fix: Layout and Insert icons that show what they do

Orientation is one page turned, overlapping so both copies keep full size
and the upright one is traced only where the other leaves it visible. Size
measures a page with dimension arrows; Columns is a page carrying two
columns of text, matching the previews in its own menu; Header and Footer
are a whole page with the zone filled in.

Measured painted boxes: every glyph now centres on 8, 8 and spans 12.9 to
14 units, against 15.16 x 8.56 for the old Orientation.

src/lib/components/ribbon/Ribbon.svelte

@@ -228,9 +228,8 @@
       <span class="doc-name-ext">.odt</span>
     </div>
 
-    <!-- Word puts this chevron in the band's corner. Here it rides the strip: in
-         the corner it covered whichever group's dialog launcher reached the edge,
-         and reserving that corner costs the band a column at every height. -->
+    <!-- Word puts this chevron in the band's corner. It rides the strip so the band
+         keeps its full width: a flex row can only reserve a column, never a corner. -->
     <button
       class="qa-btn rb-collapse"
       class:rb-collapse-up={!collapsed}

src/lib/components/ribbon/RibbonButton.svelte

@@ -35,8 +35,8 @@
 
   const ICON_SIZE = { big: 28, small: 14, icon: 20 } as const;
 
-  // Nothing to split when the whole button opens the menu, so the caret joins the
-  // column under the label instead of sitting beside the icon.
+  // One button when the whole of it opens the menu, and the caret joins the column
+  // under the label.
   let stackCaret = $derived(caret && !onCaret && variant === 'big');
 </script>
 
@@ -115,8 +115,8 @@
     gap: 2px;
   }
 
-  /* Icon over label, and the tint takes both. Word paints only the icon box, but
-     then the words beside an identical-looking neighbour light up and these do not. */
+  /* Icon over label, with the tint over both, so a labelled button and a captioned
+     picker beside it answer the pointer the same way. */
   .rb-big {
     flex-direction: column;
     gap: 4px;

src/lib/components/ribbon/RibbonGroup.svelte

@@ -34,9 +34,8 @@
     padding: 2px 4px 0;
   }
 
-  /* Takes the slack, but the only group that may shrink must still stop: crushed
-     to nothing it shows an empty frame and spills its label onto the next group's.
-     Two tiles plus the gallery's own chevron; past that the band scrolls. */
+  /* Takes the slack down to a floor of two gallery tiles plus its chevron; past
+     that the band scrolls. It is the one group that may shrink at all. */
   .ribbon-group.grow {
     flex: 1;
     min-width: 163px;
@@ -59,8 +58,8 @@
     height: 15px;
   }
 
-  /* Truncates rather than reaching into the next group: a translation longer than
-     its group's controls must read as cut off, not as two labels run together. */
+  /* Stays inside its own group, so a label longer than the controls above it reads
+     as cut off. */
   .ribbon-group-label {
     min-width: 0;
     font-family: var(--w-font);

src/lib/components/ribbon/controls/StyleGallery.svelte

@@ -152,9 +152,8 @@
     align-items: center;
     gap: 2px;
     flex-shrink: 0;
-    /* Wide enough for the longest style name in either locale: 'Überschrift 4'
-       measures 58.4px, and truncating a numbered family before its number tells
-       the five headings apart not at all. */
+    /* Holds the longest style name in either locale, so a numbered family keeps the
+       number that distinguishes it: 'Überschrift 4' measures 58.4px. */
     width: 72px;
     border: 1px solid var(--w-border);
     border-radius: 4px;

