fix: adjusted drag and drop

resources/js/composables/useBoardDrag.ts

@@ -0,0 +1,154 @@
+import { computed, onMounted, onUnmounted, ref, shallowRef } from 'vue';
+import type { TicketModel } from '@/types/models/ticket-model';
+
+/** Pointer capture keeps mouse, pen and touch drags on the same code path. */
+export function useBoardDrag(options: {
+    canStart: (ticket: TicketModel) => boolean;
+    drop: (ticket: TicketModel, columnId: number) => void;
+}) {
+    const ticket = shallowRef<TicketModel | null>(null);
+    const active = ref(false);
+    const x = ref(0);
+    const y = ref(0);
+    const columnId = ref<number | null>(null);
+    let pointerId: number | null = null;
+    let handle: HTMLElement | null = null;
+    let startX = 0;
+    let startY = 0;
+    let frame = 0;
+
+    const draggedTicket = computed(() => (active.value ? ticket.value : null));
+
+    function locateTarget(): void {
+        const target = document
+            .elementFromPoint(x.value, y.value)
+            ?.closest<HTMLElement>('[data-board-drop-column]');
+        columnId.value = target ? Number(target.dataset.boardDropColumn) : null;
+    }
+
+    function scroll(): void {
+        if (!active.value) {
+            return;
+        }
+        const element = document.elementFromPoint(x.value, y.value);
+        const region = element?.closest<HTMLElement>(
+            '[data-board-drag-scroll]',
+        );
+        if (region) {
+            const bounds = region.getBoundingClientRect();
+            const left = Math.max(0, bounds.left);
+            const right = Math.min(window.innerWidth, bounds.right);
+            const delta =
+                x.value < left + 44 ? -10 : x.value > right - 44 ? 10 : 0;
+            region.scrollLeft += delta;
+        }
+        if (!element?.closest('[data-board-mobile-targets]')) {
+            const delta =
+                y.value < 64 ? -10 : y.value > window.innerHeight - 64 ? 10 : 0;
+            window.scrollBy(0, delta);
+        }
+        locateTarget();
+        frame = requestAnimationFrame(scroll);
+    }
+
+    function cancel(): void {
+        const previousPointer = pointerId;
+        pointerId = null;
+        active.value = false;
+        ticket.value = null;
+        columnId.value = null;
+        cancelAnimationFrame(frame);
+        if (
+            previousPointer !== null &&
+            handle?.hasPointerCapture(previousPointer)
+        ) {
+            handle.releasePointerCapture(previousPointer);
+        }
+        handle = null;
+    }
+
+    function start(event: PointerEvent, source: TicketModel): void {
+        if (
+            pointerId !== null ||
+            !event.isPrimary ||
+            event.button !== 0 ||
+            !options.canStart(source)
+        ) {
+            return;
+        }
+        handle = event.currentTarget as HTMLElement;
+        handle.focus({ preventScroll: true });
+        handle.setPointerCapture(event.pointerId);
+        pointerId = event.pointerId;
+        ticket.value = source;
+        startX = x.value = event.clientX;
+        startY = y.value = event.clientY;
+    }
+
+    function move(event: PointerEvent): void {
+        if (event.pointerId !== pointerId) {
+            return;
+        }
+        x.value = event.clientX;
+        y.value = event.clientY;
+        if (
+            !active.value &&
+            Math.hypot(x.value - startX, y.value - startY) >= 6
+        ) {
+            active.value = true;
+            frame = requestAnimationFrame(scroll);
+        }
+        if (active.value) {
+            event.preventDefault();
+            locateTarget();
+        }
+    }
+
+    function finish(event: PointerEvent): void {
+        if (event.pointerId !== pointerId) {
+            return;
+        }
+        x.value = event.clientX;
+        y.value = event.clientY;
+        locateTarget();
+        const source = draggedTicket.value;
+        const target = columnId.value;
+        cancel();
+        if (source && target !== null) {
+            options.drop(source, target);
+        }
+    }
+
+    function cancelPointer(event: PointerEvent): void {
+        if (event.pointerId === pointerId) {
+            cancel();
+        }
+    }
+
+    function keydown(event: KeyboardEvent): void {
+        if (event.key === 'Escape' && pointerId !== null) {
+            event.preventDefault();
+            cancel();
+        }
+    }
+
+    onMounted(() => {
+        document.addEventListener('pointermove', move, { passive: false });
+        document.addEventListener('pointerup', finish);
+        document.addEventListener('pointercancel', cancelPointer);
+        document.addEventListener('lostpointercapture', cancelPointer);
+        document.addEventListener('keydown', keydown);
+        window.addEventListener('blur', cancel);
+    });
+    onUnmounted(() => {
+        cancel();
+        document.removeEventListener('pointermove', move);
+        document.removeEventListener('pointerup', finish);
+        document.removeEventListener('pointercancel', cancelPointer);
+        document.removeEventListener('lostpointercapture', cancelPointer);
+        document.removeEventListener('keydown', keydown);
+        window.removeEventListener('blur', cancel);
+    });
+
+    return { draggedTicket, columnId, x, y, start, cancel };
+}

