// ── Board rendering & card interactions ──

import { $, esc, api } from './util.js';
import { state, sortedCards, parseTags, tagChipHtml, getChildren, getRecent, getFavorites, isFavorite, SORT_MODES, SORT_ICONS, CARD_COLORS } from './state.js';
import { stripMd, getTodos, firstImage, leadingImage, renderMd, addCodeCopyButtons, formatTodoItems } from './markdown.js';
import { pushReorder, pushCardEdit, pushBatch, snapshotCard } from './undo.js';
import { getCalConfig } from './caldav.js';
import { addProvider as addNotifProvider, render as renderNotifs } from './notifications.js';
import { bindCheckboxes, bindDetailImageFullscreen } from './detail.js';

const board = $('board');
const boardPreview = $('board-preview');

board?.addEventListener('contextmenu', e => {
    if (e.target.closest('[data-id]') || e.target.closest('.superview-item')) return;
    e.preventDefault();
    window._openModal(null);
});
const boardPreviewBody = $('board-preview-body');
const boardPreviewTitle = $('board-preview-title');
const boardPreviewColor = $('board-preview-color');
const boardPreviewTags = $('board-preview-tags');
const boardPreviewMeta = $('board-preview-meta');
let activeDragEl = null;
let dragGhost = null;
// Set of card ids currently being dragged. Module-scoped so a poll-driven
// re-render (caldav/collab) can re-apply the `.card-dragging` ghost class
// to the matching DOM nodes after `board.innerHTML = …` wipes them. Without
// this the dragged card would visually pop back to its normal state every
// time a background poll completed mid-drag.
const draggingCardIds = new Set();

// Tracks every card id we've ever rendered. On the first render we just
// snapshot whatever's currently in state.cards (everything counts as
// "already known"); after that, the diff against this set tells us
// which cards just arrived from a poll / sync. New cards get pushed into
// state.unseenCardIds and either pulse immediately (if we're already on
// the all view) or wait for the next visit to the all tab to pulse.
let knownCardIds = null;

/** Animate card removal: adds .card-removing to each matching card
 *  element and waits for the CSS animation to finish before resolving.
 *  Call this BEFORE the API delete + _reloadAll so the user sees the
 *  card shrink/fade out instead of just vanishing. */
export function animateCardRemoval(ids) {
    if (!ids || !ids.length) return Promise.resolve();
    const els = ids.map(id => board.querySelector(`[data-id="${id}"]`)).filter(Boolean);
    if (!els.length) return Promise.resolve();
    for (const el of els) el.classList.add('card-removing');
    return new Promise(r => setTimeout(r, 260));
}

/** Ghost-and-spinner overlay for cards that are being moved between
 *  buckets. The PATCH + reloadAll round-trip used to leave the original
 *  tile sitting stale in the current bucket for a couple hundred ms;
 *  marking them gives immediate feedback. The class comes off naturally
 *  on the next renderBoard() (the DOM is rebuilt from fresh state). */
export function markCardsMoving(ids) {
    if (!ids || !ids.length) return;
    for (const id of ids) {
        const el = board.querySelector(`[data-id="${id}"]`);
        if (el) el.classList.add('card-moving');
    }
}
window._markCardsMoving = markCardsMoving;

/** Add a pulse class to matching board cards and strip it after the
 *  animation. `cls` controls the variant: 'card-pulse-new' (3×, for
 *  relay-synced cards) or 'card-pulse-local' (1×, for cards the user
 *  just created themselves). */
function pulseCards(ids, cls = 'card-pulse-new') {
    if (!ids || !ids.size) return;
    const durationMs = cls === 'card-pulse-local' ? 900 : 2400;
    requestAnimationFrame(() => {
        for (const id of ids) {
            const el = board.querySelector(`[data-id="${id}"]`);
            if (!el) continue;
            el.classList.add(cls);
            setTimeout(() => el.classList.remove(cls), durationMs);
        }
    });
}

/** Add or remove the unread dot on the fixed `all` bucket-tab. Hidden
 *  while the user is currently looking at the all view. Lives in
 *  board.js (rather than buckets.js) because the trigger is "new card
 *  arrived" — buckets.js doesn't know about that, board.js does. */
function decorateAllUnreadDot() {
    const allTab = document.querySelector('#bucket-bar [data-bucket="all"]');
    if (!allTab) return;
    const hasUnread = state.unseenCardIds.size > 0 && state.activeBucket !== 'all';
    allTab.classList.toggle('has-unread', hasUnread);
    let dot = allTab.querySelector('.bar-unread-dot');
    if (hasUnread && !dot) {
        dot = document.createElement('span');
        dot.className = 'bar-unread-dot';
        allTab.appendChild(dot);
    } else if (!hasUnread && dot) {
        dot.remove();
    }
}

// ── Multi-select ──
const selectedIds = state.selectedIds;
const selectBar = $('select-bar');
const selectCount = $('select-count');

function updateSelectBar() {
    if (!selectBar) return;
    if (selectedIds.size) {
        selectBar.classList.remove('hidden');
        selectCount.textContent = `${selectedIds.size} selected`;
    } else {
        selectBar.classList.add('hidden');
    }
}

function toggleSelect(id) {
    const sid = String(id);
    const el = board.querySelector(`[data-id="${id}"]`);
    if (selectedIds.has(sid)) {
        selectedIds.delete(sid);
        el?.classList.remove('card-selected');
        el?.querySelector('.card-select-check')?.remove();
    } else {
        selectedIds.add(sid);
        el?.classList.add('card-selected');
        if (el && !el.querySelector('.card-select-check')) {
            const check = document.createElement('div');
            check.className = 'card-select-check';
            el.appendChild(check);
        }
    }
    updateSelectBar();
}

function clearSelection() {
    selectedIds.clear();
    state.selectionWasBulk = false;
    board.querySelectorAll('.card-selected').forEach(el => {
        el.classList.remove('card-selected');
        el.querySelector('.card-select-check')?.remove();
    });
    updateSelectBar();
}

export function getSelectedIds() { return [...selectedIds]; }
export { clearSelection };

// Delete/Backspace for selected cards is now in the central shortcuts
// registry (app.js registerShortcut). It uses getSelectedIds() /
// clearSelection() which are already exported.

// Clear selection on click outside board (header, footer, etc)
document.addEventListener('click', e => {
    if (!selectedIds.size) return;
    if (board.contains(e.target)) return;
    if (selectBar?.contains(e.target)) return;
    if (document.querySelector('.bucket-picker')?.contains(e.target)) return;
    clearSelection();
});

$('select-export')?.addEventListener('click', () => {
    if (!selectedIds.size) return;
    window.location.href = 'api/export?ids=' + [...selectedIds].join(',');
});

$('select-group')?.addEventListener('click', async () => {
    if (selectedIds.size < 2) return;
    const ids = [...selectedIds];
    const parentId = ids[0]; // First selected becomes parent
    for (let i = 1; i < ids.length; i++) {
        await api(`api/cards/${ids[i]}`, { method: 'PATCH', body: { parent_id: parentId } });
    }
    clearSelection();
    await window._reloadAll();
});

$('select-join')?.addEventListener('click', async () => {
    if (selectedIds.size < 2) return;
    // Dynamic import keeps the board → context-menu edge lazy and avoids
    // circular import surprises at module load time. joinSelectedCards
    // reads state.selectedIds + state.selectionWasBulk and handles its
    // own reload + selection clear.
    const { joinSelectedCards } = await import('./context-menu.js');
    await joinSelectedCards();
});

