Update devcontainer configuration and enhance terminal handling in InkApp. Change base image to 'devpit:latest' and implement a blinking cursor feature in the terminal display, improving user experience and visual feedback during input.

src/terminalService.js

@@ -35,19 +35,24 @@ class TerminalService extends EventEmitter {
         });
 
         this.ptyProcess.onData((data) => {
-            // Normalize line endings
-            const normalized = String(data).replace(/\r\n/g, '\n').replace(/\r/g, '\n');
-            const parts = normalized.split('\n');
-
-            // First part joins the existing partial
-            if (parts.length > 0) {
-                this.partial += parts[0];
-            }
-
-            // For each subsequent part before the last, we have completed lines
-            for (let i = 1; i < parts.length; i += 1) {
-                this.lines.push(this.partial);
-                this.partial = parts[i];
+            const str = String(data);
+            for (let i = 0; i < str.length; i += 1) {
+                const ch = str[i];
+                if (ch === '\\n') {
+                    // Line feed completes the current line
+                    this.lines.push(this.partial);
+                    this.partial = '';
+                } else if (ch === '\\r') {
+                    // Carriage return: move to start of line; start overwriting
+                    this.partial = '';
+                } else if (ch === '\\b' || ch === '\\x7f') {
+                    // Backspace or DEL: remove last char if present
+                    if (this.partial.length > 0) {
+                        this.partial = this.partial.slice(0, -1);
+                    }
+                } else {
+                    this.partial += ch;
+                }
             }
 
             // Enforce max lines buffer