resources/js/locales/en.ts

@@ -18,6 +18,17 @@ export const en = {
     'board.updateStatus': 'Update status',
     'board.updatingStatus': 'Updating…',
     'board.noMoves': 'No allowed moves',
+    'board.drag': 'Drag to move',
+    'board.dragTicket': 'Drag {key} to change status',
+    'board.dragHint':
+        'Drag a handle to a highlighted column, or use the status controls. Press Escape to cancel.',
+    'board.dropHint': 'Drop on a column. Hold near an edge to scroll.',
+    'board.dragging':
+        'Dragging {key}. Drop on an allowed column or press Escape to cancel.',
+    'board.chooseStatus': 'Choose a destination status',
+    'board.chooseStatusDescription':
+        'More than one status is available for {key} in this column.',
+    'board.targetStatus': 'Destination status',
     'board.noMovesDescription':
         'This status does not allow moving anywhere else.',
     'projectCreation.title': 'Create a project',

resources/js/pages/projects/Board.vue

@@ -1,13 +1,24 @@
 <script setup lang="ts">
-import { Form, Head, Link } from '@inertiajs/vue3';
-import { ArrowLeft, ListTodo, Plus } from 'lucide-vue-next';
-import { computed, ref, watch } from 'vue';
+import { Form, Head, Link, useForm } from '@inertiajs/vue3';
+import { ArrowLeft, GripVertical, ListTodo, Plus } from 'lucide-vue-next';
+import { computed, nextTick, ref, watch } from 'vue';
 import { move } from '@/actions/App/Http/Controllers/ProjectBoardController';
 import FeedbackState from '@/components/FeedbackState.vue';
+import FormFeedback from '@/components/FormFeedback.vue';
 import InputError from '@/components/InputError.vue';
 import { TicketCard } from '@/components/tickets';
 import { Badge } from '@/components/ui/badge';
 import { Button } from '@/components/ui/button';
+import {
+    Dialog,
+    DialogContent,
+    DialogDescription,
+    DialogFooter,
+    DialogHeader,
+    DialogTitle,
+} from '@/components/ui/dialog';
+import { useBoardDrag } from '@/composables/useBoardDrag';
+import { useFormProtection } from '@/composables/useFormProtection';
 import { useLocalization } from '@/composables/useLocalization';
 import AppLayout from '@/layouts/AppLayout.vue';
 import { ticketStatusLabel } from '@/lib/tickets';
@@ -67,6 +78,140 @@ const allowedTargetStatuses = (ticket: TicketModel) =>
     (ticket.ticket_status?.allowed_target_statuses ?? []).filter(
         (status) => status.id !== ticket.ticket_status_id,
     );
+
+const moveForm = useForm({ ticket_status_id: 0, redirect_to: 'board' });
+const feedback = useFormProtection(moveForm, { isDirty: () => false });
+const menuPending = ref<number | null>(null);
+const busy = computed(() => moveForm.processing || menuPending.value !== null);
+const choice = ref<{ ticketId: number; columnId: number } | null>(null);
+const lastMove = ref<{ ticketId: number; statusId: number } | null>(null);
+const findTicket = (id: number) =>
+    props.boardColumns
+        .flatMap((column) => column.tickets ?? [])
+        .find((ticket) => ticket.id === id);
+const targetsForColumn = (ticket: TicketModel, columnId: number) => {
+    const statusIds =
+        props.boardColumns
+            .find((column) => column.id === columnId)
+            ?.ticket_statuses?.map((status) => status.id) ?? [];
+    return allowedTargetStatuses(ticket).filter((status) =>
+        statusIds.includes(status.id),
+    );
+};
+const choiceTicket = computed(() =>
+    choice.value ? findTicket(choice.value.ticketId) : undefined,
