Ежемесячно",
       codeReview: "Проверка кода",
       credits: "Кредиты",
+      monthlyCredits: "Ежемесячные кредиты",
     },
     duration: {
       days: "{{value}} дн.",

packages/app/src/i18n/resources/zh-CN.ts

@@ -1951,8 +1951,10 @@ export const zhCN: TranslationResources = {
     labels: {
       session: "会话",
       weekly: "每周",
+      monthly: "每月",
       codeReview: "代码审查",
       credits: "积分",
+      monthlyCredits: "每月积分",
     },
     duration: {
       days: "{{value}}天",