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/domain/src/models/mod.rs

@@ -18,6 +18,12 @@ pub mod watchlist;
 pub use watchlist::{WatchlistEntry, WatchlistWithMovie};
 pub mod remote_watchlist;
 pub use remote_watchlist::RemoteWatchlistEntry;
+pub mod goal;
+pub use goal::{Goal, GoalWithProgress};
+pub mod user_settings;
+pub use user_settings::UserSettings;
+pub mod remote_goal;
+pub use remote_goal::RemoteGoalEntry;
 pub mod watch_event;
 pub mod wrapup;
 pub use watch_event::{
@@ -38,6 +44,32 @@ pub use search::{
     SearchResults,
 };
 
+#[derive(Clone, Debug, PartialEq, Eq)]
+pub enum GoalType {
+    Movies,
+}
+
+impl GoalType {
+    pub fn as_str(&self) -> &'static str {
+        match self {
+            Self::Movies => "movies",
+        }
+    }
+}
+
+impl std::str::FromStr for GoalType {
+    type Err = DomainError;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        match s {
+            "movies" => Ok(Self::Movies),
+            other => Err(DomainError::ValidationError(format!(
+                "Unknown goal type: {other}"
+            ))),
+        }
+    }
+}
+
 #[derive(Clone, Debug, Default)]
 pub enum SortDirection {
     #[default]