add :emote and :list to chat

crates/chattyness-db/src/models.rs

@@ -1695,3 +1695,30 @@ pub struct JoinChannelResponse {
     pub member: ChannelMemberInfo,
     pub members: Vec<ChannelMemberWithAvatar>,
 }
+
+// =============================================================================
+// Emotion Availability
+// =============================================================================
+
+/// Emotion availability data for the emote command UI.
+///
+/// Indicates which of the 12 emotions have assets configured for the user's avatar,
+/// and provides preview paths (position 4/center) for rendering in the emotion picker.
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct EmotionAvailability {
+    /// Which emotions have at least one non-null asset slot (positions 0-8).
+    /// Index corresponds to emotion: 0=neutral, 1=happy, 2=sad, etc.
+    pub available: [bool; 12],
+    /// Center position (4) asset path for each emotion, used for preview rendering.
+    /// None if that emotion has no center asset.
+    pub preview_paths: [Option<String>; 12],
+}
+
+impl Default for EmotionAvailability {
+    fn default() -> Self {
+        Self {
+            available: [false; 12],
+            preview_paths: Default::default(),
+        }
+    }
+}