fix(story-mode): the magnifier no longer hides the terminal lines it is held over

On a narrow panel (a phone, a two-column page) Claude holds the lens over
the investigate terminal, and its rim covered the end of the second line
and the ones below it. Those lines now end with an ellipsis short of the
lens's reach (over every frame of its sway); the lines above and below
it keep the terminal's full width, and on a wide panel, where the lens
hangs beside the terminal, nothing changes. A narrower terminal was the
other option and cut every line to about 14 characters on a phone.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

test/story-mode-ui.test.ts

@@ -1396,3 +1396,33 @@ describe('story-mode.js speech balloons', () => {
     expect(16 + parseFloat(rt.balloon.style.maxWidth)).toBeLessThanOrEqual(face.x0 - 8);
   });
 });
+
+describe('story-mode.js magnifier', () => {
+  it('terminal lines the magnifier is held over end short of it, the others keep their width', async () => {
+    const look = (id: string, desc: string) => bash(id, `ls -la ${id}`, desc, '');
+    boot(
+      storyOf([
+        prompt('Look around please'),
+        ...look('b1', 'Inspect project folder, git state and the remotes'),
+        ...look('b2', 'List src and config contents of the whole repository'),
+        end(4000),
+      ])
+    );
+    app.openStoryMode(SID);
+    await settle();
+    const rt = app._story.panels.find((p: { kind: string }) => p.kind === 'investigate');
+    expect(rt.panel.files ?? []).toEqual([]);
+    // A narrow panel: the stage is 300 / (270 / 260) = 289 units wide, Claude at 231, the lens's rim
+    // at 231 - 119 at most, the terminal 168 units wide from 14.
+    Object.assign(rt, { w: 300, h: 270, dpr: 1, bgKey: '', clock: 72 }); // the finished frame (HERO)
+    drawnTexts.length = 0;
+    app._storyDrawPanel(rt);
+    const lines = drawnTexts.filter((t) => t.startsWith('› '));
+    expect(lines).toHaveLength(2);
+    // The fake context measures 6 units a character: the first line uses the terminal's width (above
+    // the lens), the second ends with an ellipsis before the rim (231 - 122 - 14 - 13 = 82 units).
+    expect(lines[0].length * 6).toBeGreaterThan(120);
+    expect(lines[1].endsWith('…')).toBe(true);
+    expect(lines[1].length * 6).toBeLessThanOrEqual(82);
+  });
+});