Add dismiss functionality for completed standalone tasksmakima/task-task-5dde682c-5dde682c

## Changes

### Backend
- Add 'hidden' field to Task model (models.rs)
- Add database migration for hidden column (20250122000000_add_task_hidden.sql)
- Update task listing queries to include hidden field and filter out hidden tasks
- Update update_task_for_owner to handle hidden field

### Frontend
- Add hidden field to TaskSummary interface (api.ts)
- Add dismissTask API function (api.ts)
- Add hideTask function to useTasks hook
- Add Dismiss button to TaskList for completed standalone tasks
- Wire up onDismiss handler in mesh.tsx route

## Behavior
- Completed standalone tasks (tasks without a contract) show a "Dismiss" button
- Dismissing a task sets hidden=true and removes it from the task list
- Hidden tasks are filtered out by default in all task listing queries

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/makima/src/db/models.rs b/makima/src/db/models.rs
index bf95a3a..6ede268 100644
--- a/makima/src/db/models.rs
+++ b/makima/src/db/models.rs
@@ -525,6 +525,12 @@ pub struct Task {
     /// Used to track the origin of "what if" explorations.
     #[serde(skip_serializing_if = "Option::is_none")]
     pub branched_from_task_id: Option<Uuid>,
+
+    // UI visibility
+    /// Whether this task is hidden from the UI (user dismissed it).
+    /// Standalone completed tasks can be dismissed by the user.
+    #[serde(default)]
+    pub hidden: bool,
 }
 
 impl Task {
@@ -564,6 +570,9 @@ pub struct TaskSummary {
     /// True for contract supervisor tasks
     #[serde(default)]
     pub is_supervisor: bool,
+    /// Whether this task is hidden from the UI (user dismissed it)
+    #[serde(default)]
+    pub hidden: bool,
     pub created_at: DateTime<Utc>,
     pub updated_at: DateTime<Utc>,
 }
@@ -586,6 +595,7 @@ impl From<Task> for TaskSummary {
             subtask_count: 0, // Would need separate query
             version: task.version,
             is_supervisor: task.is_supervisor,
+            hidden: task.hidden,
             created_at: task.created_at,
             updated_at: task.updated_at,
         }
@@ -670,6 +680,8 @@ pub struct UpdateTaskRequest {
     /// Explicitly clear daemon_id (set to NULL)
     #[serde(default)]
     pub clear_daemon_id: bool,
+    /// Whether this task is hidden from the UI (user dismissed it)
+    pub hidden: Option<bool>,
     /// Version for optimistic locking
     pub version: Option<i32>,
 }