README.md

@@ -273,7 +273,14 @@ below. Nothing is installed without someone clicking.
   place and shows nothing, then appears when it is; it is never replaced by
   the module's default tile. Saving over an existing name asks first, and
   the server keeps the copy it replaced: **Restore previous** in Admin →
-  Saved layouts swaps it back (and swapping again undoes that).
+  Saved layouts swaps it back (and swapping again undoes that). The menu's
+  **Grid Size** stepper sets how many columns this browser cuts the board into —
+  8 to 24, 12 by default. Finer lets tiles be smaller so more fit across (a
+  4K wall), coarser suits a small screen read close up; row height follows,
+  so tiles keep their shape and simply change size. Going coarser, a tile
+  that no longer fits where it was moves to the first free spot rather than
+  onto another tile. It saves with the layout, so a named layout comes back
+  at the density it was arranged on.
 - Every tile has a **status dot**: green = live, amber = connecting,
   red = upstream unreachable (hover it for details). Tiles reconnect
   automatically.

docs/MODULE-GUIDE.md

@@ -136,7 +136,7 @@ the app); its settings are kept for a later reinstall.
 | `client` | yes | Client entry file, loaded as an ES module. |
 | `server` | no | Server entry file (CommonJS), loaded with `require()`. |
 | `style` | no | A stylesheet the shell injects once per module. |
-| `minSize`, `defaultSize` | no | Tile size in grid cells (12 columns wide; rows are ~72 px). Defaults: min 1×1, default 4×3. |
+| `minSize`, `defaultSize` | no | Tile size in grid cells, declared for the default grid (12 columns, 72 px rows). Defaults: min 1×1, default 4×3. A dashboard may cut its board finer or coarser (8–24 columns, from the Layouts menu; row height follows). `defaultSize` is scaled to that density when a tile is added, so a new tile lands at about the size you meant; `minSize` is enforced in cells as declared, so on a finer grid a tile can be made smaller than it could at 12. |
 | `configSchema` | no | **Admin config** — server-wide settings (URLs, ports, keys) edited once at `/admin` for everyone. |
 | `instanceSchema` | no | **Per-tile settings** — chosen in each tile's gear menu and stored with that browser's layout (filters, text sizes, display options). They apply as they are changed, so keep them to display choices. |
 | `tiles` | no | Fixed multi-tile list for client-only modules; server modules export a dynamic `tiles()` instead. See **Presenting multiple tiles**. |

package.json

@@ -1,6 +1,6 @@
 {
   "name": "proddash",
-  "version": "1.8.0",
+  "version": "1.9.0",
   "private": true,
   "description": "Modular production dashboard for Waters Church \u2014 zero-dependency Node server + vanilla client",
   "license": "UNLICENSED",

public/shell.js

@@ -5,7 +5,18 @@
    settings) autosaves to this browser's localStorage — every browser is fully
    independent. Modules render inside tile bodies and never touch the shell.  */
 
-const COLS = 12;
+/* ── grid density ─────────────────────────────────────────────────────
+   How many columns the board is cut into. Twelve is the default; a finer
+   grid lets tiles be smaller and more of them fit across (a 4K wall), a
+   coarser one suits a small screen read close up. It is this browser's
+   choice — two displays at one location may want different densities — so
+   it saves with the layout, local and named, and a named layout comes back
+   at the density it was arranged on. Row height follows the column width, so
+   cells keep their shape: a 3×2 tile is still a 3×2 tile, only smaller. */
+const GRID_STEPS = [8, 10, 12, 16, 20, 24];
+const GRID_DEFAULT = 12;
+const CELL_H_DEFAULT = 72; // px per row at the default density
+let COLS = GRID_DEFAULT;
 const LS_LAYOUT = 'proddash:layout';
 
 const grid = document.getElementById('grid');
@@ -224,7 +235,7 @@ const LS_LAYOUT_PREVIOUS = LS_LAYOUT + '.previous';
 
 function saveLayout() {
   try {
-    const next = JSON.stringify({ v: 1, autoHideHeads, tiles });
+    const next = JSON.stringify({ v: 1, autoHideHeads, gridCols: COLS, tiles });
     const current = localStorage.getItem(LS_LAYOUT);
     if (current && current !== next) localStorage.setItem(LS_LAYOUT_BACKUP, current);
     localStorage.setItem(LS_LAYOUT, next);
@@ -275,6 +286,87 @@ function newId() {
 
