feat: Implement auto-capture and cursor-free snapshots

- Add automatic capture start/stop based on board detection
- Implement cursor-free snapshot system:
  * Add SCStreamConfiguration cursor control
  * Add temporary capture session management
  * Ensure clean snapshots without cursor artifacts
- Add visual feedback:
  * Status indicator (green/yellow/gray)
  * Snapshot preview below board
  * Clear capture state indication
- Update documentation:
  * Add snapshot system patterns
  * Document cursor control implementation
  * Update technical constraints

ChessPrism/ChessPrism/Assets.xcassets/AppIcon.appiconset/Contents.json

@@ -1,6 +1,7 @@
 {
   "images" : [
     {
+      "filename" : "ChessPrism_Icon.png",
       "idiom" : "universal",
       "platform" : "ios",
       "size" : "1024x1024"
@@ -12,6 +13,7 @@
           "value" : "dark"
         }
       ],
+      "filename" : "ChessPrism_Icon 1.png",
       "idiom" : "universal",
       "platform" : "ios",
       "size" : "1024x1024"
@@ -23,56 +25,67 @@
           "value" : "tinted"
         }
       ],
+      "filename" : "ChessPrism_Icon 2.png",
       "idiom" : "universal",
       "platform" : "ios",
       "size" : "1024x1024"
     },
     {
+      "filename" : "ChessPrism_Icon 3.png",
       "idiom" : "mac",
       "scale" : "1x",
       "size" : "16x16"
     },
     {
+      "filename" : "ChessPrism_Icon 4.png",
       "idiom" : "mac",
       "scale" : "2x",
       "size" : "16x16"
     },
     {
+      "filename" : "ChessPrism_Icon 6.png",
       "idiom" : "mac",
       "scale" : "1x",
       "size" : "32x32"
     },
     {
+      "filename" : "ChessPrism_Icon 5.png",
       "idiom" : "mac",
       "scale" : "2x",
       "size" : "32x32"
     },
     {
+      "filename" : "ChessPrism_Icon 8.png",
       "idiom" : "mac",
       "scale" : "1x",
       "size" : "128x128"
     },
     {
+      "filename" : "ChessPrism_Icon 7.png",
       "idiom" : "mac",
       "scale" : "2x",
       "size" : "128x128"
     },
     {
+      "filename" : "ChessPrism_Icon 10.png",
       "idiom" : "mac",
       "scale" : "1x",
       "size" : "256x256"
     },
     {
+      "filename" : "ChessPrism_Icon 9.png",
       "idiom" : "mac",
       "scale" : "2x",
       "size" : "256x256"
     },
     {
+      "filename" : "ChessPrism_Icon 12.png",
       "idiom" : "mac",
       "scale" : "1x",
       "size" : "512x512"
     },
     {
+      "filename" : "ChessPrism_Icon 11.png",
       "idiom" : "mac",
       "scale" : "2x",
       "size" : "512x512"