Add per-project card statuses and a kanban board

Statuses
- Migration 006: card_statuses table (project-scoped) and cards.status_id, a
  nullable FK with ON DELETE SET NULL. Every new project is seeded with
  "To do" / "Doing" / "Done"; GET /api/projects/{id}/statuses lists them.
- New cards have no status -- they sit in an "inbox" until moved.

Project view
- Full-width and tabbed: "All tasks" (a flat list, sorted by name
  case-insensitively) and "Kanban" (Inbox plus one column per status).
- Drag a card within or between columns to reorder / restatus; the Inbox
  column has its own name + Add form.

Ordering
- Migration 007: `position` is now a dense 0..n-1 rank within a
  (project_id, status_id) column, not a project-wide order. New composite
  index idx_cards_project_status_position; existing rows re-ranked.
- PUT /api/projects/{id}/cards/order takes { status_id, card_ids } and sets one
  column's contents and order, re-parenting moved-in cards and re-packing their
  source column in a single transaction. PATCH status_id appends the card to the
  end of the destination column.

58 phpunit tests pass; the frontend type-checks and builds.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

web/src/style.css

@@ -75,6 +75,12 @@ a.badge {
   padding: 0 1.25rem;
 }
 
+/* Full-bleed layout for views that need the room (e.g. the project board). */
+.app__main--wide {
+  max-width: none;
+  margin: 1.5rem auto;
+}
+
 .card {
   background: var(--surface);
   border: 1px solid var(--border);
@@ -174,22 +180,21 @@ h1 {
   background: var(--surface);
 }
 
-.card-row--ghost {
-  opacity: 0.5;
-}
-
-.card-row__handle {
-  cursor: grab;
-  color: var(--muted);
-  user-select: none;
-  padding: 0 0.15rem;
-  line-height: 1;
-}
-
-.card-row__check {
+.card-row__status {
   flex: none;
-  width: 1.1rem;
-  height: 1.1rem;
+  padding: 0.15rem 0.55rem;
+  border-radius: 999px;
+  font-size: 0.75rem;
+  font-weight: 600;
+  white-space: nowrap;
+  border: 1px solid var(--border);
+  background: var(--bg);
+  color: var(--muted);
+}
+
+.card-row__status--none {
+  font-weight: 400;
+  font-style: italic;
 }
 
 .card-row__text {
@@ -213,11 +218,6 @@ h1 {
   background: var(--bg);
 }
 
-.card-row--done .card-row__text {
-  text-decoration: line-through;
-  color: var(--muted);
-}
-
 .card-row__delete {
   flex: none;
   border: none;
@@ -348,6 +348,123 @@ h1 {
   color: var(--error);
 }
 
+/* --- project detail: keep the header/prose readable on the wide layout -- */
+
+.project__chrome {
+  max-width: 42rem;
+}
+
+/* --- tabs -------------------------------------------------------------- */
+
+.tabs {
+  display: flex;
+  gap: 0.25rem;
+  border-bottom: 1px solid var(--border);
+  margin: 1.25rem 0 1rem;
+}
+
+.tabs__tab {
+  border: none;
+  background: none;
+  font: inherit;
+  color: var(--muted);
+  cursor: pointer;
+  padding: 0.5rem 0.9rem;
+  border-bottom: 2px solid transparent;
+  margin-bottom: -1px;
+}
+
+.tabs__tab:hover {
+  color: var(--text);
+}
+
+.tabs__tab--active {
+  color: var(--text);
+  font-weight: 600;
+  border-bottom-color: var(--accent);
+}
+
+.tabs__panel--narrow {
+  max-width: 42rem;
+}
+
+/* --- kanban board ---------------------------------------------------- */
+
+.kanban {
+  display: flex;
+  gap: 1rem;
+  align-items: flex-start;
+  overflow-x: auto;
+  padding-bottom: 0.5rem;
+}
+
+.kanban__col {
+  flex: 0 0 16rem;
+  background: var(--bg);
+  border: 1px solid var(--border);
+  border-radius: 10px;
+  padding: 0.75rem;
+}
+
+.kanban__head {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  margin-bottom: 0.6rem;
+  font-size: 0.85rem;
+  font-weight: 600;
+}
+
+.kanban__count {
+  color: var(--muted);
+  font-weight: 400;
+}
+
+.kanban__cards {
+  display: flex;
+  flex-direction: column;
+  gap: 0.5rem;
+  min-height: 3rem;
+}
+
+.kanban-card {
+  background: var(--surface);
+  border: 1px solid var(--border);
+  border-radius: 8px;
+  padding: 0.55rem 0.65rem;
+  font-size: 0.9rem;
+  cursor: grab;
+}
+
+.kanban-card--ghost {
+  opacity: 0.5;
+}
+
+.kanban__new {
+  display: flex;
+  gap: 0.4rem;
+  margin-top: 0.6rem;
+}
+
+.kanban__new input {
+  flex: 1;
+  min-width: 0;
+  font: inherit;
+  font-size: 0.9rem;
+  padding: 0.4rem 0.5rem;
+  border: 1px solid var(--border);
+  border-radius: 6px;
+  background: var(--surface);
+  color: var(--text);
+}
+
+.kanban__new button[type="submit"] {
+  flex: none;
+  padding: 0.4rem 0.7rem;
+  font-size: 0.9rem;
+  border-radius: 6px;
+}
+
 /* --- confirmation modal --------------------------------------------------- */
 
 .modal {