fix(webapp): keep the provenance line on mobile, unclipped in History (BEA-70) (#121)

Below 900px the file view hid the who/when/how-hot line outright
(`#meta { display: none }`) and the History run header ellipsised its
note and author to `claude-…` / `Alice <ali…` — the line the product is
differentiated by, gone exactly on the surface people catch up from.

CSS-only, inside the existing `@media (max-width: 900px)` block:

- `#topbar` wraps (`height: auto; min-height: 52px`) and `#meta` takes its
  own full-width row, left-aligned and wrapping. `order: 1` is what keeps
  Search / Share / ⋯ on row 1 — meta precedes them in the DOM, so a bare
  flex-wrap would drag them down. `#meta:empty` keeps folder, dashboard
  and history routes from gaining a blank strip.
- `.hrun-head` wraps; the note loses its 46% cap and both spans stop
  ellipsising, with `.hrun-meta` on its own line under the note and the
  time still on row 1.

Desktop (≥901px) is untouched — every rule lives inside the breakpoint.

Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>

internal/webapp/frontend/e2e/layout.spec.ts

@@ -111,6 +111,94 @@ test("the gutter belongs to the scroll container, not the column", async ({ page
   }
 });
 
+/* The who/when/how-hot line is what the product is differentiated by, and a
+   phone is exactly when you're catching up — but ≤900px used to `display:
+   none` it on the file view and ellipsise it to `claude-…` / `Alice <ali…` in
+   History. Desktop values are read first and compared, rather than hard-coded:
+   the seeded hub's read counts drift, so a literal would flake. */
+test("provenance survives to a phone on the file view and in History", async ({ page }) => {
+  await login(page);
+  const pid = await wikiId(page);
+  const runHead = page.locator(".hrun-head").first();
+
+  const read = async () => {
+    await page.goto(`/${pid}/index.md`);
+    // Not waitForSelector: #meta is always in the DOM, empty until the file
+    // loads and (before this fix) display:none below 900px.
+    await expect(page.locator("#meta")).not.toBeEmpty();
+    const meta = await page.locator("#meta").textContent();
+    await page.goto(`/${pid}/history`);
+    await page.waitForSelector(".hrun-head");
+    return {
+      meta,
+      note: await runHead.locator(".hrun-note").textContent(),
+      runMeta: await runHead.locator(".hrun-meta").textContent(),
+      time: await runHead.locator(".hrun-time").textContent(),
+    };
+  };
+
+  await page.setViewportSize({ width: 1200, height: 900 });
+  const desktop = await read();
+  expect(desktop.meta, "desktop provenance line").toBeTruthy();
+
+  await page.setViewportSize({ width: 390, height: 844 });
+  await page.goto(`/${pid}/index.md`);
+  await expect(page.locator("#meta")).not.toBeEmpty();
+  await expect(page.locator("#meta"), "390px: provenance line visible").toBeVisible();
+
+  const m = await page.evaluate(() => {
+    const bar = document.querySelector("#topbar") as HTMLElement;
+    const meta = document.querySelector("#meta") as HTMLElement;
+    const btns = [...bar.querySelectorAll<HTMLElement>(".btn, .icon-btn")].filter(
+      (b) => b.getBoundingClientRect().width > 0,
+    );
+    const last = btns[btns.length - 1].getBoundingClientRect();
+    const content = document.querySelector("#content") as HTMLElement;
+    return {
+      // Actions stay flush right on row 1, above the wrapped meta row.
+      gapFromRight: Math.round(bar.getBoundingClientRect().right - last.right),
+      actionsAboveMeta: last.bottom <= meta.getBoundingClientRect().top + 1,
+      tap: Math.min(...btns.map((b) => b.getBoundingClientRect().height)),
+      // Nothing clipped, and the grown topbar pushes content down rather
+      // than overlapping it.
+      clipped: meta.scrollWidth > meta.clientWidth + 1 || meta.scrollHeight > meta.clientHeight + 1,
+      contentBelow: content.getBoundingClientRect().top >= bar.getBoundingClientRect().bottom - 1,
+      overflow: document.documentElement.scrollWidth > document.documentElement.clientWidth,
+    };
+  });
+  expect(m.gapFromRight, "390px: actions flush right").toBeLessThanOrEqual(10);
+  expect(m.actionsAboveMeta, "390px: actions stayed on the first row").toBe(true);
+  expect(m.tap, "390px: action tap target").toBeGreaterThanOrEqual(44);
+  expect(m.clipped, "390px: provenance line clipped").toBe(false);
+  expect(m.contentBelow, "390px: topbar overlaps the page").toBe(true);
+  expect(m.overflow, "390px: horizontal page scroll").toBe(false);
+
+  const mobile = await read();
+  expect(mobile, "390px: same provenance as desktop").toEqual(desktop);
+
+  const clip = await page.evaluate(() => {
+    const head = document.querySelector(".hrun-head") as HTMLElement;
+    const bad = (sel: string) => {
+      const el = head.querySelector(sel) as HTMLElement;
+      return el.scrollWidth > el.clientWidth + 1;
+    };
+    return { note: bad(".hrun-note"), meta: bad(".hrun-meta") };
+  });
+  expect(clip.note, "390px: run note clipped").toBe(false);
+  expect(clip.meta, "390px: run meta clipped").toBe(false);
+
+  // Routes with no provenance must not gain a blank strip: the topbar is
+  // exactly its desktop height there.
+  await page.goto(`/${pid}/notes`);
+  await page.waitForSelector(".dl-row");
+  const folder = await page.evaluate(() => ({
+    metaShown: getComputedStyle(document.querySelector("#meta") as HTMLElement).display !== "none",
+    barHeight: Math.round((document.querySelector("#topbar") as HTMLElement).getBoundingClientRect().height),
+  }));
+  expect(folder.metaShown, "390px: empty meta on a folder route").toBe(false);
+  expect(folder.barHeight, "390px: folder topbar height").toBe(52);
+});
+
 /* Mobile folder rows used to drop .dl-meta entirely below 430px, leaving an
    unlabelled coloured dot as the only signal — and the dot's meaning lived in
    a title= that touch never shows and screen readers never read. The meta now