+);
+const choiceTargets = computed(() =>
+    choice.value && choiceTicket.value
+        ? targetsForColumn(choiceTicket.value, choice.value.columnId)
+        : [],
+);
+const choiceOpen = computed({
+    get: () => choice.value !== null,
+    set: (open: boolean) => {
+        if (!open) {
+            choice.value = null;
+        }
+    },
+});
+
+function submitMove(ticketId: number, statusId: number): void {
+    const ticket = findTicket(ticketId);
+    if (
+        busy.value ||
+        !props.canEditTickets ||
+        !ticket ||
+        !allowedTargetStatuses(ticket).some((status) => status.id === statusId)
+    ) {
+        return;
+    }
+    lastMove.value = { ticketId, statusId };
+    moveForm.ticket_status_id = statusId;
+    moveForm.clearErrors();
+    feedback.submit(move({ project: props.project.id, ticket: ticketId }), {
+        errorBag: `board-ticket-${ticketId}`,
+        preserveScroll: true,
+        onSuccess: async () => {
+            const destination = props.boardColumns.find((column) =>
+                column.ticket_statuses?.some(
+                    (status) => status.id === statusId,
+                ),
+            );
+            if (destination) {
+                selectedColumnId.value = destination.id;
+            }
+            await nextTick();
+            document
+                .getElementById(`ticket-status-${ticketId}`)
+                ?.focus({ preventScroll: true });
+        },
+    });
+}
+
+function dropTicket(ticket: TicketModel, columnId: number): void {
+    const current = findTicket(ticket.id);
+    if (!current || busy.value || !props.canEditTickets) {
+        return;
+    }
+    const targets = targetsForColumn(current, columnId);
+    if (targets.length === 1) {
+        submitMove(current.id, targets[0].id);
+    } else if (targets.length > 1) {
+        moveForm.ticket_status_id = targets[0].id;
+        choice.value = { ticketId: current.id, columnId };
+    }
+}
+
+const {
+    draggedTicket,
+    columnId: dropColumnId,
+    x: dragX,
+    y: dragY,
+    start: startDrag,
+    cancel: cancelDrag,
+} = useBoardDrag({
+    canStart: (ticket) =>
+        props.canEditTickets &&
+        !busy.value &&
+        !choice.value &&
+        allowedTargetStatuses(ticket).length > 0,
+    drop: dropTicket,
+});
+const canDrop = (columnId: number) =>
+    !!draggedTicket.value &&
+    targetsForColumn(draggedTicket.value, columnId).length > 0;
+const dropClasses = (columnId: number) =>
+    !draggedTicket.value
+        ? {}
+        : {
+              'border-primary border-dashed': canDrop(columnId),
+              'ring-2 ring-primary bg-primary/10':
+                  canDrop(columnId) && dropColumnId.value === columnId,
+              'opacity-40': !canDrop(columnId),
+          };
+function confirmMove(): void {
+    if (
+        !choice.value ||
+        !choiceTargets.value.some(
+            (status) => status.id === moveForm.ticket_status_id,
+        )
+    ) {
+        return;
+    }
+    const ticketId = choice.value.ticketId;
+    choice.value = null;
+    submitMove(ticketId, moveForm.ticket_status_id);
+}
+function focusStatus(ticketId: number): void {
+    document.getElementById(`ticket-status-${ticketId}`)?.focus();
+}
+watch(
+    () => [props.project.id, props.boardColumns, props.canEditTickets],
+    () => {
+        cancelDrag();
+        choice.value = null;
+    },
+);
 </script>
 
