feat(channel): add logo support with position and opacity settings

k-tv-backend/api/src/dto.rs

@@ -76,6 +76,10 @@ pub struct UpdateChannelRequest {
     pub access_mode: Option<domain::AccessMode>,
     /// Empty string clears the password; non-empty re-hashes.
     pub access_password: Option<String>,
+    /// `Some(None)` = clear logo, `Some(Some(url))` = set logo, `None` = unchanged.
+    pub logo: Option<Option<String>>,
+    pub logo_position: Option<domain::LogoPosition>,
+    pub logo_opacity: Option<f32>,
 }
 
 #[derive(Debug, Serialize)]
@@ -89,6 +93,9 @@ pub struct ChannelResponse {
     pub recycle_policy: domain::RecyclePolicy,
     pub auto_schedule: bool,
     pub access_mode: domain::AccessMode,
+    pub logo: Option<String>,
+    pub logo_position: domain::LogoPosition,
+    pub logo_opacity: f32,
     pub created_at: DateTime<Utc>,
     pub updated_at: DateTime<Utc>,
 }
@@ -105,6 +112,9 @@ impl From<domain::Channel> for ChannelResponse {
             recycle_policy: c.recycle_policy,
             auto_schedule: c.auto_schedule,
             access_mode: c.access_mode,
+            logo: c.logo,
+            logo_position: c.logo_position,
+            logo_opacity: c.logo_opacity,
             created_at: c.created_at,
             updated_at: c.updated_at,
         }

k-tv-backend/api/src/routes/channels/crud.rs

@@ -101,6 +101,15 @@ pub(super) async fn update_channel(
             channel.access_password_hash = Some(infra::auth::hash_password(&pw));
         }
     }
+    if let Some(logo) = payload.logo {
+        channel.logo = logo;
+    }
+    if let Some(pos) = payload.logo_position {
+        channel.logo_position = pos;
+    }
+    if let Some(opacity) = payload.logo_opacity {
+        channel.logo_opacity = opacity.clamp(0.0, 1.0);
+    }
     channel.updated_at = Utc::now();
 
     let channel = state.channel_service.update(channel).await?;