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/admin.css

@@ -751,9 +751,25 @@ details.card > summary:hover { background: #fafbf8 }
 .install-details > summary { padding: 14px 0; font-size: 13px; font-weight: 600; cursor: pointer }
 .install-details[open] > summary { border-bottom: 1px solid var(--line); margin-bottom: 6px }
 
-.favicon-field{display:flex;align-items:center;gap:12px}
-.favicon-field select{flex:1}
+.favicon-field{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px}
+.favicon-current{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--muted)}
+.favicon-actions{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
 .favicon-preview{border-radius:6px;background:#fff;box-shadow:0 0 0 1px rgba(0,0,0,.12)}
+.favicon-editor{display:grid;grid-template-columns:minmax(0,1fr) 220px;gap:20px;align-items:start;margin-top:14px}
+.favicon-editor[hidden]{display:none}
+.favicon-stage{position:relative;justify-self:start;max-width:100%;line-height:0;background:repeating-conic-gradient(#eef1eb 0% 25%,#fff 0% 50%) 0 0/16px 16px;user-select:none;touch-action:none}
+.favicon-stage img{display:block;max-width:100%;max-height:360px;width:auto;height:auto}
+.favicon-frame{position:absolute;box-sizing:border-box;border:2px solid #fff;outline:1px solid rgba(0,0,0,.6);box-shadow:0 0 0 9999px rgba(20,30,25,.55);cursor:move}
+.favicon-stage{overflow:hidden}
+.favicon-frame:focus-visible{outline:3px solid var(--accent);outline-offset:0}
+.favicon-handle{position:absolute;right:-7px;bottom:-7px;width:14px;height:14px;background:#fff;border:1px solid rgba(0,0,0,.6);border-radius:3px;cursor:nwse-resize}
+.favicon-side input[type=range]{width:100%}
+.favicon-samples{display:flex;align-items:flex-end;gap:16px;margin:12px 0}
+.favicon-samples figure{margin:0;text-align:center;font-size:11px;color:var(--muted)}
+.favicon-samples canvas{display:block;margin:0 auto 6px;border-radius:8px;background:repeating-conic-gradient(#eef1eb 0% 25%,#fff 0% 50%) 0 0/12px 12px;box-shadow:0 0 0 1px rgba(0,0,0,.12)}
+.favicon-sample-large{width:90px;height:90px}
+.favicon-sample-small{width:32px;height:32px;border-radius:4px!important}
+@media(max-width:700px){.favicon-editor{grid-template-columns:1fr}}
 
 .color-field { display: flex; gap: 8px; align-items: center }
 .color-field input[type="text"], .color-field > input:not([type="color"]) { flex: 1; min-width: 0 }