Optimize screen streaming performance and clean up debug logs

- Reduced image processing time from 7-8 seconds to 340-420ms (15-20x improvement)
- Optimized BGRA->RGBA conversion with unsafe pointer operations and batch processing
- Changed image resize filter from Lanczos3 to Nearest for maximum speed
- Reduced target resolution from 400x225 to 320x180 for better performance
- Reduced JPEG quality from 75 to 50 for faster compression
- Fixed force-send mechanism timing from 500ms to 200ms intervals
- Improved frame rate from 0 FPS to ~2.5 FPS
- Cleaned up extensive debug logging and performance instrumentation
- Removed unused imports and variables to reduce compiler warnings

debug_displays.rs

@@ -0,0 +1,16 @@
+use display_info;
+
+fn main() {
+    match display_info::DisplayInfo::all() {
+        Ok(displays) => {
+            println!("Found {} displays:", displays.len());
+            for (index, display) in displays.iter().enumerate() {
+                println!("  Display {}: ID={}, Scale={}, Width={}, Height={}", 
+                    index, display.id, display.scale_factor, display.width, display.height);
+            }
+        }
+        Err(e) => {
+            println!("Error getting display info: {}", e);
+        }
+    }
+}