fix(hub,web): correct cache-aware usage accounting

via [HAPI](https://hapi.run)\n\nCo-Authored-By: HAPI <noreply@hapi.run>

web/src/lib/locales/en.ts

@@ -643,7 +643,7 @@ export default {
   'settings.storage.refreshing': 'Refreshing…',
   'settings.usage.title': 'Token usage',
   'settings.usage.summary': 'Token-only usage dashboard',
-  'settings.usage.description': 'Token consumption recorded by HAPI sessions. Costs are not included.',
+  'settings.usage.description': 'Tokens processed by HAPI sessions. Cache hits are counted once and shown separately; costs are not included.',
   'settings.usage.range.label': 'Usage range',
   'settings.usage.range.7d': '7 days',
   'settings.usage.range.30d': '30 days',
@@ -651,10 +651,11 @@ export default {
   'settings.usage.loading': 'Loading token usage…',
   'settings.usage.error': 'Unable to load token usage',
   'settings.usage.empty': 'No token usage recorded for this range.',
-  'settings.usage.total': 'Total tokens (input + output)',
+  'settings.usage.total': 'Processed tokens (cache included)',
+  'settings.usage.uncached': 'Non-cached tokens',
   'settings.usage.input': 'Input tokens (includes cache)',
   'settings.usage.output': 'Output tokens',
-  'settings.usage.cacheRead': 'Cache read (included)',
+  'settings.usage.cacheRead': 'Cache read (included in input)',
   'settings.usage.cacheCreation': 'Cache creation (included)',
   'settings.usage.requests': 'Requests',
   'settings.usage.daily.title': 'Daily trend',

web/src/lib/locales/zh-CN.ts

@@ -647,7 +647,7 @@ export default {
   'settings.storage.refreshing': '正在刷新…',
   'settings.usage.title': 'Token 用量',
   'settings.usage.summary': 'Token 用量看板',
-  'settings.usage.description': '统计 HAPI 会话记录的 Token 消耗，不包含费用估算。',
+  'settings.usage.description': '统计 HAPI 会话处理的 Token；缓存命中只计算一次并单独展示，不包含费用估算。',
   'settings.usage.range.label': '用量范围',
   'settings.usage.range.7d': '近 7 天',
   'settings.usage.range.30d': '近 30 天',
@@ -655,10 +655,11 @@ export default {
   'settings.usage.loading': '正在加载 Token 用量…',
   'settings.usage.error': '无法加载 Token 用量',
   'settings.usage.empty': '此范围内没有记录到 Token 用量。',
-  'settings.usage.total': '总 Token（输入 + 输出）',
+  'settings.usage.total': '处理 Token（含缓存）',
+  'settings.usage.uncached': '非缓存 Token',
   'settings.usage.input': '输入 Token（含缓存）',
   'settings.usage.output': '输出 Token',
-  'settings.usage.cacheRead': '缓存命中（已计入）',
+  'settings.usage.cacheRead': '缓存命中（已计入输入）',
   'settings.usage.cacheCreation': '缓存创建（已计入）',
   'settings.usage.requests': '请求数',
   'settings.usage.daily.title': '每日趋势',

web/src/routes/settings/usage.tsx

@@ -76,9 +76,10 @@ export default function SettingsUsagePage() {
             {query.error ? <SettingsSection><SettingsRow label={t('settings.usage.error')} description={query.error instanceof Error ? query.error.message : undefined} /></SettingsSection> : null}
             {query.data ? (
                 <>
-                    <div className="grid grid-cols-2 gap-2 sm:grid-cols-3">
+                    <div className="grid grid-cols-2 gap-2 sm:grid-cols-4">
                         {[
                             ['settings.usage.total', query.data.totals.totalTokens],
+                            ['settings.usage.uncached', query.data.totals.uncachedTokens],
                             ['settings.usage.input', query.data.totals.inputTokens],
                             ['settings.usage.output', query.data.totals.outputTokens],
                             ['settings.usage.cacheRead', query.data.totals.cacheReadTokens],