Fix: Decode geographic location as UTF-8 across client and server

Geographic location (city, country) from the geo APIs is UTF-8, but the client
and several server paths converted or stored it in the system ANSI code page,
turning umlauts ("ö"/"ä") into "?" or GBK mojibake ("B枚blingen"). Keep the
value UTF-8 end to end: the client caches it as UTF-8 and re-queries once after
an upgrade (keyed by __DATE__, the app's version convention), while the server
stores and displays it as UTF-8 in the online list, the activity log, the
client-info export, JSON/email payloads and search.

Also add a confirmation prompt before opening a remote chat from the toolbar,
with German, English and Traditional-Chinese translations.

Co-Authored-By: deepseek-v4-pro

server/2015Remote/CClientListDlg.cpp

@@ -94,10 +94,10 @@ static CString GetFieldValue(const ClientValue& val, GroupField field)
     }
 }
 
-// 客户端自报的程序路径是 UTF-8（见 client/LoginServer.cpp 的 RES_FILE_PATH），
+// 程序路径与地理位置均以 UTF-8 存储（见 AddList / client 的 RES_FILE_PATH、RES_CLIENT_LOC），
 // 这里用 LVM_SETITEMTEXTW 直接写宽字符串，绕开 ANSI→CP_ACP 回转，
-// 即使服务端运行在非中文 ACP（如德语）上，中文路径也能正常显示（与窗口/进程管理同法）。
-static void SetProgramPathText(CListCtrl& list, int iItem, int iSubItem, const char* sz)
+// 即使服务端运行在非中文 ACP（如德语）上，中文/带变音符的文本也能正常显示（与窗口/进程管理同法）。
+static void SetUtf8ItemText(CListCtrl& list, int iItem, int iSubItem, const char* sz)
 {
     std::wstring w;
     if (sz && sz[0]) {
@@ -316,12 +316,12 @@ void CClientListDlg::DisplayClients()
             m_ClientList.SetItemText(nItem, COL_ID, strID);
             m_ClientList.SetItemText(nItem, COL_NOTE, val.Note);
             m_ClientList.SetItemText(nItem, COL_COMPUTER_NAME, CString(val.ComputerName));
-            m_ClientList.SetItemText(nItem, COL_LOCATION, val.Location);
+            SetUtf8ItemText(m_ClientList, nItem, COL_LOCATION, val.Location);
             m_ClientList.SetItemText(nItem, COL_IP, val.IP);
             m_ClientList.SetItemText(nItem, COL_OS, val.OsName);
             m_ClientList.SetItemText(nItem, COL_INSTALL_TIME, val.InstallTime);
             m_ClientList.SetItemText(nItem, COL_LAST_LOGIN, val.LastLoginTime);
-            SetProgramPathText(m_ClientList, nItem, COL_PROGRAM_PATH, val.ProgramPath);
+            SetUtf8ItemText(m_ClientList, nItem, COL_PROGRAM_PATH, val.ProgramPath);
             m_ClientList.SetItemText(nItem, COL_LEVEL, strLevel);
             m_ClientList.SetItemText(nItem, COL_AUTH, strAuth);
             m_ClientList.SetItemData(nItem, (DWORD_PTR)key);
@@ -368,12 +368,12 @@ void CClientListDlg::DisplayClients()
                     m_ClientList.SetItemText(nItem, COL_ID, strID);
                     m_ClientList.SetItemText(nItem, COL_NOTE, val.Note);
                     m_ClientList.SetItemText(nItem, COL_COMPUTER_NAME, CString(val.ComputerName));
-                    m_ClientList.SetItemText(nItem, COL_LOCATION, val.Location);
+                    SetUtf8ItemText(m_ClientList, nItem, COL_LOCATION, val.Location);
                     m_ClientList.SetItemText(nItem, COL_IP, val.IP);
                     m_ClientList.SetItemText(nItem, COL_OS, val.OsName);
                     m_ClientList.SetItemText(nItem, COL_INSTALL_TIME, val.InstallTime);
                     m_ClientList.SetItemText(nItem, COL_LAST_LOGIN, val.LastLoginTime);
-                    SetProgramPathText(m_ClientList, nItem, COL_PROGRAM_PATH, val.ProgramPath);
+                    SetUtf8ItemText(m_ClientList, nItem, COL_PROGRAM_PATH, val.ProgramPath);
                     m_ClientList.SetItemText(nItem, COL_LEVEL, strLevel);
                     m_ClientList.SetItemText(nItem, COL_AUTH, strAuth);
                     m_ClientList.SetItemData(nItem, (DWORD_PTR)key);