实现单篇和多篇论文的对比总结

addon/locale/en-US/addon.ftl

@@ -21,4 +21,26 @@ chat-cleared = Chat cleared
 chat-no-reply = No AI reply to save yet
 chat-note-saved = Saved as note
 chat-selection-added = Selection added to next message
-chat-selection-empty = No text selected in the reader
+chat-selection-empty = No text selected. Select text in the PDF first, then click this button (do not click elsewhere in between).
+chat-copy = Copy
+chat-copied = Copied to clipboard
+chat-empty-title = Start a conversation
+chat-empty-desc = Summarize this paper or ask a question about methods, results, and limitations.
+
+itemmenu-chat = ChatPapers: Open chat
+itemmenu-compare = ChatPapers: Compare papers
+
+multi-title = Multi-paper chat
+multi-empty-title = Read papers together
+multi-empty-desc = Enter a research topic and click Topic review for writing-ready notes; or compare, summarize each, or ask freely.
+multi-placeholder = Enter a topic or question, e.g. Diffusion models for medical image segmentation
+multi-topic-review = Topic review
+multi-need-topic = Enter a research topic in the box, then click Topic review
+multi-compare = Compare
+multi-summary-each = Summarize each
+multi-common = Common themes
+multi-close = Close
+multi-no-items = Please select items first
+multi-need-two = Select at least 2 items to compare
+multi-too-many = { $count } items selected; using the first 8
+multi-ready = { $count } papers ready for topic review

addon/locale/en-US/mainWindow.ftl

@@ -1 +1,3 @@
 itemmenu-label = ChatPapers: Summarize
+itemmenu-chat = ChatPapers: Open chat
+itemmenu-compare = ChatPapers: Compare papers