fix(m4): drop stale tick-nudge hint from tape page (#99)

frontend/src/capture/AxisPanel.svelte

@@ -327,7 +327,7 @@
     <span class="val">{Math.round(transform.zoom * 100)}%</span>
   </div>
   <button type="button" class="ghost fit" on:click={fit}>Fit</button>
-  <p class="nudge">Wheel or pinch zooms the slab. Arrow keys tilt; up and down nudge the last tick. Shift is a fine step. Double-tap the slab to fit.</p>
+  <p class="nudge">Wheel or pinch zooms the slab, drag pans it, and the handle tilts it. Arrow keys tilt; Shift is a fine step. Double-tap the slab to fit.</p>
 
   <p class="ctl">Crop fill</p>
   <div class="row">

frontend/tests/e2e/tape-fixed-line.spec.ts

@@ -58,8 +58,9 @@ test.describe('#99 fixed tape line', () => {
     expect(fs.existsSync(FACE_A), 'fixture face-a').toBeTruthy();
     await toLengthPage(page);
 
-    // The hint must never tell the owner to drag the ticks.
+    // The hint must never tell the owner to drag or nudge the ticks.
     await expect(page.getByText('Drag the ticks')).toHaveCount(0);
+    await expect(page.getByText('nudge the last tick')).toHaveCount(0);
     await expect(page.getByText('The line is fixed in the middle')).toBeVisible();
 
     const stage = page.getByTestId('tape-line');
@@ -110,12 +111,14 @@ test.describe('#99 fixed tape line', () => {
     await toLengthPage(page);
 
     const canvas = page.getByTestId('tape-line').locator('canvas').first();
+    const fill = page.getByLabel('Crop fill percent');
     const before = await canvas.screenshot();
 
-    // Move the crop-fill slider to a different value.
-    const fill = page.getByLabel('Crop fill percent');
+    // Move the crop-fill slider and confirm the control really took the value,
+    // so a no-op fill() can never masquerade as a passing assertion.
     await fill.fill('50');
-    await page.waitForTimeout(500);
+    await expect(fill).toHaveValue('50');
+    await page.waitForTimeout(1200);
 
     const after = await canvas.screenshot();
     expect(Buffer.compare(before, after), 'crop fill must move the line ends').not.toBe(0);