ui: Remove model -- a button in the stats card takes the part off the plate and brings back the start page, so the next model needs no reload; the drawn walls, removed fins, load arrow, Suggest list, section cut, scale, import note and undo go with it, the fin settings stay

web/i18n/ar.js

@@ -311,6 +311,8 @@ export default {
   "Restore all": "استعادة الكل",
   "Highlight small overhangs": "إبراز البروزات المعلّقة الصغيرة",
   "Clear all": "مسح الكل",
+  "Remove model": "إزالة النموذج",
+  "Take this model off the plate, to import another without reloading the page.": "إزالة هذا النموذج من اللوحة لاستيراد نموذج آخر دون إعادة تحميل الصفحة.",
   "Remove selected": "إزالة المحدد",
 
   // Manual Draw hint

web/i18n/de.js

@@ -324,6 +324,8 @@ export default {
   "Restore all": "Alle wiederherstellen",
   "Highlight small overhangs": "Kleine Überhänge hervorheben",
   "Clear all": "Alle löschen",
+  "Remove model": "Modell entfernen",
+  "Take this model off the plate, to import another without reloading the page.": "Dieses Modell von der Platte nehmen, um ein anderes ohne Neuladen der Seite zu importieren.",
   "Remove selected": "Ausgewählte entfernen",
 
   // Manual Draw hint

web/i18n/nl.js

@@ -312,6 +312,8 @@ export default {
 	"Restore all": "Alles herstellen",
 	"Highlight small overhangs": "Kleine overhangen markeren",
 	"Clear all": "Alles wissen",
+	"Remove model": "Model verwijderen",
+	"Take this model off the plate, to import another without reloading the page.": "Haal dit model van de plaat om een ander te importeren zonder de pagina te herladen.",
 	"Remove selected": "Selectie verwijderen",
 
 	// Manual Draw hint

web/i18n/pt.js

@@ -296,6 +296,8 @@ export default {
   "Restore all": "Restaurar todas",
   "Highlight small overhangs": "Destacar balanços pequenos",
   "Clear all": "Limpar tudo",
+  "Remove model": "Remover modelo",
+  "Take this model off the plate, to import another without reloading the page.": "Tirar este modelo da mesa, para importar outro sem recarregar a página.",
   "Remove selected": "Remover selecionado",
   "Click two points across an overhang — straight onto the red faces — to lay a breakaway wall along that line. Click an upright side once to stand a sway brace against it. Esc or right-click cancels.": "Clique em dois pontos atravessando um balanço — direto nas faces vermelhas — para criar uma parede destacável ao longo dessa linha. Clique uma vez num lado vertical para apoiar uma escora lateral nele. Esc ou botão direito cancela.",
   "off": "desligado",

web/i18n/zh.js

@@ -327,6 +327,8 @@ export default {
   "Restore all": "全部恢复",
   "Highlight small overhangs": "高亮细小悬垂",
   "Clear all": "全部清除",
+  "Remove model": "移除模型",
+  "Take this model off the plate, to import another without reloading the page.": "将此模型从打印板上移除，无需重新加载页面即可导入另一个模型。",
   "Remove selected": "移除所选",
 
   // Manual Draw hint

web/index.html

@@ -204,6 +204,8 @@
     <dt><i class="sw sw-pad"></i><span data-i18n="Bed pad">Bed&nbsp;pad</span></dt> <dd id="s-pad">—</dd>
     <dt data-i18n="Analysis">Analysis</dt>                            <dd id="s-time">—</dd>
   </dl>
+  <button type="button" class="btn sm" id="remove-part" data-i18n-title
+          title="Take this model off the plate, to import another without reloading the page."><span data-i18n="Remove model">Remove model</span></button>
 </aside>
 
 </div><!-- /left-rail -->

web/style.css

@@ -347,6 +347,7 @@ html, body {
    fin/pad time is appended, and that one-line growth used to nudge everything below
    the panel down when fins were added. Always two lines high = no shift. */
 #stats #s-time { display: block; min-height: 2.6em; line-height: 1.3; }
+#stats #remove-part { margin-top: 10px; }
 #stats hr {
   border: 0;
   border-top: 1px solid var(--line);

web/ui/io.js

@@ -63,6 +63,14 @@ export function renderImportNote() {
 
 /** The part was rescaled (ui/scale.js): the supports a saved session brought back
  *  are gone with it, so the note no longer says they were restored. */
+/** The part was taken off the plate (part.js clearPart): its import note goes too. */
+export function forgetImport() {
+  importNote = '';
+  lastImportMeta = null;
+  pendingSession = null;
+  el('s-import-note').textContent = '';
+}
+
 export function forgetSessionNote() {
   if (!lastImportMeta?.session) return;
   lastImportMeta.session = null;