$('select-bucket')?.addEventListener('click', () => {
    if (!selectedIds.size) return;
    // Remove existing picker
    document.querySelector('.bucket-picker')?.remove();

    const btn = $('select-bucket');
    const rect = btn.getBoundingClientRect();
    const picker = document.createElement('div');
    picker.className = 'bucket-picker';
    picker.style.cssText = `position:fixed;left:${rect.left}px;bottom:${window.innerHeight - rect.top + 4}px;z-index:200;background:var(--t-surface);border:1px solid var(--t-border);border-radius:4px;box-shadow:0 4px 20px rgba(0,0,0,0.4);min-width:180px;max-height:260px;display:flex;flex-direction:column;`;

    const list = document.createElement('div');
    list.style.cssText = 'overflow-y:auto;flex:1;';
    state.buckets.forEach(b => {
        const item = document.createElement('button');
        item.style.cssText = 'display:flex;align-items:center;gap:8px;width:100%;padding:6px 12px;background:none;border:none;color:var(--t-muted);font-size:12px;cursor:pointer;text-align:left;';
        item.innerHTML = `<span style="width:8px;height:8px;border-radius:2px;background:${b.color || '#64748b'};flex-shrink:0;"></span><span style="font-family:var(--t-font-pixel);font-size:10px;">${esc(b.name)}</span>`;
        item.addEventListener('mouseenter', () => { item.style.color = 'var(--t-bright)'; });
        item.addEventListener('mouseleave', () => { item.style.color = 'var(--t-muted)'; });
        item.addEventListener('click', async () => {
            picker.remove();
            for (const id of selectedIds) await api(`api/cards/${id}`, { method: 'PATCH', body: { bucket_id: b.id } });
            clearSelection();
            await window._reloadAll();
        });
        list.appendChild(item);
    });
    picker.appendChild(list);

    const inputWrap = document.createElement('div');
    inputWrap.style.cssText = 'border-top:1px solid var(--t-border);padding:6px;';
    const input = document.createElement('input');
    input.type = 'text';
    input.placeholder = 'new bucket...';
    input.style.cssText = 'width:100%;background:var(--t-bg);border:1px solid var(--t-border);color:var(--t-bright);padding:4px 8px;font-size:11px;font-family:var(--t-font-pixel);border-radius:3px;';
    input.addEventListener('keydown', async e => {
        if (e.key !== 'Enter') return;
        const name = input.value.trim();
        if (!name) return;
        picker.remove();
        let bucket = state.buckets.find(b => b.name.toLowerCase() === name.toLowerCase());
        if (!bucket) {
            const created = await api('api/buckets', { method: 'POST', body: { name } });
            if (created?.id) bucket = created;
        }
        if (!bucket) return;
        for (const id of selectedIds) await api(`api/cards/${id}`, { method: 'PATCH', body: { bucket_id: bucket.id } });
        clearSelection();
        await window._reloadAll();
    });
    inputWrap.appendChild(input);
    picker.appendChild(inputWrap);

    document.body.appendChild(picker);
    input.focus();

    const closePicker = e => { if (!picker.contains(e.target) && e.target !== btn) { picker.remove(); cleanup(); } };
    const closeOnEsc = e => { if (e.key === 'Escape') { e.stopPropagation(); picker.remove(); cleanup(); } };
    const cleanup = () => { document.removeEventListener('mousedown', closePicker); document.removeEventListener('keydown', closeOnEsc, true); };
    setTimeout(() => { document.addEventListener('mousedown', closePicker); document.addEventListener('keydown', closeOnEsc, true); }, 0);
});

$('select-color')?.addEventListener('click', async () => {
    if (!selectedIds.size) return;
    const { showDialog } = await import('./dialog.js');
    const color = await showDialog({ title: 'set color', input: true, placeholder: '#38bdf8', okLabel: 'Apply' });
    if (!color || !/^#[0-9a-fA-F]{6}$/.test(color.trim())) return;
    for (const id of selectedIds) {
        await api(`api/cards/${id}`, { method: 'PATCH', body: { color: color.trim() } });
    }
    clearSelection();
    await window._reloadAll();
});

$('select-tag')?.addEventListener('click', async () => {
    if (!selectedIds.size) return;
    const { showDialog } = await import('./dialog.js');
    const tag = await showDialog({ title: 'add tag', input: true, placeholder: '#tagname', okLabel: 'Add' });
    if (!tag) return;
    const cleanTag = tag.trim().replace(/^#/, '');
    if (!cleanTag) return;
    for (const id of selectedIds) {
        const card = state.cards.find(c => c.id == id);
        if (!card) continue;
        const body = (card.body || '').trimEnd() + ' #' + cleanTag;
        await api(`api/cards/${id}`, { method: 'PATCH', body: { body } });
    }
    clearSelection();
    await window._reloadAll();
});

$('select-unbucket')?.addEventListener('click', async () => {
    if (!selectedIds.size) return;
    for (const id of selectedIds) {
        await api(`api/cards/${id}`, { method: 'PATCH', body: { bucket_id: null } });
    }
    clearSelection();
    await window._reloadAll();
});

$('select-delete')?.addEventListener('click', async () => {
    if (!selectedIds.size) return;
    if (localStorage.getItem('hyprcrd-confirm-delete') !== '0') {
        const { showDialog } = await import('./dialog.js');
        const ok = await showDialog({ title: 'delete cards', message: `Delete ${selectedIds.size} card${selectedIds.size > 1 ? 's' : ''}?`, danger: true, okLabel: 'Delete' });
        if (!ok) return;
    }
    for (const id of selectedIds) {
        await api(`api/cards/${id}`, { method: 'DELETE' });
    }
    clearSelection();
    await window._reloadAll();
});

$('select-clear')?.addEventListener('click', clearSelection);

// Custom drag ghost that fades near header
document.addEventListener('dragover', e => {
    if (!dragGhost) return;
    const header = document.querySelector('header');
    if (!header) return;
    const headerBottom = header.getBoundingClientRect().bottom;
    const dist = e.clientY - headerBottom;
    const near = dist < 80;
    const op = near ? Math.max(0.08, dist / 80 * 0.5) : 0.5;
    dragGhost.style.opacity = op.toFixed(2);
    dragGhost.style.borderColor = near ? 'var(--t-accent)' : '';
    dragGhost.style.borderWidth = near ? '2px' : '';
    dragGhost.style.boxShadow = near ? '0 0 12px var(--t-accent)' : '';
    dragGhost.style.left = (e.clientX - dragGhost._offsetX) + 'px';
    dragGhost.style.top = (e.clientY - dragGhost._offsetY) + 'px';
});

// ── Sort toggle ──

export function updateSortUI() {
    const btn = $('sort-toggle');
    const label = $('sort-label');
    const icon = document.querySelector('#sort-toggle i');
    const fixedSort = state.activeBucket === 'current' || state.activeBucket === 'journal';
    if (btn) btn.style.display = fixedSort ? 'none' : '';
    if (label) label.textContent = state.sortMode;
    if (icon) icon.className = `ph ${SORT_ICONS[state.sortMode]} text-xs`;
}

// ── Board split preview ──

function showBoardPreview(cardId) {
    const card = state.cards.find(c => c.id == cardId);
    if (!card || !state.boardSplitOpen) return;
    state.boardPreviewCardId = cardId;
    $('board-preview-empty')?.classList.add('hidden');
    $('board-preview-content')?.classList.remove('hidden');
    if (boardPreviewColor) boardPreviewColor.style.background = card.color;
    if (boardPreviewTitle) boardPreviewTitle.textContent = card.title;
    const doneBadge = $('board-preview-done-badge');
    if (doneBadge) doneBadge.classList.toggle('hidden', !parseTags(card).includes('done'));
    if (boardPreviewBody) {
        boardPreviewBody.innerHTML = renderMd(card.body);
        addCodeCopyButtons(boardPreviewBody);
        formatTodoItems(boardPreviewBody);
        bindDetailImageFullscreen(boardPreviewBody);
        bindCheckboxes(boardPreviewBody, card);
    }
    const tags = parseTags(card);
    if (boardPreviewTags) {
        if (tags.length) {
            boardPreviewTags.classList.remove('hidden');
            boardPreviewTags.innerHTML = tags.map(t => tagChipHtml(t)).join('');
        } else {
            boardPreviewTags.classList.add('hidden');
        }
    }
    if (boardPreviewMeta) {
        boardPreviewMeta.textContent = '> ' + (card.updated_at || card.created_at || '').substring(0, 10) + (card.bucket_name ? '  |  ' + card.bucket_name : '');
    }
    // Highlight active card
    board.querySelectorAll('.board-card').forEach(el => el.classList.toggle('preview-active', el.dataset.id == cardId));
}

function closeBoardPreview() {
    boardPreview?.classList.add('hidden');
    state.boardSplitOpen = false;
    localStorage.setItem('hyprcrd-board-split', '0');
    // The toolbar's active state lives on the `.active` class — the
    // previous `text-t-accent` removal was a no-op since that class
    // isn't what toggleBoardSplit uses.
    const btn = $('board-split-toggle');
    if (btn) btn.classList.remove('active');
    board.querySelectorAll('.board-card').forEach(el => el.classList.remove('preview-active'));
    state.boardPreviewCardId = null;
    resetBoardPreview();
}

function resetBoardPreview() {
    $('board-preview-empty')?.classList.remove('hidden');
    $('board-preview-content')?.classList.add('hidden');
    if (boardPreviewTitle) boardPreviewTitle.textContent = '';
    if (boardPreviewBody) boardPreviewBody.innerHTML = '';
}

function toggleBoardSplit() {
    state.boardSplitOpen = !state.boardSplitOpen;
    localStorage.setItem('hyprcrd-board-split', state.boardSplitOpen ? '1' : '0');
    boardPreview?.classList.toggle('hidden', !state.boardSplitOpen);
    const btn = $('board-split-toggle');
    if (btn) btn.classList.toggle('active', state.boardSplitOpen);
    if (!state.boardSplitOpen) {
        board.querySelectorAll('.board-card').forEach(el => el.classList.remove('preview-active'));
        state.boardPreviewCardId = null;
    }
}