 <template>
@@ -130,6 +275,13 @@ const allowedTargetStatuses = (ticket: TicketModel) =>
             </header>
 
             <FeedbackState v-if="status" state="success" :title="status" />
+            <FormFeedback
+                :state="feedback.state.value"
+                :description="moveForm.errors.ticket_status_id"
+                @retry="
+                    lastMove && submitMove(lastMove.ticketId, lastMove.statusId)
+                "
+            />
             <FeedbackState
                 v-if="columns.length === 0"
                 state="empty"
@@ -168,10 +320,18 @@ const allowedTargetStatuses = (ticket: TicketModel) =>
                 >
                     {{ t('board.scrollHint') }}
                 </p>
+                <p
+                    v-if="canEditTickets"
+                    id="board-drag-hint"
+                    class="text-caption text-muted-foreground"
+                >
+                    {{ t('board.dragHint') }}
+                </p>
                 <section
                     :aria-label="t('board.columns')"
                     aria-describedby="board-scroll-hint"
                     tabindex="0"
+                    data-board-drag-scroll
                     class="gap-column focus-visible:ring-ring/35 flex min-w-0 rounded-md pb-2 focus-visible:outline-none focus-visible:ring-2 md:overflow-x-auto md:overscroll-x-contain"
                 >
                     <section
@@ -179,9 +339,11 @@ const allowedTargetStatuses = (ticket: TicketModel) =>
                         :id="`board-column-${column.id}`"
                         :key="`${project.id}-${column.id}`"
                         :aria-labelledby="`board-column-title-${column.id}`"
+                        :data-board-drop-column="column.id"
                         :class="[
                             'bg-muted/40 gap-column w-full min-w-0 shrink-0 flex-col self-stretch rounded-md border p-3 md:flex md:w-80',
                             selectedColumnId === column.id ? 'flex' : 'hidden',
+                            dropClasses(column.id),
                         ]"
                     >
                         <header
@@ -250,6 +412,10 @@ const allowedTargetStatuses = (ticket: TicketModel) =>
                                     v-for="ticket in group.tickets"
                                     :key="ticket.id"
                                     class="min-w-0"
+                                    :class="{
+                                        'opacity-50':
+                                            draggedTicket?.id === ticket.id,
+                                    }"
                                 >
                                     <TicketCard
                                         :project-id="project.id"
@@ -260,6 +426,36 @@ const allowedTargetStatuses = (ticket: TicketModel) =>
                                             v-if="canEditTickets"
                                             #actions
                                         >
+                                            <Button
+                                                type="button"
+                                                variant="ghost"
+                                                class="mb-2 w-full cursor-grab touch-none select-none active:cursor-grabbing"
+                                                :disabled="
+                                                    busy ||
+                                                    allowedTargetStatuses(
+                                                        ticket,
+                                                    ).length === 0
+                                                "
+                                                :aria-label="
+                                                    t('board.dragTicket', {
+                                                        key: ticket.ticket_key,
+                                                    })
+                                                "
+                                                aria-describedby="board-drag-hint"
+                                                @pointerdown="
+                                                    startDrag($event, ticket)
+                                                "
+                                                @click.prevent
+                                                @keydown.enter.prevent="
+                                                    focusStatus(ticket.id)
+                                                "
+                                                @keydown.space.prevent="
+                                                    focusStatus(ticket.id)
+                                                "
+                                                ><GripVertical
+                                                    aria-hidden="true"
+                                                />{{ t('board.drag') }}</Button
+                                            >
                                             <Form
                                                 v-bind="
                                                     move.form({
@@ -272,6 +468,12 @@ const allowedTargetStatuses = (ticket: TicketModel) =>
                                                 :options="{
                                                     preserveScroll: true,
                                                 }"
+                                                :on-before="
+                                                    () =>
+                                                        !busy && !draggedTicket
+                                                "
