fix: increase tree glyph stroke weight

site/tests/browser/landing.spec.ts

@@ -219,8 +219,8 @@ test('trunk thickness and origin stay proportional to the slash throughout scali
     await page.clock.runFor(time - previousTime);
     const ink = await trunkGeometry(page);
     expect(ink.opacity).toBeGreaterThan(0);
-    // At rest: the Lyth Mono filled stem is 1.064px, slash ink is 21px.
-    expect(ink.stemWidth).toBeCloseTo(1.064, 5);
+    // At rest: tree ink is weighted 25% above the font's native 1.064px stem.
+    expect(ink.stemWidth).toBeCloseTo(1.33, 5);
     expect(ink.width / ink.slashHeight).toBeCloseTo(ink.stemWidth / 21, 5);
     // The foot is at x=12 within ink bounds x=7…41, not their centre.
     expect(ink.anchorX).toBeCloseTo(5 / 34, 5);
@@ -601,7 +601,7 @@ test.describe('JavaScript-free glyph tree', () => {
     await expect(page.locator('.branch-prefix svg')).toHaveCount(8);
     expect(await page.locator('.branch-prefix').evaluateAll((prefixes) => prefixes.every((prefix) => !prefix.textContent!.trim()))).toBe(true);
     const trunk = await trunkGeometry(page);
-    expect(trunk.width).toBeCloseTo(1.064, 5);
+    expect(trunk.width).toBeCloseTo(1.33, 5);
     expect(trunk.length).toBeGreaterThan(0);
     expect(Math.abs(trunk.axis)).toBeLessThan(.1);
     expect(trunk.gapRatio).toBeCloseTo(1 / 14, 5);