$('board-split-toggle')?.addEventListener('click', toggleBoardSplit);
$('board-preview-close')?.addEventListener('click', closeBoardPreview);
$('board-preview-edit')?.addEventListener('click', () => {
    const card = state.cards.find(c => c.id == state.boardPreviewCardId);
    if (card) window._openModal(card);
});

// Init split state
if (state.boardSplitOpen) {
    boardPreview?.classList.remove('hidden');
    const btn = $('board-split-toggle');
    if (btn) btn.classList.add('active');
}

$('superview-toggle')?.addEventListener('click', () => {
    state.superView = !state.superView;
    localStorage.setItem('hyprcrd-superview', state.superView ? '1' : '0');
    const btn = $('superview-toggle');
    const icon = btn?.querySelector('i');
    if (icon) icon.className = `ph ${state.superView ? 'ph-squares-four' : 'ph-list'} text-sm`;
    if (btn) btn.classList.toggle('active', state.superView);
    renderBoard();
});
if (state.superView) {
    const btn = $('superview-toggle');
    const icon = btn?.querySelector('i');
    if (icon) icon.className = 'ph ph-squares-four text-sm';
    if (btn) btn.classList.add('active');
}

function initToggle(id, stateKey, lsKey, iconOff, iconOn) {
    const btn = $(id);
    if (!btn) return;
    const apply = () => {
        const icon = btn.querySelector('i');
        if (icon) icon.className = `ph ${state[stateKey] ? iconOn : iconOff} text-sm`;
        btn.classList.toggle('active', state[stateKey]);
    };
    btn.addEventListener('click', () => {
        state[stateKey] = !state[stateKey];
        localStorage.setItem(lsKey, state[stateKey] ? '1' : '0');
        apply();
        renderBoard();
    });
    apply();
}
initToggle('hide-done', 'hideDone', 'hyprcrd-hide-done', 'ph-check-circle', 'ph-check-square');
initToggle('hide-termine', 'hideTermine', 'hyprcrd-hide-termine', 'ph-calendar-x', 'ph-calendar-check');
initToggle('hide-tagged', 'hideTagged', 'hyprcrd-hide-tagged', 'ph-hash', 'ph-hash-straight');

$('sort-toggle')?.addEventListener('click', () => {
    state.sortMode = SORT_MODES[(SORT_MODES.indexOf(state.sortMode) + 1) % SORT_MODES.length];
    localStorage.setItem('hyprcrd-sort', state.sortMode);
    updateSortUI();
    renderBoard();
});

export function renderCardHtml(c, inGroup = false, recent = []) {
    const loaded = c.body != null;
    const showThumbs = localStorage.getItem('hyprcrd-show-thumbnails') !== '0';
    const coverImg = loaded && showThumbs ? leadingImage(c.body) : null;
    const thumbImg = coverImg ? null : (loaded && showThumbs ? firstImage(c.body) : null);
    const children = getChildren(c.id);
    const isGroup = !inGroup && children.length > 0;
    const todos = loaded ? getTodos(c.body) : null;
    const todoPct = todos ? Math.round(todos.done / todos.total * 100) : 0;
    const hasCover = !!coverImg;
    const tags = parseTags(c);
    const isTermin = tags.includes('termin') || tags.includes('geburtstag');
    let calCfg = null;
    if (isTermin) { for (const t of tags) { if (t && t !== 'termin' && t !== 'geburtstag') { const cfg = getCalConfig(t); if (cfg) { calCfg = cfg; break; } } } }
    const cardColor = calCfg?.color || c.color;
    const calIcon = isTermin ? (calCfg?.icon || 'calendar-dots') : null;
    const overdue = c.due_date && c.due_date < new Date().toISOString().substring(0, 10);
    const barColor = overdue ? 'var(--t-danger)' : cardColor;

    return `
    <div class="board-card ${isGroup ? 'card-group ' : ''}card-glow ${hasCover ? 'card-has-cover' : 'bg-t-surface'} border border-t-border cursor-pointer hover:border-t-muted transition-colors relative group"
         style="--glow-color:${cardColor}22;${hasCover ? `background-image:url('${coverImg}')` : ''};${overdue ? 'border-bottom:3px solid var(--t-danger)' : recent.includes(String(c.id)) ? 'border-bottom:3px solid ' + cardColor : ''}" draggable="true" data-id="${c.id}">
        ${hasCover ? '<div class="card-cover-overlay"></div>' : ''}
        ${tags.includes('done') && localStorage.getItem('hyprcrd-show-done-badge') !== '0' ? '<div class="card-done-badge"><i class="ph ph-check"></i></div>' : ''}
        <div class="card-bar w-full card-layer ${overdue ? 'card-bar-pulse' : ''}" style="background:${barColor}"></div>
        ${isGroup ? `<div class="card-group-badge cursor-pointer hover:scale-110 transition-transform" style="background:${cardColor};color:#000" data-group="${c.id}">${children.length + 1}</div>` : ''}
        ${thumbImg ? `<div class="card-thumb" style="background-image:url('${thumbImg}')"></div>` : ''}
        <div class="p-4 card-layer flex flex-col h-full ${thumbImg ? 'pr-16' : ''}">
            <div class="flex items-start gap-2 mb-2">
                ${calIcon ? `<i class="ph ph-${calIcon} text-xs mt-0.5 shrink-0" style="color:${cardColor}"></i>` : ''}
                ${isFavorite(c.id) ? `<i class="ph-fill ph-star text-amber-400 text-xs mt-0.5 shrink-0"></i>` : ''}
                ${todos ? `<i class="ph ${todos.done === todos.total ? 'ph-check-square text-t-accent' : 'ph-squares-four text-t-muted'} text-sm mt-0.5 shrink-0"></i>` : ''}
                <h3 class="font-pixel text-xs text-t-bright leading-relaxed line-clamp-2">${esc(c.title)}</h3>
            </div>
            ${todos ? `<div class="mb-2">
                <div class="todo-progress">${Array.from({length: todos.total}, (_, i) => `<div class="todo-seg" style="background:${i < todos.done ? cardColor : 'var(--t-border)'}"></div>`).join('')}</div>
            </div>` : ''}
            ${loaded
                ? (localStorage.getItem('hyprcrd-body-lines') === '0' ? '' : `<p class="text-xs ${hasCover ? 'text-t-text' : 'text-t-muted'} leading-relaxed flex-1" style="-webkit-line-clamp:var(--card-body-lines,5);display:-webkit-box;-webkit-box-orient:vertical;overflow:hidden;">${esc(stripMd(c.body))}</p>`)
                : `<div class="flex-1 flex items-center justify-center py-2"><i class="ph ph-spinner card-spinner text-t-dim text-lg"></i></div>`}
            ${tags.length && localStorage.getItem('hyprcrd-show-tags') !== '0' ? `<div class="card-tags flex flex-wrap gap-1 mt-1.5 card-layer">${tags.slice(0, 5).map(t => tagChipHtml(t)).join('')}${tags.length > 5 ? `<span class="tag-chip tag-chip-more">+${tags.length - 5}</span>` : ''}</div>` : ''}
            <div class="mt-auto pt-2 flex items-center gap-2 text-[10px] ${hasCover ? 'text-t-text' : 'text-t-dim'} font-pixel">
                ${c.due_date ? `<span class="due-pill" style="background:${overdue ? 'var(--t-danger)' : cardColor};"><i class="ph ph-clock-countdown" style="font-size:9px;"></i>${c.due_date}</span>` : `<span class="flex items-center gap-1"><i class="ph ph-clock text-xs"></i>${(c.updated_at || c.created_at || '').substring(0, 10)}</span>`}
                ${c.bucket_name ? `<span class="flex items-center gap-1"><i class="ph ph-folder text-xs"></i>${esc(c.bucket_name)}</span>` : ''}
                ${Number(c.read_push) ? '<span class="flex items-center gap-1 text-t-accent" title="On your relay\'s Read list"><i class="ph ph-book-open text-xs"></i></span>' : ''}
            </div>
        </div>
    </div>`;
}