src/lib/components/ribbon/icons.ts

@@ -85,22 +85,38 @@ export const STROKED = {
   find: ['M7.25 12.5a5.25 5.25 0 1 0 0-10.5 5.25 5.25 0 0 0 0 10.5z', 'M11.2 11.2 14 14'],
   replace: ['M2 4.5h6.5M2 4.5 4 2.5M2 4.5l2 2', 'M14 11.5H7.5M14 11.5l-2-2M14 11.5l-2 2'],
   margins: ['M1.75 1.75h12.5v12.5H1.75z', 'M4.5 1.75v12.5M11.5 1.75v12.5', 'M1.75 4.5h12.5M1.75 11.5h12.5'],
-  orientation: ['M2.5 2h7v12h-7z', 'M11 6.5h3v6h-3z'],
-  pageSize: ['M2.5 1.75h11v12.5h-11z', 'M5 5h6M5 8h6M5 11h4'],
-  columns: ['M2 2.5h4.5v11H2zM9.5 2.5H14v11H9.5z'],
+  // One page turned: the same 6.5 × 9.2 sheet upright behind and on its side in
+  // front, overlapping so both stay full size. The upright one is traced only where
+  // the other does not cover it. Ratio A4's 0.707.
+  orientation: ['M8.5 7.5V2H2v9.2h2.8', 'M4.8 7.5h9.2v6.5H4.8z'],
+  // A page with its width and height measured off.
+  pageSize: [
+    'M1.75 1.5h7.6v9.8H1.75z',
+    'M1.75 13.7h7.6', 'M2.65 12.8 1.75 13.7l.9.9', 'M8.45 12.8 9.35 13.7l-.9.9',
+    'M13.35 1.5v9.8', 'M12.45 2.4 13.35 1.5l.9.9', 'M12.45 10.4 13.35 11.3l.9-.9',
+  ],
+  // Text running in two columns, the same picture the Columns menu previews.
+  columns: [
+    'M2 2h12v12H2z',
+    'M4 5h3.2M4 8h3.2M4 11h3.2',
+    'M8.8 5H12M8.8 8H12M8.8 11H12',
+  ],
   image: ['M2 3.25h12v9.5H2z', 'M2 10.5 5.75 7l3 2.75L11 7.5l3 3', 'M10.6 6.4a1.1 1.1 0 1 0 0-2.2 1.1 1.1 0 0 0 0 2.2z'],
   textBox: ['M1.75 4h12.5v8H1.75z', 'M5 6.5h6M5 9h4'],
   link: ['M6.6 9.4 9.4 6.6', 'M7.4 4.4 9 2.8a2.7 2.7 0 0 1 3.8 3.8l-1.6 1.6', 'M8.6 11.6 7 13.2a2.7 2.7 0 0 1-3.8-3.8l1.6-1.6'],
   bookmark: ['M4 2.25h8v11.5L8 10.5l-4 3.25z'],
   crossRef: ['M2.5 3.5h6M2.5 6.5h4M2.5 9.5h5', 'M8.5 12.5h5M11 10l2.5 2.5L11 15'],
-  header: ['M2 2.5h12v3H2z', 'M2 8h12M2 11h8'],
-  footer: ['M2 10.5h12v3H2z', 'M2 5h12M2 8h8'],
+  // The whole page with one zone filled in, so which end it is reads at a glance.
+  header: ['M3.5 1.75h9v12.5h-9z', 'M5.4 7.8h5.2M5.4 9.9h5.2M5.4 12h3.1'],
+  footer: ['M3.5 1.75h9v12.5h-9z', 'M5.4 4h5.2M5.4 6.1h5.2M5.4 8.2h3.1'],
   pageNumber: ['M3.25 1.75h9.5v12.5h-9.5z', 'M6.9 6.4 8 5.3v5.2', 'M6.75 10.5h2.5'],
-  pageBreak: ['M2 4.5h12M2 11.5h12', 'M8 6.5v3', 'M6.4 8.2 8 9.8l1.6-1.6'],
+  pageBreak: ['M2 2.5h12M2 13.5h12', 'M8 5.5v5.2', 'M6.2 8.9 8 10.7l1.8-1.8'],
 } as const;
 
 export const FILLED = {
   infoDot: ['M8 4.4a.8.8 0 1 0 0 1.6.8.8 0 0 0 0-1.6z'],
+  header: ['M5.4 3.8h5.2v1.7H5.4z'],
+  footer: ['M5.4 10.5h5.2v1.7H5.4z'],
 } as const;
 
 // Constant painted stroke rather than proportional scaling: a 1-unit stroke would

src/lib/components/ribbon/menu.svelte.ts

@@ -113,9 +113,8 @@ export function clickOutside(node: HTMLElement, id?: string) {
 }
 
 // A reused picker keeps its trigger inside its own component, so the caption the
-// ribbon puts beside it is not part of that button: hovering the words lit nothing
-// and clicking them did nothing. Forwards a click that missed every button to the
-// first one, so glyph and caption behave as the single control they look like.
+// ribbon sets beside it belongs to no button. Forwards a click that missed every
+// button to the first one, so glyph and caption act as the one control they look like.
 export function captionClicks(node: HTMLElement) {
   function handler(e: MouseEvent) {
     if ((e.target as HTMLElement).closest('button, select, input')) return;

src/lib/components/ribbon/tabs/LayoutTab.svelte

@@ -287,9 +287,8 @@
     gap: 3px 12px;
   }
 
-  /* The label takes whatever its grid column is wide, so the boxes line up on the
-     column's right edge. A fixed label width only holds until a translation
-     outgrows it, and then one row of the pair sits deeper than the other. */
+  /* The label takes whatever its grid column is wide, so the boxes line up on that
+     column's right edge at any label length. */
   .margin-field > span, .field > span {
     flex: 1;
     white-space: nowrap;