+                                                @start="menuPending = ticket.id"
+                                                @finish="menuPending = null"
                                                 class="grid min-w-0 gap-2"
                                             >
                                                 <input
@@ -292,6 +494,7 @@ const allowedTargetStatuses = (ticket: TicketModel) =>
                                                     :id="`ticket-status-${ticket.id}`"
                                                     name="ticket_status_id"
                                                     :disabled="
+                                                        busy ||
                                                         processing ||
                                                         allowedTargetStatuses(
                                                             ticket,
@@ -345,6 +548,7 @@ const allowedTargetStatuses = (ticket: TicketModel) =>
                                                     type="submit"
                                                     variant="outline"
                                                     :disabled="
+                                                        busy ||
                                                         processing ||
                                                         allowedTargetStatuses(
                                                             ticket,
@@ -381,6 +585,94 @@ const allowedTargetStatuses = (ticket: TicketModel) =>
                     </section>
                 </section>
             </template>
+            <div
+                v-if="draggedTicket"
+                class="bg-card fixed inset-x-0 bottom-0 z-40 border-t p-3 shadow-lg md:hidden"
+                data-board-mobile-targets
+            >
+                <p class="text-caption mb-2 font-semibold">
+                    {{ t('board.dropHint') }}
+                </p>
+                <div class="flex gap-2 overflow-x-auto" data-board-drag-scroll>
+                    <div
+                        v-for="column in columns"
+                        :key="column.id"
+                        :data-board-drop-column="column.id"
+                        :class="dropClasses(column.id)"
+                        class="text-body flex min-h-20 w-36 shrink-0 items-center rounded-md border p-3"
+                    >
+                        {{ column.name }}
+                    </div>
+                </div>
+            </div>
+            <div
+                v-if="draggedTicket"
+                aria-hidden="true"
+                class="bg-primary text-primary-foreground pointer-events-none fixed z-50 max-w-48 rounded-md px-3 py-2 shadow-lg"
+                :style="{
+                    left: `${Math.max(0, dragX - 80)}px`,
+                    top: `${Math.max(0, dragY - 56)}px`,
+                }"
+            >
+                {{ draggedTicket.ticket_key }}
+            </div>
+            <p class="sr-only" aria-live="polite">
+                {{
+                    draggedTicket
+                        ? t('board.dragging', { key: draggedTicket.ticket_key })
+                        : ''
+                }}
+            </p>
+            <Dialog v-model:open="choiceOpen">
+                <DialogContent>
+                    <DialogHeader>
+                        <DialogTitle>{{ t('board.chooseStatus') }}</DialogTitle>
+                        <DialogDescription>{{
+                            t('board.chooseStatusDescription', {
+                                key: choiceTicket?.ticket_key ?? '',
+                            })
+                        }}</DialogDescription>
+                    </DialogHeader>
+                    <form class="grid gap-4" @submit.prevent="confirmMove">
+                        <label
+                            for="board-drop-status"
+                            class="text-body font-semibold"
+                            >{{ t('board.targetStatus') }}</label
+                        >
+                        <select
+                            id="board-drop-status"
+                            v-model="moveForm.ticket_status_id"
+                            class="border-input bg-card text-body min-h-control focus-visible:ring-ring/35 w-full rounded-md border px-3 py-2 focus-visible:outline-none focus-visible:ring-2"
+                        >
+                            <option
+                                v-for="target in choiceTargets"
+                                :key="target.id"
+                                :value="target.id"
+                            >
+                                {{
+                                    ticketStatusLabel(
+                                        target,
+                                        t('tickets.noStatus'),
+                                    )
+                                }}
+                            </option>
+                        </select>
+                        <DialogFooter>
+                            <Button
+                                type="button"
+                                variant="outline"
+                                @click="choiceOpen = false"
+                                >{{ t('common.cancel') }}</Button
+                            >
+                            <Button
+                                type="submit"
+                                :disabled="busy || choiceTargets.length === 0"
+                                >{{ t('board.updateStatus') }}</Button
+                            >
+                        </DialogFooter>
+                    </form>
+                </DialogContent>
+            </Dialog>
         </div>
     </AppLayout>
 </template>