// ── Render ──
//
// Public renderBoard() is coalesced via requestAnimationFrame: multiple
// callers in the same tick (cache paint → meta paint → body paint →
// plugin-hook re-render → ...) collapse into a single actual render on
// the next frame. Dropped the "three innerHTML swaps per reload" cost
// that showed up as the "Gekringel" during boot. Callers that need the
// DOM in a specific state before doing something else can call
// renderBoardSync() explicitly — but in practice every existing caller
// just wants the board to reflect the latest state.

let rafScheduled = 0;
export function renderBoard() {
    if (rafScheduled) return;
    rafScheduled = requestAnimationFrame(() => {
        rafScheduled = 0;
        renderBoardSync();
    });
}
export function renderBoardSync() {
    if (rafScheduled) { cancelAnimationFrame(rafScheduled); rafScheduled = 0; }
    renderBoardImpl();
}

function renderBoardImpl() {
    // Diff state.cards against the last seen ids so we can flag arrivals
    // as "unseen". The very first renderBoard runs with state.cards = []
    // (initial empty state, before the API has returned), so we wait
    // until knownCardIds is non-empty before doing the diff — otherwise
    // the first real load looks like "every card just arrived" and the
    // entire board pulses on page open.
    const currentIds = new Set(state.cards.map(c => String(c.id)));
    const newLocalIds = new Set();
    if (knownCardIds && knownCardIds.size > 0) {
        for (const id of currentIds) {
            if (knownCardIds.has(id)) continue;
            // Locally-created cards go into a separate set — they get a
            // 1× pulse but must NOT trigger the unread dot on the all-tab.
            if (state.recentlyCreatedIds.has(id)) newLocalIds.add(id);
            else state.unseenCardIds.add(id);
        }
    }
    knownCardIds = currentIds;
    let cards;
    if (state.activeGroup) {
        const parent = state.cards.find(c => c.id == state.activeGroup);
        cards = parent ? [parent, ...getChildren(parent.id)] : [];
    } else {
        if (state.activeBucket === 'current') {
            // Current: recently opened/edited cards (not just synced)
            const recent = getRecent();
            const now = Date.now();
            const currentDays = parseInt(localStorage.getItem('hyprcrd-current-days') || '2');
            const freshMs = currentDays * 24 * 60 * 60 * 1000;
            cards = state.cards.filter(c => {
                const tags = (c.tags || '').split(',');
                if (tags.includes('geburtstag')) return false;
                // Recently opened (tracked by markRecent)
                if (recent.includes(String(c.id))) return true;
                // Recently edited locally (not just synced — check synced_at vs updated_at)
                const updated = new Date(c.updated_at || c.created_at || 0).getTime();
                const includeSynced = localStorage.getItem('hyprcrd-current-include-synced') === '1';
                if (!includeSynced) {
                    const synced = c.caldav_synced_at ? new Date(c.caldav_synced_at).getTime() : 0;
                    if (synced && Math.abs(updated - synced) < 3000) return false;
                }
                return (now - updated) < freshMs;
            });
            cards.sort((a, b) => (b.updated_at || b.created_at || '').localeCompare(a.updated_at || a.created_at || ''));
        } else {
            cards = state.cards.filter(c => !c.parent_id);
            if (state.activeBucket === 'favorites') {
                const favs = getFavorites();
                cards = cards.filter(c => favs.includes(String(c.id)));
            } else if (state.activeBucket === 'journal') {
                const today = new Date().toISOString().substring(0, 10);
                cards = cards.filter(c => /^\d{4}-\d{2}-\d{2}/.test(c.title) && c.title.substring(0, 10) <= today && !(c.tags || '').split(',').includes('geburtstag'));
                cards.sort((a, b) => b.title.localeCompare(a.title));
            } else if (state.activeBucket === 'none') {
                cards = cards.filter(c => !c.bucket_id && !/^\d{4}-\d{2}-\d{2}/.test(c.title));
            } else if (state.activeBucket !== 'all') {
                cards = cards.filter(c => c.bucket_id == state.activeBucket);
            }
        }
    }
    // Hide appointments + birthdays (tag-based and caldav-synced)
    if (state.hideTermine) {
        cards = cards.filter(c => { const t = parseTags(c); return !t.includes('termin') && !t.includes('geburtstag') && !c.caldav_uid; });
    }
    // Hide done
    if (state.hideDone) {
        cards = cards.filter(c => !parseTags(c).includes('done'));
    }
    // Hide tagged (cards with any tags)
    if (state.hideTagged) {
        cards = cards.filter(c => !c.tags);
    }
    // Tag filter (intersects with bucket filter) — hierarchical: #nase matches #nase/popel
    if (state.activeTags.length) {
        cards = cards.filter(c => {
            const ct = parseTags(c);
            return state.activeTags.every(at => ct.some(t => t === at || t.startsWith(at + '/')));
        });
    }
    // Current and journal have fixed sort order, skip global sort
    if (state.activeBucket !== 'current' && state.activeBucket !== 'journal') {
        cards = sortedCards(cards);
    }
    updateSortUI();
    window._refreshTasks?.();

    hideFan();
    renderGroupBar(cards);

    if (!cards.length) {
        board.style.display = 'flex';
        board.style.alignItems = 'center';
        board.style.justifyContent = 'center';
        // Distinguish "genuinely empty" from "haven't heard back yet".
        // Blurting "no cards found" during the initial load is scary
        // on boards the user knows aren't empty.
        if (!state.cardsLoaded) {
            board.innerHTML = `<div class="flex flex-col items-center text-center">
                <i class="ph ph-circle-notch text-4xl text-t-dim mb-4 block card-spinner"></i>
                <p class="font-pixel text-sm text-t-dim">loading…</p></div>`;
        } else {
            board.innerHTML = `<div class="flex flex-col items-center text-center">
                <i class="ph ph-cards text-4xl text-t-dim mb-4 block"></i>
                <p class="font-pixel text-sm text-t-dim cursor-blink">no cards found</p></div>`;
        }
        const fc = $('footer-count');
        if (fc) fc.textContent = `0 cards · ${state.cards.length} total`;
        return;
    }

    const recent = getRecent();
    const inGroup = !!state.activeGroup;

