Settings presets: real padding (beat Gradio reset) + readable active hover

Gradio's button reset was zeroing the preset buttons' padding, so the text sat
against the edges — restore it with !important (14px 16px), like the other
persona buttons. Also: a selected button turns light on hover, so force its text
to ink (dark) on hover instead of staying light-on-light.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

web/shell/persona.css

@@ -261,12 +261,15 @@
 .tac-quality { display: flex; flex-direction: column; gap: 12px; }
 .tac-preset-row { display: flex; gap: 8px; flex-wrap: wrap; }
 .tac-preset-btn {
-  flex: 1 1 120px; display: flex; flex-direction: column; gap: 3px; text-align: left;
-  background: var(--p-card); border: 1.5px solid var(--p-ink); border-radius: 0;
-  padding: 9px 11px; cursor: pointer; color: var(--p-ink); transition: background .12s;
+  flex: 1 1 120px; display: flex; flex-direction: column; gap: 4px; text-align: left;
+  background: var(--p-card) !important; border: 1.5px solid var(--p-ink) !important; border-radius: 0 !important;
+  padding: 14px 16px !important; cursor: pointer; color: var(--p-ink) !important; transition: background .12s, color .12s;
+  height: auto !important; min-height: 0 !important;
 }
-.tac-preset-btn:hover:not(:disabled) { background: var(--p-paper-2); }
-.tac-preset-btn.active { background: var(--p-ink); color: var(--p-paper); box-shadow: 2px 2px 0 var(--p-transmit); }
+.tac-preset-btn:hover:not(:disabled) { background: var(--p-paper-2) !important; }
+.tac-preset-btn.active { background: var(--p-ink) !important; color: var(--p-paper) !important; box-shadow: 2px 2px 0 var(--p-transmit); }
+/* A selected button turns light on hover — keep its text dark so it stays readable. */
+.tac-preset-btn.active:hover:not(:disabled) { color: var(--p-ink) !important; }
 .tac-preset-btn:disabled { cursor: default; }
 .tac-preset-name { font-family: var(--p-mono); font-size: 12px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; }
 .tac-preset-sub { font-family: var(--p-mono); font-size: 10px; opacity: .7; }