fix(views): wrap My Files table for mobile horizontal scroll

The table at /files was wider than the viewport on iPhone-class widths
(~375 px) — the rightmost column with the Copy and Delete buttons clipped
off-screen with no scroll affordance. Wrapping the table in a
.table-wrap div with overflow-x: auto lets the table scroll within
itself; moving the outer border to the wrapper preserves the desktop
visual unchanged.

- public/style.css: add .table-wrap rule, move border off table, add
  min-width: 100% so the table still fills wide viewports.
- src/views/file-list.ts: wrap <table> in <div class="table-wrap">.
- tests/integration/pages.test.ts: assert rendered HTML contains
  class="table-wrap".

public/style.css

@@ -309,10 +309,16 @@ h1 + p {
   font-size: 12px;
 }
 
+.table-wrap {
+  overflow-x: auto;
+  -webkit-overflow-scrolling: touch;
+  border: var(--border);
+}
+
 table {
   width: 100%;
+  min-width: 100%;
   border-collapse: collapse;
-  border: var(--border);
 }
 
 th {

src/views/file-list.ts

@@ -24,6 +24,7 @@ export function fileListPage(files: FileRow[], baseUrl: string): string {
   return layout('My files', `
     <h1>My files</h1>
     <p><a href="/upload">Upload new file</a></p>
+    <div class="table-wrap">
       <table>
         <thead>
           <tr>
@@ -32,6 +33,7 @@ export function fileListPage(files: FileRow[], baseUrl: string): string {
         </thead>
         <tbody>${rows}</tbody>
       </table>
+    </div>
   `, { authed: true });
 }
 

tests/integration/pages.test.ts

@@ -223,6 +223,7 @@ describe('GET /files — copy link', () => {
     const res = await ctx.app.inject({ method: 'GET', url: '/files', cookies: { token } });
     expect(res.statusCode).toBe(200);
     expect(res.body).toContain('Copy link');
+    expect(res.body).toContain('class="table-wrap"');
   });
 });