 /* ── grid geometry & collision ──────────────────────────────────────── */
 
+function normalizeGridCols(value) {
+  const n = Number(value);
+  return GRID_STEPS.includes(n) ? n : GRID_DEFAULT;
+}
+
+function cellHeightFor(cols) {
+  return Math.round((CELL_H_DEFAULT * GRID_DEFAULT) / cols);
+}
+
+/** Cut the board into `cols` columns. Tiles keep their grid units — the
+    board gets denser or coarser and everything on it changes size with it.
+    A tile now past the right edge is pulled back in, and one that would then
+    sit on another moves to the first free spot instead. */
+function setGridCols(value, { save = true } = {}) {
+  const next = normalizeGridCols(value);
+  const changed = next !== COLS;
+  COLS = next;
+  grid.style.gridTemplateColumns = `repeat(${COLS}, minmax(0, 1fr))`;
+  document.documentElement.style.setProperty('--cell-h', cellHeightFor(COLS) + 'px');
+  if (changed) {
+    // A coarser board may not have room for every tile where it was. Settle
+    // them in reading order: pull a tile past the right edge back in, and
+    // give one that would then land on a tile already settled the first free
+    // spot instead — tiles never overlap here, any more than under a drag.
+    const settled = [];
+    for (const tile of tiles.slice().sort((a, b) => a.y - b.y || a.x - b.x)) {
+      tile.w = Math.max(1, Math.min(COLS, tile.w));
+      tile.x = Math.max(0, Math.min(COLS - tile.w, tile.x));
+      if (settled.some((s) => overlaps(tile, s))) Object.assign(tile, spotAmong(tile.w, tile.h, settled));
+      settled.push(tile);
+      applyRect(tile);
+      notifyResize(tile);
+    }
+    rebuildDividers();
+    if (document.body.classList.contains('fullscreen')) applyFullscreenFit();
+  }
+  if (save) saveLayout();
+}
+
+const STEP_MINUS_SVG = '<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2.6" stroke-linecap="round" aria-hidden="true"><path d="M5 12h14"/></svg>';
+const STEP_PLUS_SVG = '<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2.6" stroke-linecap="round" aria-hidden="true"><path d="M12 5v14M5 12h14"/></svg>';
+
+/** The Layouts menu's density row — Grid Size  − 12 + — which steps without
+    closing the menu, so the board can be watched changing behind it. */
+function gridStepper() {
+  const row = document.createElement('div');
+  row.className = 'menu-stepper';
+  const label = document.createElement('span');
+  label.className = 'menu-stepper-label';
+  label.textContent = 'Grid Size';
+  const minus = document.createElement('button');
+  minus.type = 'button';
+  minus.className = 'menu-stepper-btn';
+  minus.setAttribute('data-tip', 'Coarser');
+  minus.innerHTML = STEP_MINUS_SVG;
+  const value = document.createElement('span');
+  value.className = 'menu-stepper-value';
+  const plus = document.createElement('button');
+  plus.type = 'button';
+  plus.className = 'menu-stepper-btn';
+  plus.setAttribute('data-tip', 'Finer');
+  plus.innerHTML = STEP_PLUS_SVG;
+  const paint = () => {
+    const i = GRID_STEPS.indexOf(COLS);
+    value.textContent = String(COLS);
+    minus.disabled = i <= 0;
+    plus.disabled = i >= GRID_STEPS.length - 1;
+  };
+  const step = (dir) => {
+    const i = GRID_STEPS.indexOf(COLS) + dir;
+    if (i < 0 || i >= GRID_STEPS.length) return;
+    setGridCols(GRID_STEPS[i]);
+    paint();
+  };
+  minus.addEventListener('click', () => step(-1));
+  plus.addEventListener('click', () => step(1));
+  paint();
+  row.append(label, minus, value, plus);
+  return row;
+}
+
 function cellMetrics() {
   const style = getComputedStyle(grid);
   const gapRaw = parseFloat(style.columnGap);
@@ -297,6 +389,17 @@ function isFree(rect, excludeId) {
   return isFreeExcept(rect, [excludeId]);
 }
 
