Add auto-start targets feature with dashboard section

- Add auto_start boolean field to PictureTarget model (persisted per-target)
- Wire auto_start through API schemas, routes, and store
- Auto-start targets on server boot in main.py lifespan
- Add star toggle button on target cards (next to delete button)
- Add auto-start section on dashboard between performance and profiles
- Remove auto-start section from profiles tab

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

server/src/wled_controller/static/js/features/dashboard.js

@@ -363,6 +363,38 @@ export async function loadDashboard(forceFullRender = false) {
                 return;
             }
 
+            const autoStartTargets = enriched.filter(t => t.auto_start);
+            if (autoStartTargets.length > 0) {
+                const autoStartItems = autoStartTargets.map(target => {
+                    const isRunning = !!(target.state && target.state.processing);
+                    const device = devicesMap[target.device_id];
+                    const deviceName = device ? device.name : '';
+                    const typeIcon = target.target_type === 'key_colors' ? '🎨' : '💡';
+                    const statusBadge = isRunning
+                        ? `<span class="dashboard-badge-active">${t('profiles.status.active')}</span>`
+                        : `<span class="dashboard-badge-stopped">${t('profiles.status.inactive')}</span>`;
+                    return `<div class="dashboard-target dashboard-autostart" data-target-id="${target.id}">
+                        <div class="dashboard-target-info">
+                            <span class="dashboard-target-icon">⭐</span>
+                            <div>
+                                <div class="dashboard-target-name">${escapeHtml(target.name)} ${statusBadge}</div>
+                                ${deviceName ? `<div class="dashboard-target-subtitle">${typeIcon} ${escapeHtml(deviceName)}</div>` : `<div class="dashboard-target-subtitle">${typeIcon}</div>`}
+                            </div>
+                        </div>
+                        <div class="dashboard-target-actions">
+                            <button class="btn btn-icon ${isRunning ? 'btn-warning' : 'btn-success'}" onclick="${isRunning ? `dashboardStopTarget('${target.id}')` : `dashboardStartTarget('${target.id}')`}" title="${isRunning ? t('device.stop') : t('device.start')}">
+                                ${isRunning ? '⏹' : '▶'}
+                            </button>
+                        </div>
+                    </div>`;
+                }).join('');
+
+                dynamicHtml += `<div class="dashboard-section">
+                    ${_sectionHeader('autostart', t('autostart.title'), autoStartTargets.length)}
+                    ${_sectionContent('autostart', autoStartItems)}
+                </div>`;
+            }
+
             if (profiles.length > 0) {
                 const activeProfiles = profiles.filter(p => p.is_active);
                 const inactiveProfiles = profiles.filter(p => !p.is_active);