tests/Feature/Projects/ProjectBoardControllerTest.php

@@ -212,6 +212,19 @@ class ProjectBoardControllerTest extends TestCase
             'entry_type' => 'status_changed',
             'summary' => 'Moved from Todo to Done.',
         ]);
+
+        $this->assertSame(1, $ticket->worklogEntries()->count());
+
+        $this->actingAs($user)
+            ->patch(route('projects.tickets.status.update', [$project, $ticket]), [
+                'redirect_to' => 'board',
+                'ticket_status_id' => $doneStatus->id,
+            ])
+            ->assertRedirect(route('projects.board.index', $project))
+            ->assertSessionHasNoErrors();
+
+        $this->assertSame($doneStatus->id, $ticket->fresh()->ticket_status_id);
+        $this->assertSame(1, $ticket->worklogEntries()->count());
     }
 
     /**

tests/Fixtures/board-drag-browser.mjs

@@ -0,0 +1,288 @@
+import assert from 'node:assert/strict';
+import process from 'node:process';
+
+const playwright = await import(process.env.PLAYWRIGHT_MODULE ?? 'playwright');
+const { chromium } = playwright.default ?? playwright;
+const browser = await chromium.launch({ channel: 'chrome', headless: true });
+const page = await browser.newPage({
+    viewport: { width: 1440, height: 1200 },
+    hasTouch: true,
+});
+page.setDefaultTimeout(10000);
+const failures = [];
+const requests = [];
+page.on('pageerror', (error) => failures.push(error.message));
+page.on('request', (request) => {
+    if (['POST', 'PATCH'].includes(request.method())) {
+        requests.push(request);
+    }
+});
+const base = 'http://127.0.0.1:4181/projects/7/board';
+const handle = () =>
+    page.getByRole('button', {
+        name: 'Drag ENG-42 to change status',
+        exact: true,
+    });
+const card = () => page.locator('article').filter({ hasText: 'ENG-42' });
+const visit = async (query = '') => {
+    await page.goto(base + query);
+    await page.getByRole('heading', { level: 1 }).waitFor();
+    requests.length = 0;
+};
+const center = async (locator) => {
+    const box = await locator.boundingBox();
+    assert.ok(box);
+    return { x: box.x + box.width / 2, y: box.y + box.height / 2 };
+};
+const begin = async () => {
+    await handle().scrollIntoViewIfNeeded();
+    const from = await center(handle());
+    await page.mouse.move(from.x, from.y);
+    await page.mouse.down();
+    await page.mouse.move(from.x + 12, from.y, { steps: 3 });
+};
+const moveToColumn = async (id) => {
+    const to = await center(page.locator(`#board-column-title-${id}`));
+    await page.mouse.move(to.x, to.y, { steps: 10 });
+};
+const dragToColumn = async (id) => {
+    await begin();
+    await moveToColumn(id);
+    await page.mouse.up();
+};
+const originalCard = async () => {
+    assert.equal(
+        await page
+            .locator('#board-column-1 article')
+            .filter({ hasText: 'ENG-42' })
+            .count(),
+        1,
+    );
+};
+try {
+    for (const theme of ['light', 'dark']) {
+        await page.emulateMedia({
+            colorScheme: theme,
+            reducedMotion: 'reduce',
+        });
+        await visit();
+        assert.equal(
+            await page
+                .getByRole('button', { name: 'Drag ENG-43 to change status' })
+                .isDisabled(),
+            true,
+        );
+        await begin();
+        assert.equal(
+            await page
+                .locator('#board-column-2')
+                .evaluate((el) => el.classList.contains('border-primary')),
+            true,
+        );
+        assert.equal(
+            await page
+                .locator('#board-column-3')
+                .evaluate((el) => el.classList.contains('opacity-40')),
+            true,
+        );
+        await moveToColumn(3);
+        await page.mouse.up();
+        await originalCard();
+        assert.equal(requests.length, 0);
+
+        await begin();
+        await moveToColumn(2);
+        await page.keyboard.press('Escape');
+        await page.mouse.up();
+        assert.equal(requests.length, 0);
+        await originalCard();
+
+        // Pointer capture cancellation must never become a drop.
+        await begin();
+        await handle().dispatchEvent('pointercancel', { pointerId: 1 });
+        await page.mouse.up();
+        assert.equal(requests.length, 0);
+
+        await visit('?multiple');
+        await dragToColumn(2);
+        const dialog = page.getByRole('dialog');
+        await dialog.waitFor();
+        assert.equal(requests.length, 0);
+        assert.deepEqual(
+            await dialog
+                .locator('option')
+                .evaluateAll((options) =>
+                    options.map((option) => option.value),
+                ),
+            ['20', '21'],
+        );
+        await page.keyboard.press('Escape');
+        await dialog.waitFor({ state: 'hidden' });
+        assert.equal(
+            await handle().evaluate((el) => el === document.activeElement),
+            true,
+        );
+        assert.equal(requests.length, 0);
+        await originalCard();
+        await dragToColumn(2);
+        const select = dialog.getByLabel('Destination status');
+        await select.focus();
+        await select.selectOption('21');
+        await page.keyboard.press('Tab');
+        await page.keyboard.press('Tab');
+        assert.equal(await page.locator(':focus').innerText(), 'Update status');
+        await page.keyboard.press('Enter');
+        await page
+            .getByText('ENG-42 moved successfully.', { exact: true })
+            .waitFor();