+/** First spot, scanning top-to-bottom, left-to-right, clear of these tiles. */
+function spotAmong(w, h, others) {
+  for (let y = 0; y < 400; y += 1) {
+    for (let x = 0; x <= COLS - w; x += 1) {
+      const rect = { x, y, w, h };
+      if (!others.some((o) => overlaps(rect, o))) return { x, y };
+    }
+  }
+  return { x: 0, y: 0 };
+}
+
 /** First free spot scanning top-to-bottom, left-to-right. */
 function findSpot(w, h) {
   for (let y = 0; y < 200; y += 1) {
@@ -990,10 +1093,14 @@ function addTile(moduleId, entry = null) {
     toast(`${entry.name} is already on this dashboard`);
     return;
   }
+  // Sizes are declared for the default twelve-column grid; scaled so a new
+  // tile lands at about the size its author meant, whatever the density here.
+  const scale = COLS / GRID_DEFAULT;
   const defaultSize = entry?.defaultSize || man?.defaultSize;
+  const floor = minSizeOf({ module: moduleId, minSize: entry?.minSize });
   const size = {
-    w: Math.max(1, Math.min(COLS, defaultSize?.w || 4)),
-    h: Math.max(1, defaultSize?.h || 3),
+    w: Math.max(floor.w, 1, Math.min(COLS, Math.round((defaultSize?.w || 4) * scale))),
+    h: Math.max(floor.h, 1, Math.round((defaultSize?.h || 3) * scale)),
   };
   const spot = findSpot(size.w, size.h);
   const settings = {};
@@ -1991,6 +2098,8 @@ function renderLayout(layout) {
   // "reset" can simply hand over no tiles.
   const list = Array.isArray(layout) ? layout : (layout?.tiles || []);
   clearAllTiles();
+  // Density first: the tiles are clamped and placed against it.
+  if (!Array.isArray(layout)) setGridCols(layout?.gridCols ?? GRID_DEFAULT, { save: false });
   tiles = list.map(sanitizeTile);
   if (!Array.isArray(layout)) setAutoHideHeads(Boolean(layout?.autoHideHeads), { save: false });
   for (const tile of tiles) if (tileIsOffered(tile)) buildTile(tile);
@@ -2057,6 +2166,13 @@ function renderAddMenu(menu) {
 wireDropdown('layout-btn', 'layout-menu', async (menu, stillOpen) => {
   menu.innerHTML = '';
 
+  // Density first: the one thing in here that is not a layout but the board
+  // the layouts are arranged on.
+  menu.appendChild(gridStepper());
+  const stepperDivider = document.createElement('div');
+  stepperDivider.className = 'menu-divider';
+  menu.appendChild(stepperDivider);
+
   menu.appendChild(menuItem('Save as named layout…', async () => {
     menu.hidden = true;
     if (!tiles.length) {
@@ -2088,7 +2204,7 @@ wireDropdown('layout-btn', 'layout-menu', async (menu, stillOpen) => {
       const res = await fetch('/api/layouts/' + encodeURIComponent(name), {
         method: 'PUT',
         headers: { 'Content-Type': 'application/json' },
-        body: JSON.stringify({ layout: { autoHideHeads, tiles } }),
+        body: JSON.stringify({ layout: { autoHideHeads, gridCols: COLS, tiles } }),
       });
       const body = await res.json().catch(() => ({}));
       if (!res.ok) throw new Error(body.error || 'Save failed (' + res.status + ')');
@@ -2136,15 +2252,17 @@ wireDropdown('layout-btn', 'layout-menu', async (menu, stillOpen) => {
         // does not live-link browsers together.
         let outgoing = null;
         try { outgoing = localStorage.getItem(LS_LAYOUT); } catch { /* fine */ }
+        const gridBefore = COLS;
         renderLayout(body.layout);
         saveLayout();
         try { if (outgoing) localStorage.setItem(LS_LAYOUT_PREVIOUS, outgoing); } catch { /* fine */ }
         const unshown = unshownTileNames();
         const count = `${tiles.length} tile${tiles.length === 1 ? '' : 's'}`;
+        const gridNote = COLS !== gridBefore ? ` on a ${COLS}-column grid` : '';
         const note = unshown.length
           ? `, ${unshown.length} not shown — ${unshown.join(', ')} ${unshown.length === 1 ? 'isn’t' : 'aren’t'} offered right now`
           : '';
-        toast(`Loaded “${l.name}”: ${count}${note}`, false, {
+        toast(`Loaded “${l.name}”: ${count}${gridNote}${note}`, false, {
           ms: unshown.length ? 10000 : 7000,
           action: outgoing ? {
             label: 'Undo',
@@ -2300,7 +2418,8 @@ function applyFullscreenFit() {
 }
 
 function clearFullscreenFit() {
-  grid.style.gridTemplateColumns = '';
+  // Back to this browser's density, not the stylesheet's twelve.
+  grid.style.gridTemplateColumns = `repeat(${COLS}, minmax(0, 1fr))`;
   grid.style.gridAutoRows = '';
   gridwrap.classList.remove('no-scroll');
   for (const tile of tiles) {