    if (state.superView) {
        // Single-column list view — override board grid
        board.style.display = 'block';
        board.innerHTML = `<div class="superview-grid">` + cards.map(c => {
            const tags = parseTags(c);
            const isTermin = tags.includes('termin') || tags.includes('geburtstag');
            let calCfg = null;
            if (isTermin) { for (const t of tags) { if (t !== 'termin' && t !== 'geburtstag') { const cfg = getCalConfig(t); if (cfg) { calCfg = cfg; break; } } } }
            const dotColor = calCfg?.color || c.color;
            const icon = isTermin ? (calCfg?.icon || 'calendar-dots') : (isFavorite(c.id) ? 'star' : null);
            const iconColor = isTermin ? dotColor : (isFavorite(c.id) ? '#fbbf24' : 'var(--t-dim)');
            // Date column: due_date if set, else date prefix in title, else updated/created
            const dateStr = c.due_date
                || ((c.title || '').match(/^\d{4}-\d{2}-\d{2}/)?.[0])
                || (c.updated_at || c.created_at || '').substring(0, 10);
            // Tag chips (excluding termin/geburtstag — those are already
            // represented by the icon + dot on the left)
            const visibleTags = tags.filter(t => t !== 'termin' && t !== 'geburtstag');
            const tagsHtml = visibleTags.length
                ? `<span class="superview-tags">${visibleTags.slice(0, 4).map(t => `<span class="superview-tag">#${esc(t)}</span>`).join('')}${visibleTags.length > 4 ? `<span class="superview-tag superview-tag-more">+${visibleTags.length - 4}</span>` : ''}</span>`
                : '';
            const bucketHtml = c.bucket_name
                ? `<span class="superview-bucket"><i class="ph ph-folder"></i>${esc(c.bucket_name)}</span>`
                : '';
            return `<div class="superview-item" data-id="${c.id}">
                <span class="superview-dot" style="background:${dotColor}"></span>
                ${icon ? `<i class="ph ph-${icon} superview-icon" style="color:${iconColor}"></i>` : ''}
                <span class="superview-title">${esc(c.title)}</span>
                ${tagsHtml}
                ${bucketHtml}
                <span class="superview-date">${dateStr}</span>
            </div>`;
        }).join('') + '</div>';

        let hoverPopup = null, hoverTimer = null, hoverCloseTimer = null;
        function clearHover() {
            if (hoverTimer) { clearTimeout(hoverTimer); hoverTimer = null; }
            if (hoverCloseTimer) { clearTimeout(hoverCloseTimer); hoverCloseTimer = null; }
            if (hoverPopup) { hoverPopup.remove(); hoverPopup = null; }
        }
        function delayedClose() {
            hoverCloseTimer = setTimeout(clearHover, 150);
        }
        function cancelClose() {
            if (hoverCloseTimer) { clearTimeout(hoverCloseTimer); hoverCloseTimer = null; }
        }

        board.querySelectorAll('.superview-item[data-id]').forEach(el => {
            el.addEventListener('click', () => { clearHover(); if (state.boardSplitOpen) showBoardPreview(el.dataset.id); else window._openDetail(el.dataset.id); });
            el.addEventListener('dblclick', () => { clearHover(); const card = state.cards.find(c => c.id == el.dataset.id); if (card) window._openModal(card); });
            el.addEventListener('contextmenu', e => { e.preventDefault(); clearHover(); const card = state.cards.find(c => c.id == el.dataset.id); if (card) window._showContextMenu(e.clientX, e.clientY, card); });

            el.addEventListener('mouseenter', () => {
                cancelClose();
                if (hoverTimer) { clearTimeout(hoverTimer); hoverTimer = null; }
                hoverTimer = setTimeout(() => {
                    if (hoverPopup) { hoverPopup.remove(); hoverPopup = null; }
                    const card = state.cards.find(c => c.id == el.dataset.id);
                    if (!card) return;
                    const rect = el.getBoundingClientRect();

                    hoverPopup = document.createElement('div');
                    Object.assign(hoverPopup.style, {
                        position: 'fixed', zIndex: '100',
                        width: '280px',
                        filter: 'drop-shadow(0 8px 24px rgba(0,0,0,0.4))',
                    });
                    const textEnd = el.querySelector('.superview-title');
                    const textRect = textEnd ? textEnd.getBoundingClientRect() : rect;
                    const left = textRect.right + 8;
                    const useLeft = left + 290 < window.innerWidth;
                    hoverPopup.style.left = (useLeft ? left : textRect.left - 288) + 'px';
                    hoverPopup.style.top = Math.min(rect.top - 20, window.innerHeight - 320) + 'px';
                    hoverPopup.innerHTML = renderCardHtml(card);
                    hoverPopup.addEventListener('mouseenter', e => { e.stopPropagation(); cancelClose(); });
                    hoverPopup.addEventListener('mouseleave', delayedClose);
                    hoverPopup.addEventListener('mouseover', e => e.stopPropagation());
                    // Tag clicks inside hover card
                    hoverPopup.querySelectorAll('.tag-seg[data-tag]').forEach(seg => {
                        seg.addEventListener('click', e => {
                            e.stopPropagation();
                            const tag = seg.dataset.tag;
                            if (e.ctrlKey || e.metaKey) {
                                const idx = state.activeTags.indexOf(tag);
                                if (idx >= 0) state.activeTags.splice(idx, 1);
                                else state.activeTags.push(tag);
                            } else {
                                state.activeTags = state.activeTags.length === 1 && state.activeTags[0] === tag ? [] : [tag];
                            }
                            clearHover();
                            window._renderTagBar?.();
                            renderBoard();
                        });
                    });
                    // Click on hover card opens detail
                    hoverPopup.querySelector('.board-card')?.addEventListener('click', () => {
                        clearHover();
                        window._openDetail(card.id);
                    });
                    document.body.appendChild(hoverPopup);
                }, 400);
            });
            el.addEventListener('mouseleave', delayedClose);
        });

        const fc = $('footer-count');
        if (fc) fc.textContent = `${cards.length} cards · ${state.cards.length} total`;
        return;
    }

    board.style.display = '';
    board.style.alignItems = '';
    board.style.justifyContent = '';
    board.innerHTML = cards.map(c => renderCardHtml(c, inGroup, recent)).join('');

    bindCardEvents();

    // Re-apply the dragging ghost to any card whose drag is still in
    // flight. Polls (caldav, collab) call _reloadAll → renderBoard mid-
    // drag, which would otherwise wipe the visual ghost state without
    // the underlying drag operation noticing.
    if (draggingCardIds.size) {
        draggingCardIds.forEach(did => {
            board.querySelector(`[data-id="${did}"]`)?.classList.add('card-dragging');
        });
    }

    // Restore arrow-key card focus if the focused card is still rendered
    window._restoreCardFocus?.();

    // Restore selection state
    selectedIds.forEach(id => {
        const el = board.querySelector(`[data-id="${id}"]`);
        if (el) {
            el.classList.add('card-selected');
            if (!el.querySelector('.card-select-check')) {
                const check = document.createElement('div');
                check.className = 'card-select-check';
                el.appendChild(check);
            }
        }
    });
    updateSelectBar();

    // Footer count
    const fc = $('footer-count');
    if (fc) fc.textContent = `${cards.length} card${cards.length !== 1 ? 's' : ''} · ${state.cards.length} total`;

    // Refresh split preview if open
    if (state.boardSplitOpen && state.boardPreviewCardId) {
        const stillExists = state.cards.some(c => c.id == state.boardPreviewCardId);
        if (stillExists) showBoardPreview(state.boardPreviewCardId);
        else { state.boardPreviewCardId = null; resetBoardPreview(); }
    }

    // Notification banner
    renderNotifs();

    // Pulse locally-created cards in ANY bucket (1× subtle pulse).
    // These never enter unseenCardIds so they can't trigger the all-tab
    // dot — the user just made them, there's nothing "unseen" about it.
    // Journal entries are exempt from the pulse entirely — they're daily
    // log jottings, not "here's a new thing" moments, so the flash
    // reads as noise. Detection mirrors calendar.js isJournal: title
    // begins with YYYY-MM-DD, no termin/geburtstag tag, no caldav_uid,
    // and no " — <summary>" suffix (which denotes an appointment).
    if (newLocalIds.size) {
        for (const id of newLocalIds) state.recentlyCreatedIds.delete(id);
        const toPulse = new Set();
        for (const id of newLocalIds) {
            const card = state.cards.find(c => String(c.id) === id);
            if (!card) continue;
            const isJournal = /^\d{4}-\d{2}-\d{2}$/.test((card.title || '').trim())
                && !/^\d{4}-\d{2}-\d{2}\s*[—-]\s*.+/.test(card.title || '')
                && !card.caldav_uid
                && !(card.tags || '').split(',').some(t => t === 'termin' || t === 'geburtstag');
            if (!isJournal) toPulse.add(id);
        }
        if (toPulse.size) pulseCards(toPulse, 'card-pulse-local');
    }
    // Remote (relay-synced) cards: pulse 3× only when the user is on
    // the all view. On other views, the unseen ids accumulate and
    // the all-tab gets a dot until the user opens it.
    if (state.activeBucket === 'all' && state.unseenCardIds.size) {
        const remote = new Set(state.unseenCardIds);
        state.unseenCardIds.clear();
        pulseCards(remote, 'card-pulse-new');
    }
    decorateAllUnreadDot();
}