internal/webapp/frontend/src/style.css

@@ -882,10 +882,19 @@ a.ai-main:hover { color: var(--accent); }
   #topbar .btn .ico { width: 18px; height: 18px; }
   #more-btn:not([hidden]) { display: inline-flex; }
   #history-btn, #upload-btn, #download { display: none !important; }
-  /* Desktop right-aligns the actions via #meta's flex:1 — with meta
-     hidden here, the crumb becomes the spacer so Search/Share/⋯ pin to
-     the top-right corner. */
-  #meta { display: none; }
+  /* Who/when/how-hot is the line people catch up from, so it survives to a
+     phone on its own row instead of being hidden. `order: 1` is load-bearing:
+     meta sits before the actions in the DOM, so a bare flex-wrap would drag
+     Search/Share/⋯ down with it. The crumb keeps flex:1 and stays the spacer
+     that pins them to the top-right corner. */
+  #topbar { flex-wrap: wrap; height: auto; min-height: 52px; }
+  #meta {
+    order: 1; flex: 1 1 100%; text-align: left;
+    white-space: normal; overflow: visible; padding: 0 0 8px;
+  }
+  /* Folder, dashboard and history routes carry no meta — without this they
+     gain a blank strip under the crumb. */
+  #meta:empty { display: none; }
   #crumb { flex: 1; }
   #vault { padding: 0 8px 0 12px; }
   .icon-btn2, #signout,   #tree .row, #projects .row { height: 44px; }
@@ -904,6 +913,13 @@ a.ai-main:hover { color: var(--accent); }
   .hf-search input, .hf-user, .hf-date, .hf-clear { height: 44px; }
   .hf-dates { flex: 1 1 100%; }
   .hf-date { flex: 1; width: auto; min-width: 0; }
+  /* The desktop run header ellipsises the note at 46% and the meta at
+     whatever is left, which on a phone clips to `claude-…` / `Alice <ali…` —
+     the two fields the row exists to carry. Let it wrap instead; `order: 1`
+     drops the meta below the note while the time stays on the first row. */
+  .hrun-head { flex-wrap: wrap; row-gap: 4px; }
+  .hrun-note { max-width: none; white-space: normal; overflow: visible; }
+  .hrun-meta { order: 1; flex: 1 1 100%; white-space: normal; overflow: visible; }
   .ai-btn, .ai-del { height: auto; min-height: 44px; padding: 0 12px; }
   /* react-table renders rows as `display: table-row`, which makes every
      flex rule above inert and lets the last column (Remove) fall outside

internal/webapp/static/index.html

@@ -5,8 +5,8 @@
 <meta name="viewport" content="width=device-width, initial-scale=1">
 <title>BearDrive</title>
 <link rel="icon" href="data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 32 32' fill='%23f5a623'><rect x='4' y='4' width='5.6' height='24'/><rect x='11.2' y='4' width='14.4' height='11.2'/><rect x='11.2' y='16.8' width='16.8' height='11.2'/></svg>">
-  <script type="module" crossorigin src="/assets/index-Cw2mk7qH.js"></script>
-  <link rel="stylesheet" crossorigin href="/assets/index-Cb0dESCp.css">
+  <script type="module" crossorigin src="/assets/index-C_yRHCCD.js"></script>
+  <link rel="stylesheet" crossorigin href="/assets/index-C52IQv2y.css">
 </head>
 <body>
 <div id="root"></div>