public/style.css

@@ -187,6 +187,36 @@ body.menu-hidden #topbar {
   white-space: normal;
 }
 .menu-divider { height: 1px; background: var(--border); margin: 5px 4px; }
+
+/* the Layouts menu's grid-density row: Grid Size  − 12 + */
+.menu-stepper {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  padding: 6px 10px 8px;
+  font-size: 13px;
+}
+.menu-stepper-label { flex: 1; }
+.menu-stepper-btn {
+  width: 26px;
+  height: 26px;
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  background: var(--bg);
+  border: 1px solid var(--border);
+  border-radius: 6px;
+  color: var(--text);
+  cursor: pointer;
+}
+.menu-stepper-btn:hover { border-color: var(--muted); }
+.menu-stepper-btn[disabled] { opacity: 0.35; cursor: default; }
+.menu-stepper-btn svg { width: 12px; height: 12px; display: block; }
+.menu-stepper-value {
+  min-width: 28px;
+  text-align: center;
+  font-variant-numeric: tabular-nums;
+}
 .menu-title {
   padding: 6px 10px 3px;
   color: var(--muted);

server.js

@@ -1619,6 +1619,7 @@ function previousLayoutPath(name) {
    so an old file does not haunt a new client. */
 
 const LAYOUT_VERSION = 2;
+const GRID_STEPS = [8, 10, 12, 16, 20, 24]; // the shell's grid densities
 const MAX_LAYOUT_TILES = 100;
 const KNOWN_TILE_FIELDS = new Set(['id', 'module', 'x', 'y', 'w', 'h', 'settings', 'variant', 'title', 'headPinned', 'minSize']);
 const RETIRED_TILE_FIELDS = new Set(['headHidden']);
@@ -1644,6 +1645,9 @@ function sanitizeLayout(raw) {
     // Whether tile title bars auto-hide is part of how a dashboard is
     // arranged, so it travels with the layout like the tiles themselves.
     autoHideHeads: Boolean(raw?.autoHideHeads),
+    // The grid density the layout was arranged on, when it says and it is one
+    // the shell knows; a browser loading it cuts its board the same way.
+    ...(GRID_STEPS.includes(Number(raw?.gridCols)) ? { gridCols: Number(raw.gridCols) } : {}),
     tiles: tiles.map((t) => {
       const tile = {
         id: String(t?.id || ''),

tools/layout-roundtrip.test.js

@@ -88,7 +88,7 @@ async function waitFor(url, ms = 15000) {
       headHidden: true,
     };
 
-    let r = await api('/api/layouts/Booth%20A', { method: 'PUT', body: JSON.stringify({ layout: { autoHideHeads: true, tiles: [tile] } }) });
+    let r = await api('/api/layouts/Booth%20A', { method: 'PUT', body: JSON.stringify({ layout: { autoHideHeads: true, gridCols: 16, tiles: [tile] } }) });
     assert.equal(r.status, 200, 'save: ' + JSON.stringify(r.body));
     assert.equal(r.body.replaced, false, 'a first save replaces nothing');
 
@@ -97,6 +97,7 @@ async function waitFor(url, ms = 15000) {
     const got = r.body.layout;
     assert.equal(got.v, 2, 'the file carries a schema version');
     assert.equal(got.autoHideHeads, true);
+    assert.equal(got.gridCols, 16, 'grid density travels with the layout');
     const t = got.tiles[0];
     for (const k of ['id', 'module', 'x', 'y', 'w', 'h', 'variant', 'title', 'headPinned']) assert.deepEqual(t[k], tile[k], k);
     assert.deepEqual(t.settings, tile.settings, 'settings');
@@ -107,7 +108,7 @@ async function waitFor(url, ms = 15000) {
     assert.equal('headHidden' in t, false, 'a retired field is dropped');
 
     // Saving over the name keeps the copy it replaced.
-    r = await api('/api/layouts/Booth%20A', { method: 'PUT', body: JSON.stringify({ layout: { tiles: [{ ...tile, title: 'Service v2' }] } }) });
+    r = await api('/api/layouts/Booth%20A', { method: 'PUT', body: JSON.stringify({ layout: { gridCols: 13, tiles: [{ ...tile, title: 'Service v2' }] } }) });
     assert.equal(r.status, 200);
     assert.equal(r.body.replaced, true, 'the second save reports a replacement');
     assert.ok(fs.existsSync(path.join(layoutsDir, 'Booth A.previous.json')), 'the replaced copy is kept');
@@ -125,6 +126,7 @@ async function waitFor(url, ms = 15000) {
     assert.equal(r.status, 200);
     r = await api('/api/layouts/Booth%20A');
     assert.equal(r.body.layout.tiles[0].title, 'Service v2', 'restoring again goes forward again');
+    assert.equal('gridCols' in r.body.layout, false, 'a density the shell does not offer is dropped, not stored');
     r = await api('/api/layouts/Never%20Saved/restore', { method: 'POST', body: '{}' });
     assert.equal(r.status, 404, 'nothing to restore is said, not faked');