feat: goals — "watch N movies in YEAR" with progress bar

Domain: Goal entity, UserSettings (federation toggle), RemoteGoalEntry.
Ports: GoalRepository, UserSettingsRepository, RemoteGoalRepository.
Adapters: sqlite + postgres repos, migrations, AP content query extensions.
Application: CRUD use cases (create/update/delete/get/list), settings use cases.
API: 7 endpoints (/goals CRUD, /users/{id}/goals, /settings) with utoipa docs.
Federation: GoalObject (Note + goal discriminator), outbound broadcast with
per-user toggle, inbound GoalObjectHandler in CompositeObjectHandler.
SPA: API client + hooks, GoalCard (shadcn Card+Progress+DropdownMenu),
GoalSheet (Drawer), profile integration (editable own, read-only others),
federation toggle in settings (Switch).
Classic HTML: glassmorphic goal card on profile, Frutiger Aero styling.
Progress computed from existing reviews — backwards compatible.

crates/application/src/goals/update.rs

@@ -0,0 +1,44 @@
+use domain::{
+    errors::DomainError, events::DomainEvent, models::GoalWithProgress, value_objects::UserId,
+};
+
+use super::commands::UpdateGoalCommand;
+use crate::context::AppContext;
+
+pub async fn execute(
+    ctx: &AppContext,
+    cmd: UpdateGoalCommand,
+) -> Result<GoalWithProgress, DomainError> {
+    let user_id = UserId::from_uuid(cmd.user_id);
+
+    let mut goal = ctx
+        .repos
+        .goal
+        .find_by_user_and_year(&user_id, cmd.year)
+        .await?
+        .ok_or_else(|| DomainError::NotFound(format!("Goal for year {}", cmd.year)))?;
+
+    goal.update_target(cmd.target_count)?;
+    ctx.repos.goal.update(&goal).await?;
+
+    let current_count = ctx
+        .repos
+        .goal
+        .count_reviews_in_year(&user_id, cmd.year)
+        .await?;
+
+    ctx.services
+        .event_publisher
+        .publish(&DomainEvent::GoalUpdated {
+            goal_id: goal.id().clone(),
+            user_id,
+            year: cmd.year,
+            target_count: cmd.target_count,
+        })
+        .await?;
+
+    Ok(GoalWithProgress {
+        goal,
+        current_count,
+    })
+}