feat(iced): add dock profile management

hcie-iced-app/crates/hcie-iced-gui/src/settings.rs

@@ -6,6 +6,24 @@
 use serde::{Deserialize, Serialize};
 use std::path::PathBuf;
 
+/// A saved dock layout profile.
+///
+/// Stores a simplified pane layout description along with layout dimensions
+/// so the user can save, load, rename, and delete dock configurations.
+/// The full iced PaneGrid State cannot be serialized directly, so we store
+/// the essential layout info: which panels are open and their relative positions.
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct DockProfile {
+    pub name: String,
+    /// List of panel names currently visible in the dock (e.g. "Layers", "History").
+    pub visible_panels: Vec<String>,
+    pub left_col1_w: f32,
+    pub left_col2_w: f32,
+    pub right_col1_w: f32,
+    pub right_col2_w: f32,
+    pub last_window_width: f32,
+}
+
 /// Main settings structure saved to disk.
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct AppSettings {
@@ -15,6 +33,9 @@ pub struct AppSettings {
     pub panel_layout: PanelLayout,
     /// Window settings.
     pub window: WindowSettings,
+    /// Saved dock layout profiles.
+    #[serde(default)]
+    pub dock_profiles: Vec<DockProfile>,
 }
 
 /// Tool-specific settings that persist between sessions.
@@ -68,6 +89,7 @@ impl Default for AppSettings {
             tool_settings: ToolSettings::default(),
             panel_layout: PanelLayout::default(),
             window: WindowSettings::default(),
+            dock_profiles: Vec::new(),
         }
     }
 }