fix(install-e2e): force 100% zoom before driving the app

The app ships a 90% UI-zoom default, so a fresh install renders at devicePixelRatio 0.9 and Playwright's input coordinates land ~10% off target on the CI runners: clicks aimed at the titlebar settings gear hit the bar beside it, which read as a phantom overlay interception and failed every app-update leg. Set zoom to 100% through webContents after boot, retrying until dpr reads 1 because the boot path re-applies the default asynchronously.

tests/install/e2e-assets/drive-update.cjs

@@ -117,6 +117,30 @@ async function main() {
   log(`window picked (${app.windows().length} windows, url=${page.url()})`)
   log('first window acquired')
 
+  // The app ships a 90% UI-zoom default, so a fresh install renders at
+  // devicePixelRatio 0.9 and Playwright's input coordinates land ~10% off
+  // target on the CI runners. Force 100% through the same webContents API
+  // the app's zoom control uses. A single set gets reverted (the boot path
+  // re-applies the default asynchronously), so set-verify-retry until dpr
+  // reads 1.
+  try {
+    const before = await page.evaluate(() => window.devicePixelRatio)
+    let after = before
+    for (let i = 0; i < 20; i++) {
+      await app.evaluate(({ BrowserWindow }) => {
+        for (const w of BrowserWindow.getAllWindows()) {
+          w.webContents.setZoomLevel(0)
+        }
+      })
+      await page.waitForTimeout(1000)
+      after = await page.evaluate(() => window.devicePixelRatio)
+      if (Math.abs(after - 1) < 0.001) break
+    }
+    log(`[zoom] forced 100% via webContents.setZoomLevel(0): dpr ${before} -> ${after}`)
+  } catch (e) {
+    log(`[zoom] direct zoom set failed (continuing): ${e.message}`)
+  }
+
   // Boot: wait for the composer to exist — the shell is mounted by then.
   // The real backend (`hermes serve`) is booting underneath; give it time.
   await page.waitForSelector('textarea, [contenteditable="true"]', {

tests/install/e2e-assets/launch-from-spec.mjs

@@ -131,6 +131,30 @@ async function main() {
   log(`window up: ${await window.title()} (${app.windows().length} windows, picked url=${window.url()})`);
   await window.screenshot({ path: `${values.spec}.window.png` }).catch(() => {});
 
+  // The app ships a 90% UI-zoom default, so a fresh install renders at
+  // devicePixelRatio 0.9 and Playwright's input coordinates land ~10% off
+  // target on the CI runners. Force 100% through the same webContents API
+  // the app's zoom control uses. A single set gets reverted (the boot path
+  // re-applies the default asynchronously), so set-verify-retry until dpr
+  // reads 1.
+  try {
+    const before = await window.evaluate(() => window.devicePixelRatio);
+    let after = before;
+    for (let i = 0; i < 20; i++) {
+      await app.evaluate(({ BrowserWindow }) => {
+        for (const w of BrowserWindow.getAllWindows()) {
+          w.webContents.setZoomLevel(0);
+        }
+      });
+      await window.waitForTimeout(1000);
+      after = await window.evaluate(() => window.devicePixelRatio);
+      if (Math.abs(after - 1) < 0.001) break;
+    }
+    log(`[zoom] forced 100% via webContents.setZoomLevel(0): dpr ${before} -> ${after}`);
+  } catch (e) {
+    log(`[zoom] direct zoom set failed (continuing): ${e.message}`);
+  }
+
   if (values['no-update']) {
     log('smoke mode: window proven, closing');
     await app.close().catch(() => {});