// ── Notification providers ──

// Upcoming events (birthdays + appointments)
addNotifProvider((settings) => {
    const today = new Date();
    const todayStr = today.toISOString().substring(0, 10);
    const todayLocal = new Date(today.getFullYear(), today.getMonth(), today.getDate());
    const lookahead = settings.lookahead || 3;
    const aheadStr = new Date(todayLocal.getTime() + lookahead * 86400000).toISOString().substring(0, 10);
    const items = [];

    for (const c of state.cards) {
        const tags = (c.tags || '').split(',');
        const isGeb = tags.includes('geburtstag');
        const isTermin = tags.includes('termin');
        if (isGeb && !settings.birthdays) continue;
        if (isTermin && !isGeb && !settings.termine) continue;
        if (!isGeb && !isTermin) continue;

        const m = (c.title || '').match(/^(\d{4}-\d{2}-\d{2})/);
        if (!m) continue;

        let eventDate = m[1];
        if (isGeb) eventDate = todayStr.substring(0, 4) + eventDate.substring(4);
        if (eventDate < todayStr || eventDate > aheadStr) continue;

        const name = c.title.replace(/^\d{4}-\d{2}-\d{2}\s*(?:—|-)\s*/, '') || c.title;
        const evParts = eventDate.split('-').map(Number);
        const evLocal = new Date(evParts[0], evParts[1] - 1, evParts[2]);
        const daysAway = Math.round((evLocal - todayLocal) / 86400000);
        const when = daysAway === 0 ? 'today' : daysAway === 1 ? 'tomorrow' : `in ${daysAway}d`;

        items.push({
            id: String(c.id),
            icon: isGeb ? 'cake' : 'calendar-dots',
            iconColor: isGeb ? '#fb7185' : 'var(--t-text)',
            label: name,
            when,
            sort: eventDate,
            type: isGeb ? 'birthday' : 'appointment',
            onClick: () => window._openDetail(c.id),
        });
    }
    return items;
});

// Due dates approaching or overdue
addNotifProvider((settings) => {
    const today = new Date();
    const todayStr = today.toISOString().substring(0, 10);
    const todayLocal = new Date(today.getFullYear(), today.getMonth(), today.getDate());
    const lookahead = settings.lookahead || 3;
    const aheadStr = new Date(todayLocal.getTime() + lookahead * 86400000).toISOString().substring(0, 10);
    const items = [];

    for (const c of state.cards) {
        if (!c.due_date) continue;

        // Overdue
        if (c.due_date < todayStr) {
            if (!settings.overdue) continue;
            items.push({
                id: 'due-' + c.id,
                icon: 'warning',
                iconColor: 'var(--t-danger)',
                label: c.title,
                when: 'overdue',
                sort: '0' + c.due_date,
                type: 'overdue',
                onClick: () => window._openDetail(c.id),
            });
        }
        // Upcoming
        else if (c.due_date <= aheadStr) {
            const evParts = c.due_date.split('-').map(Number);
            const evLocal = new Date(evParts[0], evParts[1] - 1, evParts[2]);
            const daysAway = Math.round((evLocal - todayLocal) / 86400000);
            const when = daysAway === 0 ? 'today' : daysAway === 1 ? 'tomorrow' : `in ${daysAway}d`;
            items.push({
                id: 'due-' + c.id,
                icon: 'clock-countdown',
                iconColor: daysAway === 0 ? 'var(--t-danger)' : 'var(--t-accent)',
                label: c.title,
                when,
                sort: c.due_date,
                type: 'due',
                onClick: () => window._openDetail(c.id),
            });
        }
    }
    return items;
});

// Overdue tasks (cards with unchecked todos past their date, no due_date set)
addNotifProvider((settings) => {
    if (!settings.overdue) return [];
    const todayStr = new Date().toISOString().substring(0, 10);
    const items = [];

    for (const c of state.cards) {
        if (c.due_date) continue; // handled by due-date provider above
        const m = (c.title || '').match(/^(\d{4}-\d{2}-\d{2})/);
        if (!m || m[1] >= todayStr) continue;
        if (!c.body || !/- \[ \]/.test(c.body)) continue;

        const name = c.title.replace(/^\d{4}-\d{2}-\d{2}\s*(?:—|-)\s*/, '') || c.title;
        items.push({
            id: 'overdue-' + c.id,
            icon: 'warning',
            iconColor: 'var(--t-danger)',
            label: name,
            when: 'overdue',
            sort: '0' + m[1],
            type: 'overdue',
            onClick: () => window._openDetail(c.id),
        });
    }
    return items;
});

// ── Group bar ──

function renderGroupBar(cards) {
    const bar = $('group-bar');
    if (!bar) return;
    if (state.activeGroup) {
        const parent = state.cards.find(c => c.id == state.activeGroup);
        bar.classList.remove('hidden');
        bar.dataset.groupId = String(state.activeGroup);
        bar.innerHTML = `
            <button id="group-back" class="flex items-center gap-1.5 px-2.5 py-1 text-xs border border-t-border text-t-muted hover:border-t-accent hover:text-t-accent transition-colors">
                <i class="ph ph-arrow-left text-sm"></i><span class="font-pixel text-[10px]">Back</span>
            </button>
            <i class="ph ph-stack text-t-accent text-sm"></i>
            <span class="font-pixel text-[10px] text-t-accent">${esc(parent?.title || 'group')}</span>
            <span class="font-pixel text-[9px] text-t-dim">${cards.length} cards</span>`;
        $('group-back')?.addEventListener('click', () => { state.activeGroup = null; renderBoard(); });
    } else {
        bar.classList.add('hidden');
        delete bar.dataset.groupId;
    }
}

// ── Group fan preview ──

let fanEl = null;
let fanTimer = null;
let fanGroupId = null;

function showFan(groupEl, parentId) {
    hideFan();
    const parent = state.cards.find(c => c.id == parentId);
    if (!parent) return;
    const children = getChildren(parentId);
    const all = children;
    const maxShow = 12;
    const visible = all.slice(0, maxShow);
    const hasMore = all.length > maxShow;

    fanGroupId = parentId;
    fanEl = document.createElement('div');
    fanEl.className = 'group-fan';
    const cols = Math.min(6, visible.length);
    fanEl.innerHTML = `<div class="group-fan-grid ${hasMore ? 'has-more' : ''}" style="--fan-cols:${cols}">${visible.map(c => {
        const img = firstImage(c.body);
        return `<div class="group-fan-card" data-fan-id="${c.id}">
            <div class="group-fan-bar" style="background:${c.color}"></div>
            ${img ? `<div class="group-fan-thumb" style="background-image:url('${img}')"></div>` : ''}
            <div class="group-fan-title font-pixel">${esc(c.title)}</div>
        </div>`;
    }).join('')}</div>`;

    document.body.appendChild(fanEl);

    // Position below the group card
    const rect = groupEl.getBoundingClientRect();
    const fanW = fanEl.offsetWidth;
    let left = rect.left + rect.width / 2 - fanW / 2;
    left = Math.max(8, Math.min(left, innerWidth - fanW - 8));
    let top = rect.bottom + 6;
    if (top + fanEl.offsetHeight > innerHeight - 40) top = rect.top - fanEl.offsetHeight - 6;
    fanEl.style.left = left + 'px';
    fanEl.style.top = top + 'px';

    fanEl.querySelectorAll('[data-fan-id]').forEach(card => {
        card.addEventListener('click', () => { hideFan(); window._openDetail(card.dataset.fanId); });
    });

    fanEl.addEventListener('mouseleave', hideFan);
}

function hideFan() {
    if (fanTimer) { clearTimeout(fanTimer); fanTimer = null; }
    if (fanEl) { fanEl.remove(); fanEl = null; }
    fanGroupId = null;
}

