feat: add plan-only space export

Issue: #167
User-Visible: yes

src/houseplan-card.ts

@@ -1396,7 +1396,7 @@ class HouseplanCard extends LitElement {
     busy: boolean;
   } | null = null;
   private _backupExportDialog: {
-    kind: 'full' | 'space'; busy: boolean; error: string;
+    kind: 'full' | 'space'; planOnly: boolean; busy: boolean; error: string;
   } | null = null;
   private _backupImportDialog: {
     filename: string; size: number; token: string; preview: any;
@@ -13088,7 +13088,7 @@ class HouseplanCard extends LitElement {
 
   private _openBackupExport = (): void => {
     this._settingsDialog = null;
-    this._backupExportDialog = { kind: 'full', busy: false, error: '' };
+    this._backupExportDialog = { kind: 'full', planOnly: false, busy: false, error: '' };
   };
 
   private async _runBackupExport(): Promise<void> {
@@ -13100,6 +13100,7 @@ class HouseplanCard extends LitElement {
         type: 'houseplan/export/create',
         kind: d.kind,
         space_id: d.kind === 'space' ? this._space : undefined,
+        ...(d.kind === 'space' && d.planOnly ? { plan_only: true } : {}),
         card_version: CARD_VERSION,
       });
       const blob = new Blob([JSON.stringify(response.document, null, 2) + '\n'], {
@@ -13285,7 +13286,8 @@ class HouseplanCard extends LitElement {
       <div class="body backupbody">
         <div class="rhint">${this._t('backup.export_hint')}</div>
         <label class="srcrow"><input type="radio" name="backup-kind" value="full"
-          .checked=${d.kind === 'full'} @change=${() => (this._backupExportDialog = { ...d, kind: 'full' })} />
+          .checked=${d.kind === 'full'}
+          @change=${() => (this._backupExportDialog = { ...d, kind: 'full', planOnly: false })} />
           <span>${this._t('backup.full')}</span></label>
         <label class="srcrow"><input type="radio" name="backup-kind" value="space"
           .checked=${d.kind === 'space'} ?disabled=${!currentSpace}
@@ -13293,6 +13295,13 @@ class HouseplanCard extends LitElement {
           <span>${currentSpace
             ? this._t('backup.current_space_title', { title: currentSpace.title || currentSpace.id })
             : this._t('backup.no_current_space')}</span></label>
+        ${d.kind === 'space' && currentSpace ? html`<label class="srcrow backupplanonly">
+          <input type="checkbox" .checked=${d.planOnly}
+            @change=${(event: Event) => (this._backupExportDialog = {
+              ...d, planOnly: (event.target as HTMLInputElement).checked,
+            })} />
+          <span><b>${this._t('backup.plan_only')}</b><small>${this._t('backup.plan_only_hint')}</small></span>
+        </label>` : nothing}
         <div class="backupwarn">${this._t('backup.privacy_warning')}</div>
         ${d.error ? html`<div class="backuperror" role="alert">${d.error}</div>` : nothing}
       </div>
@@ -13320,6 +13329,7 @@ class HouseplanCard extends LitElement {
         ${p ? html`
           <div class="backupsummary">
             <b>${this._t(p.kind === 'full' ? 'backup.full' : 'backup.current_space')}</b>
+            ${p.plan_only ? html`<span class="backupplanonlystatus">${this._t('backup.plan_only_preview')}</span>` : nothing}
             <span>${this._t(p.source === 'same' ? 'backup.same_source' : 'backup.foreign_source')}</span>
             <span>${this._t('backup.created', { value: p.created_at || '—' })}</span>
             <span>${this._t('backup.versions', {

src/i18n/en.json

@@ -825,6 +825,9 @@
   "backup.current_space": "Current space",
   "backup.current_space_title": "Current space: {title}",
   "backup.no_current_space": "No current space",
+  "backup.plan_only": "Plan only",
+  "backup.plan_only_hint": "Keep rooms, walls, openings, decor and room-label positions without devices or Home Assistant bindings.",
+  "backup.plan_only_preview": "This file contains the plan only",
   "backup.privacy_warning": "The archive keeps names, Home Assistant identifiers and exact coordinates. Internal plans and attachments are referenced, not embedded; runtime states and vacuum trails are not included.",
   "backup.download": "Download JSON",
   "backup.export_done": "Backup downloaded",

src/i18n/ru.json

@@ -825,6 +825,9 @@
   "backup.current_space": "Текущее пространство",
   "backup.current_space_title": "Текущее пространство: {title}",
   "backup.no_current_space": "Нет текущего пространства",
+  "backup.plan_only": "Только планировка",
+  "backup.plan_only_hint": "Сохранить комнаты, стены, проёмы, декор и позиции подписей комнат без устройств и привязок Home Assistant.",
+  "backup.plan_only_preview": "Файл содержит только планировку",
   "backup.privacy_warning": "Архив сохраняет названия, идентификаторы Home Assistant и точные координаты. Внутренние планы и вложения указываются ссылками, но не вкладываются; текущие состояния и маршруты пылесосов не включаются.",
   "backup.download": "Скачать JSON",
   "backup.export_done": "Резервная копия скачана",

src/styles.ts

@@ -2867,6 +2867,10 @@ export const cardStyles = css`
     .backupupload > .btn { width: 100%; justify-content: center; }
     .backupupload input { display: none; }
     .backupbody { min-width: 0; }
+    .backupplanonly { margin-inline-start: var(--sp-4) !important; align-items: flex-start !important; }
+    .backupplanonly > span:first-of-type { display: grid; gap: 2px; white-space: normal; }
+    .backupplanonly small { color: var(--secondary-text-color); line-height: 1.35; }
+    .backupplanonlystatus { color: var(--hp-accent) !important; font-weight: 700; }
     .backupfile, .backupsummary, .backupcontent {
       display: flex;
       flex-direction: column;