+        assert.equal(requests.length, 1);
+        assert.deepEqual(requests[0].postDataJSON(), {
+            ticket_status_id: 21,
+            redirect_to: 'board',
+        });
+        assert.equal(
+            await page
+                .locator('#board-column-2 article')
+                .filter({ hasText: 'ENG-42' })
+                .count(),
+            1,
+        );
+
+        await visit('?reject');
+        await dragToColumn(2);
+        await page
+            .getByText('This transition is no longer allowed.', { exact: true })
+            .waitFor();
+        await originalCard();
+        assert.equal(requests.length, 1);
+
+        await visit('?slow');
+        await dragToColumn(2);
+        await page.locator('[data-form-state="loading"]').waitFor();
+        assert.equal(await handle().isDisabled(), true);
+        assert.equal(
+            await page.getByLabel('Move ENG-42', { exact: true }).isDisabled(),
+            true,
+        );
+        // Attempt a competing form submit even though its controls are disabled.
+        await card()
+            .locator('form')
+            .evaluate((form) => form.requestSubmit());
+        await page
+            .getByText('ENG-42 moved successfully.', { exact: true })
+            .waitFor();
+        assert.equal(requests.length, 1);
+
+        await visit('?slow');
+        await card()
+            .getByRole('button', { name: 'Update status', exact: true })
+            .click();
+        assert.equal(await handle().isDisabled(), true);
+        await page
+            .getByText('ENG-42 moved successfully.', { exact: true })
+            .waitFor();
+        assert.equal(requests.length, 1);
+
+        await visit();
+        await page.route('**/tickets/42/status', (route) =>
+            route.abort('failed'),
+        );
+        await dragToColumn(2);
+        await page.locator('[data-form-state="network"]').waitFor();
+        await originalCard();
+        assert.equal(await handle().isEnabled(), true);
+        await page.unroute('**/tickets/42/status');
+        await page
+            .getByRole('button', { name: 'Try again', exact: true })
+            .click();
+        await page
+            .getByText('ENG-42 moved successfully.', { exact: true })
+            .waitFor();
+        assert.equal(requests.length, 2);
+
+        await visit();
+        await page.route('**/tickets/42/status', (route) =>
+            route.fulfill({ status: 500, body: 'Unavailable' }),
+        );
+        await dragToColumn(2);
+        await page.locator('[data-form-state="server"]').waitFor();
+        await originalCard();
+        await page.unroute('**/tickets/42/status');
+
+        // Normal touch gestures still scroll; only the explicit handle captures a drag.
+        await page.setViewportSize({ width: 390, height: 1000 });
+        await visit('?multiple');
+        await handle().scrollIntoViewIfNeeded();
+        assert.equal(
+            await handle().evaluate((el) => getComputedStyle(el).touchAction),
+            'none',
+        );
+        assert.notEqual(
+            await card().evaluate((el) => getComputedStyle(el).touchAction),
+            'none',
+        );
+        const cdp = await page.context().newCDPSession(page);
+        const from = await center(handle());
+        await cdp.send('Input.dispatchTouchEvent', {
+            type: 'touchStart',
+            touchPoints: [{ ...from, id: 1 }],
+        });
+        await cdp.send('Input.dispatchTouchEvent', {
+            type: 'touchMove',
+            touchPoints: [{ x: from.x + 16, y: from.y, id: 1 }],
+        });
+        const tray = page.locator('[data-board-mobile-targets]');
+        await tray.waitFor();
+        const to = await center(tray.locator('[data-board-drop-column="2"]'));
+        await cdp.send('Input.dispatchTouchEvent', {
+            type: 'touchMove',
+            touchPoints: [{ ...to, id: 1 }],
+        });
+        await page.screenshot({
+            path: `/private/tmp/kan28-mobile-drag-${theme}.png`,
+            fullPage: true,
+        });
+        assert.equal(
+            await page.evaluate(
+                () => document.documentElement.scrollWidth <= innerWidth,
+            ),
+            true,
+        );
+        await cdp.send('Input.dispatchTouchEvent', {
+            type: 'touchEnd',
+            touchPoints: [],
+        });
+        await page.getByRole('dialog').waitFor();
+        await page.getByLabel('Destination status').selectOption('20');
+        await page
+            .getByRole('dialog')
+            .getByRole('button', { name: 'Update status' })
+            .click();
+        await page
+            .getByText('ENG-42 moved successfully.', { exact: true })
+            .waitFor();
+        assert.equal(
+            await page.getByLabel('Choose a column').inputValue(),
+            '2',
+        );
+        assert.equal(requests.length, 1);
+        await cdp.detach();
+        await page.screenshot({
+            path: `/private/tmp/kan28-mobile-result-${theme}.png`,
+            fullPage: true,
+        });
+
+        await visit('?readonly');
+        assert.equal(
+            await page.getByRole('button', { name: /Drag ENG/ }).count(),
+            0,
+        );
+        await page.setViewportSize({ width: 1440, height: 1200 });
+    }
+    assert.deepEqual(failures, []);
+    console.log(
+        'Board drag checks passed: mouse, touch, workflow restrictions, selection, cancellation, focus, request guards and recovery in both themes.',
+    );
+} finally {
+    await browser.close();
+}

