fix(terminal): loading state, focus handling, debug logging

- Initialize loading=true in useTerminalSessions to prevent auto-create
  from firing before initial load completes
- Remove hasAutoCreated ref from TerminalPage (no longer needed)
- Add focus() to TerminalRef, call on tab switch
- Add term.focus() after term.open() in TerminalComponent
- Add console logging for WebSocket send/receive to debug no-i/o
- Revert backend _read_loop retry logic to original break-on-error

apps/web/src/components/terminal.tsx

@@ -37,6 +37,7 @@ export interface TerminalProps {
 
 export interface TerminalRef {
 	fit: () => void;
+	focus: () => void;
 }
 
 const FONT_SIZE_KEY = "terminal-font-size";
@@ -106,6 +107,7 @@ export const TerminalComponent = React.forwardRef<TerminalRef, TerminalProps>(
 			wsRef.current = ws;
 
 			ws.onopen = () => {
+				console.log(`[Terminal ${sessionId ?? "default"}] WebSocket opened`);
 				setStatus("connected");
 				setError(null);
 				reconnectAttemptsRef.current = 0;
@@ -137,6 +139,8 @@ export const TerminalComponent = React.forwardRef<TerminalRef, TerminalProps>(
 				if (!termRef.current) return;
 
 				if (event.data instanceof Blob) {
+					// eslint-disable-next-line no-console
+					console.log(`[Terminal ${sessionId ?? "default"}] received ${(event.data as Blob).size} bytes`);
 					event.data.arrayBuffer().then((buffer) => {
 						const data = new Uint8Array(buffer);
 						termRef.current?.write(data);
@@ -306,6 +310,8 @@ export const TerminalComponent = React.forwardRef<TerminalRef, TerminalProps>(
 
 			// Open xterm first (must happen before fit)
 			term.open(container);
+			term.focus();
+			console.log(`[Terminal ${sessionId ?? "default"}] xterm opened and focused`);
 			const ws = connectWebSocket();
 
 			// Initial fit after layout settles (terminal must be opened first)
@@ -330,6 +336,8 @@ export const TerminalComponent = React.forwardRef<TerminalRef, TerminalProps>(
 
 			// Handle terminal input
 			term.onData((data) => {
+				// eslint-disable-next-line no-console
+				console.log(`[Terminal ${sessionId ?? "default"}] sending:`, JSON.stringify(data));
 				const currentWs = wsRef.current;
 				if (currentWs?.readyState !== WebSocket.OPEN) return;
 
@@ -466,6 +474,9 @@ export const TerminalComponent = React.forwardRef<TerminalRef, TerminalProps>(
 					}
 				}
 			},
+			focus: () => {
+				termRef.current?.focus();
+			},
 		}));
 
 		// Update parent about status changes