// ── Card event binding ──

function bindCardEvents() {
    // Single insertion-cursor element that lives inside #board (which is
    // `relative`) and gets repositioned by the card-level dragover handlers
    // below. Replaces the previous `.card-drop-before::before` /
    // `.card-drop-after::after` pseudo-elements so the cursor is a real
    // element in the gap rather than a sliver glued to the side of a tile.
    let cardDropCursor = board.querySelector('#card-drop-cursor');
    if (!cardDropCursor) {
        cardDropCursor = document.createElement('div');
        cardDropCursor.id = 'card-drop-cursor';
        board.appendChild(cardDropCursor);
    }
    function showCardDropCursor(targetEl, before) {
        // offsetLeft / offsetTop / offsetHeight are relative to the
        // offsetParent (#board) so the cursor positions correctly even
        // when #board is scrolled vertically.
        const x = before
            ? targetEl.offsetLeft - 6
            : targetEl.offsetLeft + targetEl.offsetWidth + 2;
        cardDropCursor.style.left = x + 'px';
        cardDropCursor.style.top = (targetEl.offsetTop + 8) + 'px';
        cardDropCursor.style.height = (targetEl.offsetHeight - 16) + 'px';
        cardDropCursor.style.display = 'block';
    }
    function hideCardDropCursor() {
        cardDropCursor.style.display = 'none';
    }
    // Expose so the global dragend handler (defined outside this function)
    // can hide the cursor too.
    board._hideCardDropCursor = hideCardDropCursor;

    board.querySelectorAll('[data-group]').forEach(badge => {
        badge.addEventListener('click', e => { e.stopPropagation(); state.activeGroup = badge.dataset.group; renderBoard(); });
    });

    board.querySelectorAll('.tag-seg[data-tag]').forEach(seg => {
        seg.addEventListener('click', e => {
            e.stopPropagation();
            const tag = seg.dataset.tag;
            if (e.ctrlKey || e.metaKey) {
                const idx = state.activeTags.indexOf(tag);
                if (idx >= 0) state.activeTags.splice(idx, 1);
                else state.activeTags.push(tag);
            } else {
                state.activeTags = state.activeTags.length === 1 && state.activeTags[0] === tag ? [] : [tag];
            }
            window._renderTagBar?.();
            renderBoard();
        });
        seg.addEventListener('contextmenu', async e => {
            e.preventDefault();
            e.stopPropagation();
            const tag = seg.dataset.tag;
            const cardEl = seg.closest('[data-id]');
            if (!cardEl) return;
            const card = state.cards.find(c => c.id == cardEl.dataset.id);
            if (!card) return;
            const newBody = (card.body || '').replace(new RegExp('\\s*#' + tag.replace(/[.*+?^${}()|[\]\\\/]/g, '\\$&') + '(?=\\s|$)', 'm'), '');
            await api(`api/cards/${card.id}`, { method: 'PATCH', body: { body: newBody } });
            await window._reloadAll?.();
        });
    });

    board.querySelectorAll('[data-id]').forEach(el => {
        const id = el.dataset.id;
        const children = getChildren(id);
        const isGroup = children.length > 0 && !state.activeGroup;
        let clickTimer = null;

        // Group fan on long hover
        if (isGroup) {
            el.addEventListener('mouseenter', () => {
                fanTimer = setTimeout(() => showFan(el, id), 800);
            });
            el.addEventListener('mouseleave', e => {
                // Don't hide if moving to the fan itself
                if (fanEl && fanEl.contains(e.relatedTarget)) return;
                if (fanTimer) { clearTimeout(fanTimer); fanTimer = null; }
                // Delay hiding to allow moving to fan
                if (fanEl && fanGroupId == id) {
                    setTimeout(() => { if (fanGroupId == id && fanEl && !fanEl.matches(':hover')) hideFan(); }, 200);
                }
            });
        }

        el.addEventListener('click', (e) => {
            if (e.ctrlKey || e.metaKey) { e.preventDefault(); toggleSelect(id); return; }
            if (clickTimer) return;
            clickTimer = setTimeout(() => {
                clickTimer = null;
                if (state.boardSplitOpen) { showBoardPreview(id); }
                else if (localStorage.getItem('hyprcrd-click-action') === 'edit') {
                    const card = state.cards.find(c => c.id == id);
                    if (card) window._openModal(card);
                }
                else { window._openDetail(id); }
            }, 200);
        });
        el.addEventListener('dblclick', e => {
            e.preventDefault();
            if (clickTimer) { clearTimeout(clickTimer); clickTimer = null; }
            const card = state.cards.find(c => c.id == id);
            if (card) window._openModal(card);
        });
        el.addEventListener('contextmenu', e => {
            e.preventDefault(); e.stopPropagation();
            const card = state.cards.find(c => c.id == id);
            if (card) window._showContextMenu(e.clientX, e.clientY, card);
        });

        // Drag & drop
        el.addEventListener('dragstart', e => {
            e.dataTransfer.setData('text/plain', id);
            e.dataTransfer.effectAllowed = 'move';
            activeDragEl = el;

            // Determine all dragged cards (selected or just this one)
            const isMulti = selectedIds.has(String(id)) && selectedIds.size > 1;
            const dragIds = isMulti ? [...selectedIds] : [String(id)];

            // Ghost all dragged cards + remember the ids so a poll-driven
            // re-render can re-apply the ghost state.
            draggingCardIds.clear();
            dragIds.forEach(did => {
                draggingCardIds.add(String(did));
                board.querySelector(`[data-id="${did}"]`)?.classList.add('card-dragging');
            });

            // Hide native drag image
            const empty = document.createElement('div');
            empty.style.width = '1px'; empty.style.height = '1px'; empty.style.opacity = '0.01';
            document.body.appendChild(empty);
            e.dataTransfer.setDragImage(empty, 0, 0);
            setTimeout(() => empty.remove(), 0);

            // Create stacked ghost
            const rect = el.getBoundingClientRect();
            const container = document.createElement('div');
            container.style.cssText = `position:fixed;z-index:9998;pointer-events:none;transition:opacity 0.12s;opacity:0.5;`;
            container._offsetX = e.clientX - rect.left;
            container._offsetY = e.clientY - rect.top;

            if (isMulti) {
                // Stack effect: offset layers behind
                const count = Math.min(dragIds.length, 4);
                for (let i = count - 1; i >= 1; i--) {
                    const layer = document.createElement('div');
                    layer.style.cssText = `position:absolute;top:${i * 4}px;left:${i * 4}px;width:${rect.width}px;height:${rect.height}px;background:var(--t-surface);border:1px solid var(--t-border);border-radius:inherit;opacity:${0.3 + (count - i) * 0.15};`;
                    container.appendChild(layer);
                }
                // Badge
                const badge = document.createElement('div');
                badge.textContent = dragIds.length;
                badge.style.cssText = `position:absolute;top:-6px;right:-6px;min-width:20px;height:20px;border-radius:10px;background:var(--t-accent);color:var(--t-bg);font-size:10px;font-weight:700;display:flex;align-items:center;justify-content:center;padding:0 6px;z-index:5;font-family:var(--t-font-pixel,'Silkscreen',cursive);`;
                container.appendChild(badge);
            }

            const clone = el.cloneNode(true);
            clone.style.cssText = `position:relative;width:${rect.width}px;`;
            clone.querySelector('.card-select-check')?.remove();
            container.appendChild(clone);

            container.style.left = (e.clientX - container._offsetX) + 'px';
            container.style.top = (e.clientY - container._offsetY) + 'px';
            document.body.appendChild(container);
            dragGhost = container;
        });
        el.addEventListener('dragend', () => {
            // Remove ghost class from all dragged cards
            board.querySelectorAll('.card-dragging').forEach(c => c.classList.remove('card-dragging'));
            draggingCardIds.clear();
            activeDragEl = null;
            if (dragGhost) { dragGhost.remove(); dragGhost = null; }
            board.querySelectorAll('.card-drop-group').forEach(x => x.classList.remove('card-drop-group'));
            hideCardDropCursor();
        });
        el.addEventListener('dragover', e => {
            e.preventDefault(); e.dataTransfer.dropEffect = 'move';
            const rect = el.getBoundingClientRect();
            const edge = rect.width * 0.25, x = e.clientX - rect.left;
            // Three zones (matching the bucket fix): left 25% / right 25%
            // → insertion cursor in the gap, center 50% → group highlight
            // on the target card.
            const isBefore = x < edge;
            const isAfter  = x > rect.width - edge;
            const isGroup  = !isBefore && !isAfter;
            el.classList.toggle('card-drop-group', isGroup);
            if (isGroup) {
                hideCardDropCursor();
            } else {
                showCardDropCursor(el, isBefore);
            }
        });
        el.addEventListener('dragleave', () => {
            el.classList.remove('card-drop-group');
            // Don't hide the cursor here — the next card's dragover will
            // reposition it. Hiding on dragleave makes the cursor flicker
            // as the mouse moves across adjacent cards. Final cleanup
            // happens on dragend.
        });
        el.addEventListener('drop', e => handleCardDrop(e, el, id));
    });
}

