chore(chat-sdk): dedupe relevant context so when users push Cmd-L twi… (

TabbyML#2961)

* chore(chat-sdk): dedupe relevant context so when users push Cmd-L twice we won't append the same context twice

* [autofix.ci] apply automated fixes

---------

Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>

ee/tabby-ui/components/chat/chat.tsx

@@ -406,7 +406,7 @@ function ChatRenderer(
   }
 
   const handleAddRelevantContext = useLatest((context: Context) => {
-    setRelevantContext(relevantContext.concat([context]))
+    setRelevantContext(oldValue => appendContextAndDedupe(oldValue, context))
   })
 
   const addRelevantContext = (context: Context) => {
@@ -504,4 +504,25 @@ function ChatRenderer(
   )
 }
 
+function appendContextAndDedupe(
+  ctxList: Context[],
+  newCtx: Context
+): Context[] {
+  if (!ctxList.some(ctx => isContextEqual(ctx, newCtx))) {
+    ctxList.push(newCtx)
+  }
+  return ctxList
+}
+
+function isContextEqual(lhs: Context, rhs: Context): boolean {
+  return (
+    lhs.kind === rhs.kind &&
+    lhs.range.start === rhs.range.start &&
+    lhs.range.end === rhs.range.end &&
+    lhs.filepath === rhs.filepath &&
+    lhs.content === rhs.content &&
+    lhs.git_url === rhs.git_url
+  )
+}
+
 export const Chat = React.forwardRef<ChatRef, ChatProps>(ChatRenderer)