feat(api): add endpoint to fetch all assigned cards with related data

- Implemented GET /api/cards/assigned endpoint to return all cards assigned to the current user (as member or author)
- Included related entities: labels, task lists, tasks, attachments, custom fields, memberships, and users
- Added route to config/routes.js
- Ensured response format matches project conventions for proper client display

server/api/controllers/cards/assigned.js

@@ -0,0 +1,57 @@
+/*!
+ * Copyright (c) 2024 PLANKA Software GmbH
+ * Licensed under the Fair Use License: https://github.com/plankanban/planka/blob/master/LICENSE.md
+ */
+
+module.exports = {
+  inputs: {},
+
+  async fn() {
+    const { currentUser } = this.req;
+
+    // Get all cards where the user is a member
+    const cardMemberships = await CardMembership.find({ userId: currentUser.id });
+    const cardIdsByMembership = cardMemberships.map((cm) => cm.cardId);
+
+    // Get all cards where the user is the author
+    const cardsByAuthor = await Card.find({ creatorUserId: currentUser.id });
+    const cardIdsByAuthor = cardsByAuthor.map((c) => c.id);
+
+    // Merge card ids
+    const cardIds = Array.from(new Set([...cardIdsByMembership, ...cardIdsByAuthor]));
+    if (cardIds.length === 0) {
+      return { items: [], included: {} };
+    }
+
+    // Get cards
+    const cards = await Card.qm.getByIds(cardIds);
+
+    // Collect related data
+    const users = await User.qm.getByIds(cards.map((c) => c.creatorUserId));
+    const cardMembershipsAll = await CardMembership.qm.getByCardIds(cardIds);
+    const cardLabels = await CardLabel.qm.getByCardIds(cardIds);
+    const taskLists = await TaskList.qm.getByCardIds(cardIds);
+    const taskListIds = taskLists.map((tl) => tl.id);
+    const tasks = await Task.qm.getByTaskListIds(taskListIds);
+    const attachments = await Attachment.qm.getByCardIds(cardIds);
+    const customFieldGroups = await CustomFieldGroup.qm.getByCardIds(cardIds);
+    const customFieldGroupIds = customFieldGroups.map((cfg) => cfg.id);
+    const customFields = await CustomField.qm.getByCustomFieldGroupIds(customFieldGroupIds);
+    const customFieldValues = await CustomFieldValue.qm.getByCardIds(cardIds);
+
+    return {
+      items: cards,
+      included: {
+        cardMemberships: cardMembershipsAll,
+        cardLabels,
+        taskLists,
+        tasks,
+        customFieldGroups,
+        customFields,
+        customFieldValues,
+        users: sails.helpers.users.presentMany(users, currentUser),
+        attachments: sails.helpers.attachments.presentMany(attachments),
+      },
+    };
+  },
+};