Translate the remaining shell text at display and keep translated values out of logic

test/shell.d/agent-usage-claude-limits-test.sh

@@ -320,10 +320,12 @@ pass "Claude collector caches a successful probe"
 # The panel reads a window out of a label, and that guess cannot survive a
 # model name — "Opus 5 (1M context)" parses as a one-minute window. A collector
 # that states the title outright is taken at its word.
-run_node_test <<'JS'
+run_node_test <<'JS' || exit 1
 const fs = require('fs')
 const source = fs.readFileSync(root + '/shell/plugins/agents/Panel.qml', 'utf8')
 const panelRoot = { nowMs: Date.now() }
+// The panel's text goes through I18n; English here, with its %1 arguments filled.
+const I18n = { tr: (text, ...args) => text.replace(/%(\d)/g, (m, n) => (n > 0 && n <= args.length ? String(args[n - 1]) : m)) }
 const start = source.indexOf('function windowIsLong')
 const end = source.indexOf('// The window that decides')
 assert(start > 0 && end > start, 'agents panel exposes its limit-window helpers')