Extract UI panel constants from magic numbers

docs/planning/rendering-cleanup-plan.md

@@ -56,7 +56,7 @@ Remove all spacecraft texture-related code:
 - Handle BURN_CUSTOM case separately if needed
 - **PAUSE** for user review
 
-### Step 6: Extract UI Panel Constants
+### Step 6: Extract UI Panel Constants [COMPLETED]
 - Add constants to ui_renderer.cpp:
   - `INFO_PANEL_WIDTH = 300`
   - `INFO_PANEL_HEIGHT = 300`

src/ui_renderer.cpp

@@ -10,15 +10,25 @@
 #include "raygui.h"
 #include "amber/style_amber.h"
 
+// UI Panel constants
+#define INFO_PANEL_WIDTH 300
+#define INFO_PANEL_HEIGHT 300
+#define BODY_LIST_WIDTH 200
+#define BODY_LIST_HEIGHT 400
+#define BODY_INFO_WIDTH 250
+#define BODY_INFO_HEIGHT 300
+#define MANEUVER_LIST_WIDTH 300
+#define MANEUVER_LIST_HEIGHT 400
+#define MANEUVER_LIST_Y_OFFSET 320
+
 void gui_init() {
     GuiLoadStyleAmber();
 }
 
 // Render simulation information overlay
 void render_info(SimulationState* sim) {
-    // Panel dimensions
-    int panel_width = 300;
-    int panel_height = 300;
+    int panel_width = INFO_PANEL_WIDTH;
+    int panel_height = INFO_PANEL_HEIGHT;
     int panel_x = 10;
     int panel_y = GetScreenHeight() - panel_height - 10;
 
@@ -74,9 +84,8 @@ void render_info(SimulationState* sim) {
 
 // Render body list UI panel
 void render_body_list_ui(SimulationState* sim, RenderState* render_state, UIState* ui_state) {
-    // Panel dimensions
-    int panel_width = 200;
-    int panel_height = 400;
+    int panel_width = BODY_LIST_WIDTH;
+    int panel_height = BODY_LIST_HEIGHT;
     int panel_x = 10;
     int panel_y = 10;
 
@@ -147,9 +156,8 @@ void render_body_list_ui(SimulationState* sim, RenderState* render_state, UIStat
 
 // Render body information UI panel
 void render_body_info_ui(SimulationState* sim, RenderState* render_state, UIState* ui_state) {
-    // Panel dimensions
-    int panel_width = 250;
-    int panel_height = 300;
+    int panel_width = BODY_INFO_WIDTH;
+    int panel_height = BODY_INFO_HEIGHT;
     int panel_x = GetScreenWidth() - panel_width - 10;
     int panel_y = 10;
 
@@ -324,10 +332,10 @@ void render_maneuver_list_ui(SimulationState* sim, RenderState* render_state, UI
         return; // No spacecraft selected
     }
 
-    int panel_width = 300;
-    int panel_height = 400;
+    int panel_width = MANEUVER_LIST_WIDTH;
+    int panel_height = MANEUVER_LIST_HEIGHT;
     int panel_x = GetScreenWidth() - panel_width - 10;
-    int panel_y = 320; // Below info panel
+    int panel_y = MANEUVER_LIST_Y_OFFSET; // Below info panel
 
     Rectangle panel_bounds = { (float)panel_x, (float)panel_y, (float)panel_width, (float)panel_height };