// ── Card drop handler ──

async function handleCardDrop(e, el, targetId) {
    e.preventDefault();
    // Recompute the drop zone from the mouse position rather than reading
    // it back from CSS classes — the new cursor-based dragover doesn't
    // tag the target with `.card-drop-before` / `.card-drop-after` anymore,
    // only `.card-drop-group` for the center hover state.
    const rect = el.getBoundingClientRect();
    const edge = rect.width * 0.25;
    const x = e.clientX - rect.left;
    const wasGroup = !(x < edge) && !(x > rect.width - edge);
    const wasBefore = x < edge;
    el.classList.remove('card-drop-group');
    board.querySelector('#card-drop-cursor')?.style.setProperty('display', 'none');
    const dragId = e.dataTransfer.getData('text/plain');
    if (!dragId || dragId === targetId) return;

    if (wasGroup) {
        const prev = snapshotCard(state.cards.find(c => c.id == dragId));
        pushCardEdit('group', dragId, { parent_id: prev.parent_id || null });
        await api(`api/cards/${dragId}`, { method: 'PATCH', body: { parent_id: targetId } });
        await window._reloadAll();
        return;
    }

    // Compute new order — must mirror renderBoard's filtering
    let filtered;
    if (state.activeGroup) {
        const parent = state.cards.find(c => c.id == state.activeGroup);
        filtered = parent ? sortedCards([parent, ...getChildren(parent.id)]) : [];
    } else {
        const root = state.cards.filter(c => !c.parent_id);
        if (state.activeBucket === 'favorites') {
            const favs = getFavorites();
            filtered = sortedCards(root.filter(c => favs.includes(String(c.id))));
        } else if (state.activeBucket === 'journal') {
            filtered = root.filter(c => /^\d{4}-\d{2}-\d{2}/.test(c.title));
            filtered.sort((a, b) => b.title.localeCompare(a.title));
        } else if (state.activeBucket === 'none') {
            filtered = sortedCards(root.filter(c => !c.bucket_id && !/^\d{4}-\d{2}-\d{2}/.test(c.title)));
        } else if (state.activeBucket !== 'all' && state.activeBucket !== 'current') {
            filtered = sortedCards(root.filter(c => c.bucket_id == state.activeBucket));
        } else {
            filtered = sortedCards(root);
        }
    }
    const ids = filtered.map(c => String(c.id)).filter(i => i !== String(dragId));
    ids.splice(wasBefore ? ids.indexOf(String(targetId)) : ids.indexOf(String(targetId)) + 1, 0, String(dragId));

    // Ungroup if dragging child to main board
    const dragCard = state.cards.find(c => c.id == dragId);
    if (!state.activeGroup && dragCard?.parent_id) {
        await api(`api/cards/${dragId}`, { method: 'PATCH', body: { parent_id: null } });
    }

    // Undo snapshot before reorder
    pushReorder('reorder', filtered);

    // FLIP capture
    const oldRects = {};
    board.querySelectorAll('[data-id]').forEach(c => { oldRects[c.dataset.id] = c.getBoundingClientRect(); });

    await Promise.all(ids.map((cid, i) => api(`api/cards/${cid}`, { method: 'PATCH', body: { position: i } })));

    // Swap group parent if needed
    if (state.activeGroup && ids[0] !== String(state.activeGroup)) {
        const newP = ids[0], oldP = String(state.activeGroup);
        await api(`api/cards/${newP}`, { method: 'PATCH', body: { parent_id: null } });
        await api(`api/cards/${oldP}`, { method: 'PATCH', body: { parent_id: newP } });
        for (const cid of ids.slice(1)) { if (cid !== oldP) await api(`api/cards/${cid}`, { method: 'PATCH', body: { parent_id: newP } }); }
        state.activeGroup = newP;
    }

    state.sortMode = 'manual';
    localStorage.setItem('hyprcrd-sort', 'manual');
    updateSortUI();
    await window._reloadAll();

    // FLIP animate
    board.querySelectorAll('[data-id]').forEach(card => {
        const old = oldRects[card.dataset.id];
        if (!old) return;
        const nw = card.getBoundingClientRect();
        const dx = old.left - nw.left, dy = old.top - nw.top;
        if (!dx && !dy) return;
        card.style.transition = 'none';
        card.style.transform = `translate(${dx}px,${dy}px)`;
        requestAnimationFrame(() => { card.style.transition = 'transform 0.25s ease'; card.style.transform = ''; });
    });
}

// ── Box select ──

let boxEl = null;
let boxStart = null;
let boxActive = false;

board.addEventListener('mousedown', e => {
    // Only start on board background (not on cards or interactive elements)
    if (e.button !== 0 || e.target !== board) return;
    if (e.shiftKey) return;

    const additive = e.ctrlKey || e.metaKey;
    const priorSelection = additive ? new Set(selectedIds) : null;
    boxStart = { x: e.clientX, y: e.clientY, scrollTop: board.scrollTop };
    boxActive = false;

    const onMove = ev => {
        const dx = ev.clientX - boxStart.x;
        const dy = ev.clientY - boxStart.y;
        if (!boxActive && Math.abs(dx) < 5 && Math.abs(dy) < 5) return;

        if (!boxActive) {
            boxActive = true;
            if (!additive) clearSelection();
            // Mark the selection as bulk so the join action knows to use
            // the longest-title strategy instead of first-clicked.
            state.selectionWasBulk = true;
            boxEl = document.createElement('div');
            boxEl.className = 'box-select';
            board.appendChild(boxEl);
        }

        const boardRect = board.getBoundingClientRect();
        const scrollDelta = board.scrollTop - boxStart.scrollTop;
        const x1 = boxStart.x - boardRect.left;
        const y1 = boxStart.y - boardRect.top + board.scrollTop;
        const x2 = ev.clientX - boardRect.left;
        const y2 = ev.clientY - boardRect.top + board.scrollTop;

        const left = Math.min(x1, x2);
        const top = Math.min(y1, y2);
        const width = Math.abs(x2 - x1);
        const height = Math.abs(y2 - y1);

        boxEl.style.left = left + 'px';
        boxEl.style.top = top + 'px';
        boxEl.style.width = width + 'px';
        boxEl.style.height = height + 'px';

        // Check intersections
        const selRect = { left, top, right: left + width, bottom: top + height };
        board.querySelectorAll('[data-id]').forEach(card => {
            const cr = card.getBoundingClientRect();
            const cardRect = {
                left: cr.left - boardRect.left,
                top: cr.top - boardRect.top + board.scrollTop,
                right: cr.right - boardRect.left,
                bottom: cr.bottom - boardRect.top + board.scrollTop,
            };
            const intersects = !(cardRect.right < selRect.left || cardRect.left > selRect.right || cardRect.bottom < selRect.top || cardRect.top > selRect.bottom);
            const id = card.dataset.id;
            const wasPrior = priorSelection?.has(id);
            if (additive) {
                // Toggle: prior selected + hit by box → deselect; not prior + hit → select
                const shouldBeSelected = intersects ? !wasPrior : !!wasPrior;
                if (shouldBeSelected && !selectedIds.has(id)) toggleSelect(id);
                else if (!shouldBeSelected && selectedIds.has(id)) toggleSelect(id);
            } else {
                if (intersects && !selectedIds.has(id)) toggleSelect(id);
                else if (!intersects && selectedIds.has(id)) toggleSelect(id);
            }
        });
    };

    const onUp = () => {
        document.removeEventListener('mousemove', onMove);
        document.removeEventListener('mouseup', onUp);
        if (boxEl) { boxEl.remove(); boxEl = null; }
        if (!boxActive && selectedIds.size) clearSelection();
        boxStart = null;
        boxActive = false;
    };

    document.addEventListener('mousemove', onMove);
    document.addEventListener('mouseup', onUp);
});