tests/Fixtures/board.mjs

@@ -114,6 +114,9 @@ function makePage(url) {
                 'InvestigateALongUnbrokenTicketTitleThatMustWrapEvenOnTheSmallestMobileScreenWithoutClipping',
             ),
         ];
+        if (params.has('multiple')) {
+            tickets[0].ticket_status.allowed_target_statuses.push(statuses[3]);
+        }
         for (const column of boardColumns) {
             column.tickets = tickets.filter(
                 (item) => item.ticket_status.board_column_id === column.id,
@@ -167,7 +170,7 @@ function makePage(url) {
 }
 if (serve) {
     server.middlewares.use(async (request, response) => {
-        if (request.method === 'POST') {
+        if (request.method === 'POST' || request.method === 'PATCH') {
             let body = '';
             for await (const chunk of request) {
                 body += chunk;
@@ -175,12 +178,21 @@ if (serve) {
             const data = JSON.parse(body);
             assert.equal(
                 request.url,
-                '/projects/7/tickets/42/status?_method=PATCH',
+                request.method === 'POST'
+                    ? '/projects/7/tickets/42/status?_method=PATCH'
+                    : '/projects/7/tickets/42/status',
             );
+            assert.deepEqual(Object.keys(data).sort(), [
+                'redirect_to',
+                'ticket_status_id',
+            ]);
             assert.equal(data.redirect_to, 'board');
-            assert.ok([11, 20, 99].includes(Number(data.ticket_status_id)));
+            assert.ok([11, 20, 21, 99].includes(Number(data.ticket_status_id)));
             const previous = new URL(request.headers.referer);
             const reject = previous.searchParams.has('reject');
+            if (previous.searchParams.has('slow')) {
+                await new Promise((resolve) => setTimeout(resolve, 500));
+            }
             response.writeHead(303, {
                 Location: `/projects/7/board?${reject ? 'reject&rejected' : `target=${data.ticket_status_id}`}`,
             });