fix: improve terminal cursor positioning for mobile keyboard events

Fixes issues where:
  - Cursor or terminal area would be half-visible or cut off during virtual keyboard open/close
  - Terminal content would jump unexpectedly when focusing on mobile devices
  - Cursor position was lost when keyboard resized the terminal viewport

Author: bajrangCoder

src/components/terminal/terminal.js

@@ -128,7 +128,7 @@ export default class TerminalComponent {
 		let lastKnownScrollPosition = 0;
 		let isResizing = false;
 		let resizeCount = 0;
-		const RESIZE_DEBOUNCE = 150;
+		const RESIZE_DEBOUNCE = 100;
 		const MAX_RAPID_RESIZES = 3;
 
 		// Store original dimensions for comparison
@@ -170,8 +170,28 @@ export default class TerminalComponent {
 						await this.resizeTerminal(size.cols, size.rows);
 					}
 
-					// Preserve scroll position for content-heavy terminals
-					this.preserveViewportPosition(lastKnownScrollPosition);
+					// Handle keyboard resize cursor positioning
+					const heightRatio = size.rows / originalRows;
+					if (heightRatio < 0.75 && this.terminal.buffer && this.terminal.buffer.active) {
+						// Keyboard resize detected - ensure cursor is visible
+						const buffer = this.terminal.buffer.active;
+						const cursorY = buffer.cursorY;
+						const cursorViewportPos = buffer.baseY + cursorY;
+						const viewportTop = buffer.viewportY;
+						const viewportBottom = viewportTop + this.terminal.rows - 1;
+						
+						if (cursorViewportPos <= viewportTop + 1 || cursorViewportPos >= viewportBottom - 1) {
+							const targetScroll = Math.max(0,
+								Math.min(buffer.length - this.terminal.rows,
+									cursorViewportPos - Math.floor(this.terminal.rows * 0.25)
+								)
+							);
+							this.terminal.scrollToLine(targetScroll);
+						}
+					} else {
+						// Regular resize - preserve scroll position
+						this.preserveViewportPosition(lastKnownScrollPosition);
+					}
 
 					// Update stored dimensions
 					originalRows = size.rows;
@@ -674,6 +694,28 @@ export default class TerminalComponent {
 	 * Focus terminal
 	 */
 	focus() {
+		// Ensure cursor is visible before focusing to prevent half-visibility
+		if (this.terminal.buffer && this.terminal.buffer.active) {
+			const buffer = this.terminal.buffer.active;
+			const cursorY = buffer.cursorY;
+			const cursorViewportPos = buffer.baseY + cursorY;
+			const viewportTop = buffer.viewportY;
+			const viewportBottom = viewportTop + this.terminal.rows - 1;
+			
+			// Check if cursor is fully visible (with margin to prevent half-visibility)
+			const isCursorFullyVisible = cursorViewportPos >= viewportTop + 1 && cursorViewportPos <= viewportBottom - 2;
+
+			// If cursor is not fully visible, scroll to make it properly visible
+			if (!isCursorFullyVisible && buffer.length > this.terminal.rows) {
+				const targetScroll = Math.max(0, 
+					Math.min(buffer.length - this.terminal.rows,
+						cursorViewportPos - Math.floor(this.terminal.rows * 0.25)
+					)
+				);
+				this.terminal.scrollToLine(targetScroll);
+			}
+		}
+
 		this.terminal.focus();
 	}