feat(backend): subtask category support (schema, validation, sync, routes)

backend/src/db/schema.ts

@@ -44,6 +44,7 @@ export const tasks = pgTable('tasks', {
   id: text('id').primaryKey(),
   userId: text('user_id').notNull().references(() => users.id, { onDelete: 'cascade' }),
   categoryId: text('category_id').references(() => categories.id, { onDelete: 'cascade' }),
+  tags: text('tags').notNull().default(''),
   title: text('title').notNull(),
   description: text('description').notNull().default(''),
   priority: text('priority', { enum: ['none', 'low', 'medium', 'high', 'critical'] }).notNull().default('none'),
@@ -84,6 +85,7 @@ export const subtasks = pgTable('subtasks', {
   userId: text('user_id').notNull().references(() => users.id, { onDelete: 'cascade' }),
   taskId: text('task_id').notNull().references(() => tasks.id, { onDelete: 'cascade' }),
   parentSubtaskId: text('parent_subtask_id').references((): AnyPgColumn => subtasks.id, { onDelete: 'cascade' }),
+  categoryId: text('category_id').references(() => categories.id, { onDelete: 'set null' }),
   title: text('title').notNull(),
   description: text('description').notNull().default(''),
   priority: text('priority', { enum: ['none', 'low', 'medium', 'high', 'critical'] }).notNull().default('none'),

backend/src/routes/subtasks.ts

@@ -82,6 +82,7 @@ router.post('/task/:taskId', asyncHandler(async (req: Request, res: Response) =>
     userId,
     taskId: req.params.taskId,
     parentSubtaskId,
+    categoryId: data.categoryId ?? null,
     title: data.title,
     description: data.description ?? '',
     priority: data.priority ?? 'none',

backend/src/routes/sync.ts

@@ -235,6 +235,7 @@ router.post('/push', asyncHandler(async (req: Request, res: Response) => {
                 title: task.title,
                 description: task.description,
                 categoryId: task.categoryId,
+                tags: task.tags ?? '',
                 priority: task.priority,
                 completed: task.completed,
                 dueDate: task.dueDate,
@@ -290,6 +291,7 @@ router.post('/push', asyncHandler(async (req: Request, res: Response) => {
               .set({
                 taskId: sub.taskId,
                 parentSubtaskId: sub.parentSubtaskId ?? null,
+                categoryId: sub.categoryId ?? null,
                 title: sub.title,
                 description: sub.description ?? '',
                 priority: sub.priority ?? 'none',

backend/src/routes/tasks.ts

@@ -135,6 +135,7 @@ router.post('/', asyncHandler(async (req: Request, res: Response) => {
     id: taskId,
     userId,
     categoryId: data.categoryId,
+    tags: data.tags ?? '',
     title: data.title,
     description: data.description ?? '',
     priority: data.priority ?? 'none',
@@ -159,6 +160,7 @@ router.post('/', asyncHandler(async (req: Request, res: Response) => {
       userId,
       taskId,
       title: st.title,
+      categoryId: (st as any).categoryId ?? null,
       completed: false,
       order: index,
       createdAt: now,

backend/src/utils/validation.ts

@@ -39,6 +39,7 @@ export const taskCreateSchema = z.object({
   title: z.string().min(1).max(100),
   description: z.string().max(1000).optional(),
   categoryId: z.string().max(100).transform((v) => (v === '' ? null : v)).nullable(),
+  tags: z.string().max(500).optional(),
   priority: z.enum(['none', 'low', 'medium', 'high', 'critical']).optional(),
   dueDate: z.number().int().min(0).optional(),
   dueTime: z.string().regex(/^([01]\d|2[0-3]):([0-5]\d)$/).optional().or(z.literal('')).transform(v => v ?? ''),
@@ -52,13 +53,14 @@ export const taskCreateSchema = z.object({
   reminders: z.string().max(100).optional(),
   assigneeId: z.string().nullable().optional(),
   completedAt: z.number().int().min(0).nullable().optional(),
-  subtasks: z.array(z.object({ title: z.string().min(1).max(100) })).optional(),
+  subtasks: z.array(z.object({ title: z.string().min(1).max(100), categoryId: z.string().max(100).nullable().optional().transform((v) => (v === '' ? null : v)) })).optional(),
 });
 
 export const taskUpdateSchema = z.object({
   title: z.string().min(1).max(100).optional(),
   description: z.string().max(1000).optional(),
   categoryId: z.string().max(100).nullable().optional().transform((v) => (v === '' ? null : v)),
+  tags: z.string().max(500).optional(),
   priority: z.enum(['none', 'low', 'medium', 'high', 'critical']).optional(),
   completed: z.boolean().optional(),
   dueDate: z.number().int().min(0).optional(),
@@ -72,6 +74,7 @@ export const taskUpdateSchema = z.object({
 export const subtaskCreateSchema = z.object({
   title: z.string().min(1).max(100),
   description: z.string().max(1000).optional(),
+  categoryId: z.string().max(100).nullable().optional().transform((v) => (v === '' ? null : v)),
   priority: z.enum(['none', 'low', 'medium', 'high', 'critical']).optional(),
   dueDate: z.number().int().min(0).optional(),
   dueTime: z.string().regex(/^([01]\d|2[0-3]):([0-5]\d)$/).optional().or(z.literal('')).transform(v => v ?? ''),
@@ -91,6 +94,7 @@ export const subtaskCreateSchema = z.object({
 export const subtaskUpdateSchema = z.object({
   title: z.string().min(1).max(100).optional(),
   description: z.string().max(1000).optional(),
+  categoryId: z.string().max(100).nullable().optional().transform((v) => (v === '' ? null : v)),
   priority: z.enum(['none', 'low', 'medium', 'high', 'critical']).optional(),
   completed: z.boolean().optional(),
   dueDate: z.number().int().min(0).optional(),