fix(frontend): give text-capture row real CSS

The text row shipped with semantic classnames (`capture-text-inputs`,
`capture-text-title`, `capture-text-body`, `capture-text-mime`,
`capture-text-icon`) but no CSS rules. Falling through to the parent
`.capture-row-main` flex-row (`display: flex; align-items: center`)
meant the title, textarea, and mime-select stacked as intrinsic-width
boxes centered on the tall body, producing a layout where the body
floated to the top-right, the title box appeared BELOW it, and the mime
selector rendered as an unstyled OS dropdown.

Fix:
- `.capture-text-row .capture-row-main` uses `align-items: flex-start`
  so the leading icon and trailing × pin to the top of the block.
- `.capture-text-inputs` is now a full-width column-flex container with
  proper gaps.
- `.capture-text-title` reuses the 44px input height and typography of
  `.capture-input`; `.capture-text-body` gets a 140px min-height,
  vertical resize, and matching border/focus treatment.
- `.capture-text-mime` is styled as a small chip with a custom caret
  so it matches `.capture-quality` and stops looking like a raw
  `<select>`. Sits in a right-aligned footer under the body.
- `.capture-text-icon` gets a 44px column so it aligns with the title
  input; remove button gets a small top-margin for the same reason.

Rebuilt static bundle bumped as well (`index-BLxoi9rt.css`,
`index-CQcpPA_I.js`).

crates/archivr-server/static/index.html

@@ -6,8 +6,8 @@
     <title>Archivr</title>
     <link rel="icon" type="image/svg+xml" href="/favicon.svg">
     <link rel="icon" type="image/x-icon" href="/favicon.ico">
-    <script type="module" crossorigin src="/assets/index-CthL4K20.js"></script>
-    <link rel="stylesheet" crossorigin href="/assets/index-DicH9MNh.css">
+    <script type="module" crossorigin src="/assets/index-CQcpPA_I.js"></script>
+    <link rel="stylesheet" crossorigin href="/assets/index-BLxoi9rt.css">
   </head>
   <body>
     <div id="root"></div>