Add tasks: the crew's shared to-do list

Bots and workspaces each keep a list of work tracked until it's done, and
the bots move it along themselves as they work.

- tasks (one collection per bot or per workspace), task_notes (the
  progress log) and task_media (a deliverable or a reference file, its
  bytes a private media row served at /media/private/<id>)
- statuses todo/doing/blocked/done/cancelled, with blocked_reason while
  only the user can unblock it
- visibility as SQL in src/utils/task-access: a user's own bots and
  workspaces, a run's own list plus its workspaces, everything for the
  coordinator; every tool and endpoint resolves through it
- list_tasks, create_task and update_task on every run, so a chat reply,
  a task and a routine all read the list, log progress and file what they
  produced
- TasksNote on every run and TaskReminderNote in chat, so a greeting or a
  proposed next step brings pending work up in one measured line
- tasks group on the workspace dashboard and a tasks modal in the
  conversation header, sharing one form, row and detail panel
- a bot's or workspace's own chat uploads are read before the delete so
  none are stranded; bot files keep their folder

Also corrects the README's RAM guidance and table alignment.

src/types/index.ts

@@ -9,6 +9,9 @@ import type {
     BUN_SQLITE_COBBLE_COMPUTERS,
     BUN_SQLITE_COBBLE_CRON_JOBS,
     BUN_SQLITE_COBBLE_MEDIA,
+    BUN_SQLITE_COBBLE_TASK_MEDIA,
+    BUN_SQLITE_COBBLE_TASK_NOTES,
+    BUN_SQLITE_COBBLE_TASKS,
     BUN_SQLITE_COBBLE_USER_TYPES,
     BUN_SQLITE_COBBLE_USERS,
     BUN_SQLITE_COBBLE_WORKSPACES,
@@ -84,6 +87,52 @@ export type CronJobWithNames = BUN_SQLITE_COBBLE_CRON_JOBS & {
     workspace_name?: string | null;
 };
 
+/**
+ * A task with what a list shows beside it: the bot and workspace it belongs
+ * to, and its latest note.
+ */
+export type TaskWithNames = BUN_SQLITE_COBBLE_TASKS & {
+    bot_name?: string | null;
+    bot_kind?: string | null;
+    bot_hue?: string | null;
+    bot_face?: string | null;
+    bot_image_media_id?: number | null;
+    workspace_name?: string | null;
+    /**
+     * Its newest note's text, for the row's second line.
+     */
+    latest_note?: string | null;
+    /**
+     * How many files it carries.
+     */
+    media_count?: number | null;
+};
+
+/**
+ * A file linked to a task, joined with the `media` row it's served from.
+ */
+export type TaskFile = BUN_SQLITE_COBBLE_TASK_MEDIA & {
+    media_type?: string | null;
+    mime_type?: string | null;
+    /**
+     * The `media` row's title, when the link has no name of its own.
+     */
+    media_title?: string | null;
+    /**
+     * Whether the `media` row is still there.
+     */
+    missing?: boolean;
+};
+
+/**
+ * A task with its notes and files: what the task modal and the workspace's
+ * tasks group render.
+ */
+export type TaskDetail = TaskWithNames & {
+    notes: BUN_SQLITE_COBBLE_TASK_NOTES[];
+    files: TaskFile[];
+};
+
 /**
  * A session in a conversation's sessions modal.
  */
@@ -810,6 +859,10 @@ export type PagePropsType = {
      * A workspace's dashboard: the user's latest sessions there.
      */
     workspace_activity?: WorkspaceActivityItem[] | null;
+    /**
+     * A workspace's dashboard: its shared to-do list.
+     */
+    workspace_tasks?: TaskWithNames[] | null;
     /**
      * The computer a settings page manages, with its access.
      */