web/ui/part.js

@@ -7,14 +7,14 @@ import { t, tn } from './i18n.js';
 import * as THREE from 'three';
 import { buildTopology, analyze, DEFAULT_THRESHOLD, MIN_REGION_AREA } from '../overhangs.js';
 import { el } from './dom.js';
-import { scene, controls, frame, clip, MODEL } from './scene.js';
+import { scene, controls, frame, clip, MODEL, requestRender } from './scene.js';
 import { setSection, followPart } from './section.js';
 import { showToolbar } from './toolbar.js';
 import { removeMode, cancelRemove, resetRemovals } from './remove.js';
 import { resetHistory } from './history.js';
-import { importNote, renderImportNote } from './io.js';
+import { importNote, renderImportNote, forgetImport } from './io.js';
 import { currentVolume } from './volume.js';
-import { resetLoad, updateLayerView, updateLoadReadout, syncLoadUI } from './strength.js';
+import { resetLoad, updateLayerView, hideLayerView, updateLoadReadout, syncLoadUI } from './strength.js';
 import { hideSuggestions } from './suggest.js';
 import {
   setDrawnWalls, setDrawMsg, markPrintTrisDirty, clearPreview, syncDrawControls,
@@ -109,7 +109,21 @@ export function setPart(geometry, filename, { quat } = {}) {
   gizmo.attach(part);
   showToolbar(true);
 
-  // A new part starts with no hand-drawn walls and a fresh print-space cache.
+  resetPartState();
+
+  const size = shade();
+  frame(size);
+  resetScale();
+  return size;
+}
+
+/**
+ * What a part's tools hold that means nothing on another part (or on none): the
+ * drawn walls, removed fins, armed modes, load arrow, Suggest list, section cut and
+ * undo history. Shared by setPart and clearPart.
+ */
+function resetPartState() {
+  // A new part (or none) starts with no hand-drawn walls and a fresh print-space cache.
   setDrawnWalls([]);
   // Per-fin removals are keyed by a content signature that can coincidentally
   // match a different model's fins, so they must NOT carry across parts -- clear
@@ -124,7 +138,7 @@ export function setPart(geometry, filename, { quat } = {}) {
   clearPreview();
   syncAugmentUI();       // "+ Add" is off now: the button and the Draw hint say so
   syncDrawControls();
-  // A new part starts with no load direction either, and no Suggest ranking: the
+  // A new part (or none) starts with no load direction either, and no Suggest ranking: the
   // list and verdict were the OLD part's poses.
   resetLoad();
   hideSuggestions();
@@ -136,11 +150,37 @@ export function setPart(geometry, filename, { quat } = {}) {
 
   // Undo history does not carry across parts.
   resetHistory();
+}
 
-  const size = shade();
-  frame(size);
+/**
+ * Take the part off the plate (the stats card's Remove model): back to the empty
+ * page a fresh tab shows, so the next model needs no reload. The fin settings stay,
+ * as they do across a load.
+ */
+export function clearPart() {
+  if (!part) return;
+  gizmo.detach();
+  part.remove(hoverFace);
+  hoverFace.visible = false;
+  scene.remove(part);
+  part.geometry.dispose();
+  part = null;
+  topology = null;
+  lastResult = lastShadeRes = null;
+  flatRegions = null;
+  painted = paintedAttr = null;
+  lastSize = null;
+  partName = '';
+  resetPartState();
+  refreshFins();           // no lastResult now: drops the fins, pad and readout
   resetScale();
-  return size;
+  forgetImport();
+  hideLayerView();
+  showToolbar(false);
+  el('stats').hidden = true;
+  el('status').hidden = true;
+  el('drop').classList.remove('hidden');
+  requestRender();
 }
 
 /**
@@ -431,4 +471,6 @@ export function syncPartLanguage() {
   renderIslandText();
 }
 
+el('remove-part').addEventListener('click', clearPart);
+
 window.addEventListener('languagechange', syncPartLanguage);

web/ui/strength.js

@@ -108,6 +108,11 @@ export function updateLayerView(size) {
   layerViz.visible = layersOn && !!part;
 }
 
+/** No part on the plate: no layer frames either. */
+export function hideLayerView() {
+  layerViz.visible = false;
+}
+
 // ---------------------------------------------------------------- load arrow UI
 
 /**

web/ui/toolbar.js

@@ -18,8 +18,8 @@
  * 3D view leaves it open (Lay a face flat and Section are used there); Esc folds it
  * and hands focus back to its badge. `onFold` runs when a popover folds, for a mode
  * armed from inside it that must not stay armed out of sight (Lay a face flat).
- * The bar shows once a part is loaded (showToolbar, from part.js); nothing unloads
- * a part, so it is never hidden again.
+ * The bar shows while a part is loaded (showToolbar, from part.js) and hides again
+ * when Remove model takes it off, folding any open popover.
  *
  * It sits bottom-left, at the window's edge -- or just right of the stats card when
  * a short window has scrolled the card down beside it.
@@ -112,5 +112,6 @@ addEventListener('keydown', (e) => {
 /** Show the bar (a part is loaded) or hide it. */
 export function showToolbar(v) {
   el('viewbar').hidden = !v;
+  if (!v && openId) { openId = null; render(); }
   place();
 }