feat: add pin/unpin functionality to chat history

Adds pin/unpin functionality to the chat history sidebar, allowing users to keep important conversations readily accessible. This improves user experience and helps organize past interactions.

This feature includes:
- Pin/unpin buttons in the chat history sidebar.
- Updated database schema to include `is_pinned` field for chat history items.
- Localized translations for pin/unpin actions.
- Updated UI to display pinned items at the top of the list.

src/db/index.ts

@@ -8,6 +8,7 @@ type HistoryInfo = {
   title: string
   is_rag: boolean
   message_source?: "copilot" | "web-ui"
+  is_pinned?: boolean
   createdAt: number
 }
 
@@ -232,7 +233,11 @@ export const generateID = () => {
   })
 }
 
-export const saveHistory = async (title: string, is_rag?: boolean, message_source?: "copilot" | "web-ui") => {
+export const saveHistory = async (
+  title: string,
+  is_rag?: boolean,
+  message_source?: "copilot" | "web-ui"
+) => {
   const id = generateID()
   const createdAt = Date.now()
   const history = { id, title, createdAt, is_rag, message_source }
@@ -317,6 +322,18 @@ export const updateHistory = async (id: string, title: string) => {
   db.db.set({ chatHistories: newChatHistories })
 }
 
+export const pinHistory = async (id: string, is_pinned: boolean) => {
+  const db = new PageAssitDatabase()
+  const chatHistories = await db.getChatHistories()
+  const newChatHistories = chatHistories.map((history) => {
+    if (history.id === id) {
+      history.is_pinned = is_pinned
+    }
+    return history
+  })
+  db.db.set({ chatHistories: newChatHistories })
+}
+
 export const removeMessageUsingHistoryId = async (history_id: string) => {
   const db = new PageAssitDatabase()
   const chatHistory = await db.getChatHistory(history_id)
@@ -490,9 +507,8 @@ export const getRecentChatFromCopilot = async () => {
   return { history, messages }
 }
 
-
 export const getTitleById = async (id: string) => {
   const db = new PageAssitDatabase()
   const title = await db.getChatHistoryTitleById(id)
   return title
-}
+}