debug: add WebSocket stability delay and enhanced checks

- Added 100ms delay before sending command to ensure WebSocket stability
- Added detailed WebSocket state logging (CONNECTING, OPEN, CLOSING, CLOSED)
- Added bufferedAmount check to wait for pending sends
- Wrapped ws.send() in try-catch for better error reporting
- Split terminal and ws existence checks for clearer debugging

public/claude-ide/terminal.js

@@ -699,28 +699,55 @@ class TerminalManager {
       return;
     }
 
-    this.debugLog('CMD', `Terminal ${terminalId} is ready! Sending command.`);
+    this.debugLog('CMD', `Terminal ${terminalId} is ready!`);
+
+    // Small delay to ensure WebSocket is stable after switching terminals
+    this.debugLog('CMD', `Waiting 100ms for WebSocket to stabilize...`);
+    await new Promise(resolve => setTimeout(resolve, 100));
 
     const terminal = this.terminals.get(terminalId);
-    if (!terminal || !terminal.ws || terminal.ws.readyState !== WebSocket.OPEN) {
-      this.debugLog('ERROR', `Cannot send - WebSocket not ready`, {
-        hasTerminal: !!terminal,
-        hasWs: !!terminal?.ws,
-        wsState: terminal?.ws?.readyState,
-        stateName: terminal?.ws?.readyState === WebSocket.OPEN ? 'OPEN' : 'NOT OPEN'
+    if (!terminal) {
+      this.debugLog('ERROR', `Terminal ${terminalId} not found in map`);
+      return;
+    }
+
+    if (!terminal.ws) {
+      this.debugLog('ERROR', `WebSocket not set for terminal ${terminalId}`);
+      return;
+    }
+
+    // Check WebSocket state
+    const readyStates = ['CONNECTING', 'OPEN', 'CLOSING', 'CLOSED'];
+    this.debugLog('CMD', `WebSocket state: ${readyStates[terminal.ws.readyState]} (${terminal.ws.readyState})`);
+
+    if (terminal.ws.readyState !== WebSocket.OPEN) {
+      this.debugLog('ERROR', `Cannot send - WebSocket not open`, {
+        wsState: terminal.ws.readyState,
+        stateName: readyStates[terminal.ws.readyState]
       });
       return;
     }
 
+    // Check if WebSocket has any buffered amount (indicating pending sends)
+    if (terminal.ws.bufferedAmount > 0) {
+      this.debugLog('CMD', `WebSocket has ${terminal.ws.bufferedAmount} bytes buffered, waiting...`);
+      await new Promise(resolve => setTimeout(resolve, 200));
+    }
+
     // Send command to terminal
     const message = JSON.stringify({
       type: 'input',
       data: command
     });
     this.debugLog('CMD', `Sending to WebSocket: ${message}`);
-    terminal.ws.send(message);
 
-    this.debugLog('CMD', `Command sent to terminal ${terminalId}: ${command.trim()}`);
+    try {
+      terminal.ws.send(message);
+      this.debugLog('CMD', `Command sent to terminal ${terminalId}: ${command.trim()}`);
+    } catch (error) {
+      this.debugLog('ERROR', `Failed to send command`, { error: error.message, name: error.name });
+      showToast(`Failed to send command: ${error.message}`, 'error');
+    }
   }
 
   /**