Merge pull request 'editor head: wrap toggle state and pill highlight (#166)' (#172) from fix-166 into dev

wrap button on the new paste page looked identical whether wrap was on
or off because the btn base is already accent filled. give the toggle a
neutral off state so the accent on state is visible, matching the icon
button toggles on the paste view.

also remove the accent border on the whole language settings pill when
any child has focus. individual controls already show their own focus
rings, so the pill highlight made no sense.

internal/web/static/app.css

@@ -150,8 +150,7 @@ body {
 }
 .editor-head-title { flex: 1; min-width: 0; }
 .editor-head-settings { flex: 0 0 fit-content; }
-.editor-head-title:focus-within,
-.editor-head-settings:focus-within { border-color: var(--accent); }
+.editor-head-title:focus-within { border-color: var(--accent); }
 .editor-head input {
   border: none; outline: none; background: transparent; color: var(--fg); font: inherit; font-size: 23.2px; flex: 1;
 }
@@ -266,6 +265,10 @@ body {
 .theme-name { font-weight: 600; }
 .iconbtn:hover { color: var(--fg); border-color: var(--muted); }
 /* #130: line wrap toggle, accent when active like other toggles */
+/* #166: wrap toggle must show its state: neutral when off, accent when on.
+   The .btn base is accent filled, which made on and off look identical. */
+.btn-icon.wrap-toggle { background: var(--surface-2); color: var(--muted-fg); font-size: 21.6px; font-weight: inherit; border: 1px solid var(--border); }
+.btn-icon.wrap-toggle:hover { color: var(--fg); border-color: var(--muted-fg); filter: none; }
 .iconbtn.wrap-toggle[aria-pressed="true"],
 .btn-icon.wrap-toggle[aria-pressed="true"] { background: var(--accent); color: var(--bg); border-color: var(--accent); }
 /* #152: wrap ON must break long unbroken tokens mid-word and allow no horizontal scrolling */