feat: improve quota toast with ByteDance Doubao sponsorship info and model config button (#447)

- Add 'Use Your API Key' button to open model config dialog
- Add ByteDance Doubao sponsorship message with registration link
- Update quota limit messages to be warmer and friendlier
- Add dev panel button to test quota toast
- Update i18n translations for EN, ZH, JA

components/chat-panel.tsx

@@ -185,6 +185,7 @@ export default function ChatPanel({
         dailyRequestLimit,
         dailyTokenLimit,
         tpmLimit,
+        onConfigModel: () => setShowModelConfigDialog(true),
     })
 
     // Generate a unique session ID for Langfuse tracing (restore from localStorage if available)
@@ -1036,6 +1037,9 @@ export default function ChatPanel({
                 <DevXmlSimulator
                     setMessages={setMessages}
                     onDisplayChart={onDisplayChart}
+                    onShowQuotaToast={() =>
+                        quotaManager.showQuotaLimitToast(50, 50)
+                    }
                 />
             )}