feat: harden local shell, SFTP, and desktop session reliability

Finder-launched terminals now inherit a login PATH so tools like ollama resolve, destructive SFTP/editor actions require confirmation, and terminal search plus window dragging work again. SSH forwards and RDP sessions keep listeners and survive reconnect without FastPath crashes.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/i18n/locales/en/errors.json

@@ -39,7 +39,9 @@
     "closed": "Connection closed",
     "dnsFailed": "Could not resolve host",
     "refused": "Connection refused",
-    "disconnected": "Disconnected"
+    "disconnected": "Disconnected",
+    "keepaliveFailed": "SSH keep-alive failed repeatedly; connection closed",
+    "idleKicked": "Remote shell logged out due to idle timeout (TMOUT)"
   },
   "auth": {
     "failed": "Authentication failed. Check the username and password.",
@@ -68,7 +70,10 @@
   "forward": {
     "failed": "Port forward setup failed",
     "bindFailed": "Failed to bind port",
-    "alreadyInUse": "Port already in use"
+    "alreadyInUse": "Local port is already in use. Stop the running forward (or the other process on that port), then start again.",
+    "remoteDenied": "Remote port forward refused by the server (AllowTcpForwarding / PermitListen, port in use, or bind limits). OpsXShell listens on remote 127.0.0.1 only.",
+    "remoteDeniedPrivileged": "Remote refused a privileged listen port (<1024). Use a port ≥1024, or root on the server, and check AllowTcpForwarding / PermitListen.",
+    "invalidTargetHost": "Target cannot be 0.0.0.0 — use 127.0.0.1 or a reachable internal IP"
   },
   "sftp": {
     "connectFailed": "SFTP connection failed",
@@ -80,7 +85,15 @@
     "writeFailed": "Save failed",
     "renameFailed": "Rename failed",
     "chmodFailed": "Failed to update permissions",
-    "apiUnavailable": "SFTP API unavailable"
+    "apiUnavailable": "SFTP API unavailable",
+    "channelFailed": "Could not open SFTP channel (server limit or busy session). Reconnect and try again",
+    "sessionGone": "SFTP session ended; reconnect to continue",
+    "busy": "A file transfer is in progress. Try again when it finishes.",
+    "editTooLarge": "File is too large for the text editor (max ~2MB). Download it and open locally.",
+    "editBinary": "This file looks binary and cannot be opened in the text editor",
+    "editNotUtf8": "Remote file is not valid UTF-8 text",
+    "transferCancelled": "Transfer cancelled",
+    "diskFull": "Not enough disk space on the remote or local side"
   },
   "session": {
     "notFound": "Session not found",