fix(tui): cap portrait image render height

packages/tui/test/terminal-image.test.ts

@@ -312,6 +312,40 @@ describe("Kitty image cursor movement", () => {
 		}
 	});
 
+	it("honors maxHeightCells by reducing rendered width", () => {
+		setCapabilities({ images: "kitty", trueColor: true, hyperlinks: true });
+		setCellDimensions({ widthPx: 10, heightPx: 10 });
+		try {
+			const result = renderImage("AAAA", { widthPx: 10, heightPx: 100 }, { maxWidthCells: 10, maxHeightCells: 5 });
+			assert.ok(result);
+			assert.strictEqual(result.rows, 5);
+			assert.ok(result.sequence.includes(",c=1,r=5"));
+		} finally {
+			resetCapabilitiesCache();
+			setCellDimensions({ widthPx: 9, heightPx: 18 });
+		}
+	});
+
+	it("caps Image component height to a square pixel box by default", () => {
+		setCapabilities({ images: "kitty", trueColor: true, hyperlinks: true });
+		setCellDimensions({ widthPx: 10, heightPx: 20 });
+		try {
+			const image = new Image(
+				"AAAA",
+				"image/png",
+				{ fallbackColor: (value) => value },
+				{ maxWidthCells: 10 },
+				{ widthPx: 10, heightPx: 100 },
+			);
+			const lines = image.render(12);
+			assert.strictEqual(lines.length, 5);
+			assert.ok(lines[0].includes(",c=1,r=5"));
+		} finally {
+			resetCapabilitiesCache();
+			setCellDimensions({ widthPx: 9, heightPx: 18 });
+		}
+	});
+
 	it("places image sequence on first line with empty padding rows", () => {
 		setCapabilities({ images: "kitty", trueColor: true, hyperlinks: true });
 		setCellDimensions({ widthPx: 10, heightPx: 10 });