feat(tui): removed cursor positioning and refactored TUI rendering with explicit env defaults

- Removed getCursorPosition() method from Component interface and implementations, eliminating hardware cursor positioning support.
- Changed PI_HARDWARE_CURSOR environment variable default from implicit true to explicit '1' with fallback pattern.
- Changed PI_CLEAR_ON_SHRINK environment variable default from implicit false to explicit '0' with fallback pattern.
- Added screen clearing on TUI startup to prevent shell prompts from bleeding into first rendered frame.
- Refactored full-render logic into reusable fullRender() helper function.

packages/coding-agent/src/modes/components/diff.ts

@@ -1,5 +1,6 @@
 import * as Diff from "diff";
 import { theme } from "../../modes/theme/theme";
+import { replaceTabs } from "../../tools/render-utils";
 
 /**
  * Parse diff line to extract prefix, line number, and content.
@@ -11,13 +12,6 @@ function parseDiffLine(line: string): { prefix: string; lineNum: string; content
 	return { prefix: match[1], lineNum: match[2] ?? "", content: match[3] };
 }
 
-/**
- * Replace tabs with spaces for consistent rendering.
- */
-function replaceTabs(text: string): string {
-	return text.replace(/\t/g, "   ");
-}
-
 /**
  * Compute word-level diff and render with inverse on changed parts.
  * Uses diffWords which groups whitespace with adjacent words for cleaner highlighting.

packages/coding-agent/src/modes/controllers/selector-controller.ts

@@ -84,7 +84,7 @@ export class SelectorController {
 						},
 						getStatusLinePreview: () => {
 							// Return the rendered status line for inline preview
-							const width = this.ctx.ui.getWidth();
+							const width = this.ctx.ui.terminal.columns;
 							return this.ctx.statusLine.getTopBorder(width).content;
 						},
 						onPluginsChanged: () => {

packages/coding-agent/src/modes/interactive-mode.ts

@@ -17,6 +17,7 @@ import {
 } from "@oh-my-pi/pi-tui";
 import { $env, isEnoent, logger, postmortem } from "@oh-my-pi/pi-utils";
 import chalk from "chalk";
+import { APP_NAME } from "../config";
 import { KeybindingsManager } from "../config/keybindings";
 import { renderPromptTemplate } from "../config/prompt-templates";
 import { type Settings, settings } from "../config/settings";
@@ -391,7 +392,7 @@ export class InteractiveMode implements InteractiveModeContext {
 	}
 
 	updateEditorTopBorder(): void {
-		const width = this.ui.getWidth();
+		const width = this.ui.terminal.columns;
 		const topBorder = this.statusLine.getTopBorder(width);
 		this.editor.setTopBorder(topBorder);
 	}
@@ -726,14 +727,26 @@ export class InteractiveMode implements InteractiveModeContext {
 		await this.session.emitCustomToolSessionEvent("shutdown");
 
 		if (this.isInitialized) {
-			await this.ui.waitForRender();
+			this.ui.requestRender(true);
 		}
 
+		// Wait for any pending renders to complete
+		// requestRender() uses process.nextTick(), so we wait one tick
+		await new Promise(resolve => process.nextTick(resolve));
+
 		// Drain any in-flight Kitty key release events before stopping.
 		// This prevents escape sequences from leaking to the parent shell over slow SSH.
 		await this.ui.terminal.drainInput(1000);
 
 		this.stop();
+
+		// Print resumption hint if this is a persisted session
+		const sessionId = this.sessionManager.getSessionId();
+		const sessionFile = this.sessionManager.getSessionFile();
+		if (sessionId && sessionFile) {
+			process.stderr.write(`\n${chalk.dim(`Resume this session with ${APP_NAME} --resume ${sessionId}`)}\n`);
+		}
+
 		await postmortem.quit(0);
 	}
 

packages/coding-agent/src/modes/utils/ui-helpers.ts

@@ -204,13 +204,6 @@ export class UiHelpers {
 				// Render tool call components
 				for (const content of message.content) {
 					if (content.type !== "toolCall") {
-						// Text/thinking blocks between tool calls break read grouping
-						if (
-							(content.type === "text" && content.text?.trim()) ||
-							(content.type === "thinking" && (content as any).thinking?.trim())
-						) {
-							readGroup = null;
-						}
 						continue;
 					}