Fix emoji rendering artifacts in terminal

- Activate Unicode 11 in XTerm to prevent double-width overlap
- Remove latin1 fallback that breaks multi-byte UTF-8
- Rely on SSH env configuration for proper locale handling

Fixes #266

src/backend/ssh/terminal.ts

@@ -427,18 +427,7 @@ wss.on("connection", async (ws: WebSocket, req) => {
           sshStream = stream;
 
           stream.on("data", (data: Buffer) => {
-            let decoded = data.toString("utf-8");
-
-            // Defensive fallback: if UTF-8 decode produces replacement characters
-            // and buffer contains high bytes, try latin1 (for legacy servers without UTF-8 locale)
-            if (
-              decoded.includes("\uFFFD") &&
-              data.some((byte) => byte >= 0x80 && byte <= 0xff)
-            ) {
-              decoded = data.toString("latin1");
-            }
-
-            ws.send(JSON.stringify({ type: "data", data: decoded }));
+            ws.send(JSON.stringify({ type: "data", data: data.toString("utf-8") }));
           });
 
           stream.on("close", () => {

src/ui/Desktop/Apps/Terminal/Terminal.tsx

@@ -532,6 +532,10 @@ export const Terminal = forwardRef<any, SSHTerminalProps>(function SSHTerminal(
     terminal.loadAddon(clipboardAddon);
     terminal.loadAddon(unicode11Addon);
     terminal.loadAddon(webLinksAddon);
+
+    // Activate Unicode 11 for proper emoji rendering (prevents double-width artifacts)
+    terminal.unicode.activeVersion = "11";
+
     terminal.open(xtermRef.current);
 
     const element = xtermRef.current;

src/ui/Mobile/Apps/Terminal/Terminal.tsx

@@ -233,6 +233,10 @@ export const Terminal = forwardRef<any, SSHTerminalProps>(function SSHTerminal(
     terminal.loadAddon(clipboardAddon);
     terminal.loadAddon(unicode11Addon);
     terminal.loadAddon(webLinksAddon);
+
+    // Activate Unicode 11 for proper emoji rendering (prevents double-width artifacts)
+    terminal.unicode.activeVersion = "11";
+
     terminal.open(xtermRef.current);
 
     const textarea = xtermRef.current.querySelector(