Expand OCR bounding boxes by 5% for stat values

- Add 5% expansion to bounding boxes for hp_value, attack_value, defense_value, sp_atk_value, sp_def_value, speed_value
- Expansion applied before clipping to image boundaries
- Added debug logging to show bbox expansion transformations
- Should improve OCR accuracy for tight stat value detections

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

app/src/main/java/com/quillstudios/pokegoalshelper/ScreenCaptureService.kt

@@ -636,18 +636,37 @@ class ScreenCaptureService : Service() {
         if (detection == null) return null
 
         try {
-            // Validate and clip bounding box to image boundaries
+            // Expand bounding box by 5% for stat value classes to improve OCR accuracy
             val bbox = detection.boundingBox
-            val clippedX = kotlin.math.max(0, kotlin.math.min(bbox.x, mat.cols() - 1))
-            val clippedY = kotlin.math.max(0, kotlin.math.min(bbox.y, mat.rows() - 1))
-            val clippedWidth = kotlin.math.max(1, kotlin.math.min(bbox.width, mat.cols() - clippedX))
-            val clippedHeight = kotlin.math.max(1, kotlin.math.min(bbox.height, mat.rows() - clippedY))
+            val expandedBbox = if (detection.className in setOf("hp_value", "attack_value", "defense_value", "sp_atk_value", "sp_def_value", "speed_value")) {
+                val expansionFactor = 0.05f // 5% expansion
+                val widthExpansion = (bbox.width * expansionFactor).toInt()
+                val heightExpansion = (bbox.height * expansionFactor).toInt()
+                
+                Rect(
+                    bbox.x - widthExpansion,
+                    bbox.y - heightExpansion,
+                    bbox.width + (2 * widthExpansion),
+                    bbox.height + (2 * heightExpansion)
+                )
+            } else {
+                bbox
+            }
+            
+            // Validate and clip bounding box to image boundaries
+            val clippedX = kotlin.math.max(0, kotlin.math.min(expandedBbox.x, mat.cols() - 1))
+            val clippedY = kotlin.math.max(0, kotlin.math.min(expandedBbox.y, mat.rows() - 1))
+            val clippedWidth = kotlin.math.max(1, kotlin.math.min(expandedBbox.width, mat.cols() - clippedX))
+            val clippedHeight = kotlin.math.max(1, kotlin.math.min(expandedBbox.height, mat.rows() - clippedY))
             
             val safeBbox = Rect(clippedX, clippedY, clippedWidth, clippedHeight)
             
-            // Debug logging for problematic bounding boxes
-            if (safeBbox.x != bbox.x || safeBbox.y != bbox.y || safeBbox.width != bbox.width || safeBbox.height != bbox.height) {
-                Log.w(TAG, "⚠️ Clipped bbox for ${detection.className}: original=[${bbox.x},${bbox.y},${bbox.width},${bbox.height}] → safe=[${safeBbox.x},${safeBbox.y},${safeBbox.width},${safeBbox.height}] (image: ${mat.cols()}x${mat.rows()})")
+            // Debug logging for bounding box transformations
+            if (expandedBbox != bbox) {
+                Log.d(TAG, "📏 Expanded bbox for ${detection.className}: [${bbox.x},${bbox.y},${bbox.width},${bbox.height}] → [${expandedBbox.x},${expandedBbox.y},${expandedBbox.width},${expandedBbox.height}]")
+            }
+            if (safeBbox.x != expandedBbox.x || safeBbox.y != expandedBbox.y || safeBbox.width != expandedBbox.width || safeBbox.height != expandedBbox.height) {
+                Log.w(TAG, "⚠️ Clipped bbox for ${detection.className}: expanded=[${expandedBbox.x},${expandedBbox.y},${expandedBbox.width},${expandedBbox.height}] → safe=[${safeBbox.x},${safeBbox.y},${safeBbox.width},${safeBbox.height}] (image: ${mat.cols()}x${mat.rows()})")
             }
             
             // Extract region of interest using safe bounding box