Pick the site icon from the library and crop it, find legal pages by search, list newest first

- The site icon is no longer a select at the end of the company data. It has
  its own section: a button opens the media library (upload included), then
  a square is dragged, resized by its corner, a slider or +/-, and previewed
  at 180 and 32 px. The crop is stored as fractions (faviconCrop) and the
  PNGs are cut from it; faviconVersion changes the link so browsers pick up
  a new cut. Icons without a crop keep their old link.
- openMedia() takes needsAlt: false, since the icon never appears as
  content. The dialog styles moved from editor.css to media-dialog.css so
  the dialog works outside the editor.
- Privacy page and imprint are chosen with the content search, like the 404
  page. The picker can store the path instead of the id (valueKey/data-value).
- The page and post lists in the administration sort newest first; the
  subpage indentation is gone there, as it would point at the wrong parent.

Tests: 581 PHPUnit, 35 node, test:editor green (the consent step now picks
the privacy page by search). test:admin --admin-only fails only at the known
nested-interactive menu summaries.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

public/assets/media-dialog.css

@@ -0,0 +1,30 @@
+/* The media library dialog. Loaded by the editor and by every screen that picks an image from
+   the library (the site icon in the settings), so it does not rely on editor.css. */
+.media-dialog{padding:28px;background:var(--paper);border:1px solid var(--line);border-radius:12px;color:var(--ink);box-shadow:0 20px 80px #1b2a2433}
+.media-dialog::backdrop{background:#172e2966}
+.media-dialog p{font-size:14px;line-height:1.7;color:var(--muted)}
+.media-dialog .panel-hint{font-size:11px;color:var(--muted);line-height:1.6;margin:0 0 12px}
+.media-launch{margin-top:14px;white-space:normal}
+.media-dialog{width:calc(100% - 32px);max-width:1100px;max-height:calc(100dvh - 32px);overflow:auto}
+.media-heading{display:flex;justify-content:space-between;gap:20px;align-items:center}
+.media-heading h2{margin:0}
+.media-heading .eyebrow{margin-bottom:8px}
+.media-tools{display:grid;grid-template-columns:1fr 1fr;gap:24px}
+.media-tools label{margin-top:10px}
+.media-layout{display:grid;grid-template-columns:minmax(0,1fr) 270px;gap:24px}
+.media-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(145px,1fr));gap:12px;align-content:start;max-height:430px;overflow:auto;padding:4px}
+.media-card{border:2px solid var(--line);border-radius:9px;padding:7px;background:white;color:var(--ink);display:flex;flex-direction:column;gap:7px;text-align:left;min-width:0}
+.media-card[aria-pressed=true]{border-color:var(--accent);background:#edf4dc}
+.media-card img{width:100%;height:115px;object-fit:cover;border-radius:5px}
+.media-card strong{font-size:12px;overflow-wrap:anywhere}
+.media-card span{font-size:11px;color:var(--muted)}
+.media-details{padding-left:22px;border-left:1px solid var(--line)}
+.media-details button,.media-details a{margin-top:12px;display:block}
+.media-details input{font-size:13px}
+.media-footer{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-top:20px;border-top:1px solid var(--line);padding-top:15px}
+.media-footer label{margin:0;font-size:12px}
+#media-error{color:#8b2f22;background:#fff0eb;padding:12px;border-radius:6px}
+#media-status{font-size:12px;margin-block:15px}
+.media-dialog> .panel-hint{margin-top:20px}
+.media-details>p{font-size:12px}
+@media(max-width:767px){.media-dialog{padding:18px}.media-tools,.media-layout{grid-template-columns:1fr}.media-details{padding:20px 0 0;border-left:0;border-top:1px solid var(--line)}.media-grid{max-height:280px;grid-template-columns:repeat(2,minmax(0,1fr))}.media-footer{align-items:stretch;flex-direction:column}.media-heading{gap:8px}}