test(terminal): restore reversal assertion and clarify scrolling guidance (#7)

test/terminal-scroll-routing.test.ts

@@ -694,8 +694,8 @@ describe('pageKeysForGesture, the pure gesture rules both panes share', () => {
     expect(steps.map((s) => s.keys)).toEqual([UP, '', '', UP]);
   });
 
-  it('responds immediately to a notch without paging for every later notch', () => {
-    // Five 4-row notches 400ms apart share the pre-paid page debt.
+  it('accumulates a notch-sized opening event, and carries plain travel across notches', () => {
+    // Five 4-row notches 400 ms apart: each is a new gesture, none pages alone.
     const steps = run([
       [-4, 0],
       [-4, 400],

test/terminal-tile-scroll.test.ts

@@ -660,7 +660,7 @@ describe("gesture handling is the primary pane's, through the shared pure helper
     };
   }
 
-  it('pages a Codex tile, which draws on the alternate screen and ignores SGR wheel reports', async () => {
+  it('pages an untracked Codex tile through the hollow-pane fallback', async () => {
     const { ws, mount } = await connectTile(makeApp({ 's-tile': { mode: 'codex' } }), { mode: 'codex' });
 
     mount.fire('wheel', wheelLines(-18));
@@ -765,6 +765,7 @@ describe("gesture handling is the primary pane's, through the shared pure helper
     primary._flushWheelSgrQueue();
 
     expect(tileBytes).toContain(PAGE_UP);
+    expect(tileBytes).toContain(PAGE_DOWN);
     expect(tileBytes).toBe(sent.join(''));
   });
 
@@ -792,7 +793,7 @@ describe("gesture handling is the primary pane's, through the shared pure helper
     const tileBytes = flushed(ws)
       .map((f) => f.d)
       .join('');
-    // One page for the slow ticks, one for the wobble's opening event, nothing more.
+    // One page for the slow ticks; the wobble cancels its unsent opening page on reversal.
     expect(tileBytes).toBe(PAGE_UP); // the first slow tick flushed before the later wobble
 
     const primary = makeApp({ other: { mode: 'codex' } }, 'other') as App & {

test/terminal-touch-tap.test.ts

@@ -853,7 +853,7 @@ describe('terminal touch tap mouse guard', () => {
     expect(app._wheelScrollLinesFloat({ shiftKey: true, deltaX: -5, deltaY: 0 })).toBe(-0.2);
   });
 
-  it('wheel: encodes SGR 64/65 ticks, caps per event, and coalesces into one flush', () => {
+  it('wheel: encodes SGR 64/65 ticks, caps per event, and sends the first report before batching the rest', () => {
     const { app } = loadTerminalUiHarness();
     const sent: Array<{ id: string; data: string }> = [];
     app.activeSessionId = 'sess-1';