fix: use NSApplication.shared for proper WindowServer connection

Sources/ScreenTextKit/Capture/DaemonRunner.swift

@@ -27,6 +27,10 @@ public final class DaemonRunner {
     }
 
     public func run() -> Never {
+        // FIX: Register with WindowServer for proper screen capture
+        let app = NSApplication.shared
+        app.setActivationPolicy(.accessory)
+
         observer = NSWorkspace.shared.notificationCenter.addObserver(
             forName: NSWorkspace.didActivateApplicationNotification,
             object: nil,
@@ -55,7 +59,7 @@ public final class DaemonRunner {
         capture(trigger: .manual)
         logger.info("Daemon started")
 
-        RunLoop.main.run()
+        app.run()
         fatalError("Run loop exited unexpectedly")
     }
 

Sources/ScreenTextKit/Capture/FrameBufferStore.swift

@@ -14,8 +14,8 @@ public final class FrameBufferStore {
         paths: ScreenTextPaths,
         retentionSeconds: Int,
         maxFrames: Int,
-        maxDimension: Int = 1280,
-        jpegQuality: Double = 0.45
+        maxDimension: Int = 2560,
+        jpegQuality: Double = 0.85
     ) {
         self.paths = paths
         self.retentionSeconds = retentionSeconds

Sources/ScreenTextKit/Capture/NativeTextExtractor.swift

@@ -27,19 +27,25 @@ public final class NativeTextExtractor: TextExtractor {
     public func extract() throws -> ExtractedText? {
         let metadata = metadataProvider.currentMetadata()
 
-        if !forceOCR {
-            if let accessibilityText = accessibilityExtractor.extractText(),
-               accessibilityText.count >= minimumAccessibilityChars {
-                return ExtractedText(text: accessibilityText, source: .accessibility, metadata: metadata)
-            }
-        }
+        let accessibilityText = accessibilityExtractor.extractText()
+        let hasGoodAccessibility = (accessibilityText?.count ?? 0) >= minimumAccessibilityChars
 
-        guard ocrEnabled else {
-            return nil
+        // Always run OCR too (if enabled) and keep the longer result
+        var ocrText: String? = nil
+        if ocrEnabled {
+            ocrText = try ocrExtractor.extractText()
         }
 
-        if let ocrText = try ocrExtractor.extractText(), !ocrText.isEmpty {
-            return ExtractedText(text: ocrText, source: .ocr, metadata: metadata)
+        let accLen = accessibilityText?.count ?? 0
+        let ocrLen = ocrText?.count ?? 0
+
+        // Return whichever extracted more text
+        if ocrLen > accLen && ocrLen > 0 {
+            return ExtractedText(text: ocrText!, source: .ocr, metadata: metadata)
+        } else if accLen > 0 && hasGoodAccessibility {
+            return ExtractedText(text: accessibilityText!, source: .accessibility, metadata: metadata)
+        } else if ocrLen > 0 {
+            return ExtractedText(text: ocrText!, source: .ocr, metadata: metadata)
         }
 
         return nil

Sources/ScreenTextKit/Capture/OCRTextExtractor.swift

@@ -1,4 +1,5 @@
 import CoreGraphics
+import CoreImage
 import Foundation
 import ImageIO
 import Vision
@@ -7,7 +8,7 @@ public final class OCRTextExtractor {
     private let minimumTextHeight: Float
     private let recognitionLevel: VNRequestTextRecognitionLevel
 
-    public init(minimumTextHeight: Float = 0.005, recognitionLevel: VNRequestTextRecognitionLevel = .accurate) {
+    public init(minimumTextHeight: Float = 0.002, recognitionLevel: VNRequestTextRecognitionLevel = .accurate) {
         self.minimumTextHeight = minimumTextHeight
         self.recognitionLevel = recognitionLevel
     }
@@ -17,7 +18,24 @@ public final class OCRTextExtractor {
             return nil
         }
 
-        return try extractText(from: image)
+        // Run OCR on both original and inverted image, keep the one with more text.
+        // Dark UIs (WhatsApp, Slack, etc.) yield much more text when colors are inverted.
+        let originalText = try extractText(from: image)
+        let invertedText: String?
+        if let inverted = invertColors(image) {
+            invertedText = try extractText(from: inverted)
+        } else {
+            invertedText = nil
+        }
+
+        let orig = originalText ?? ""
+        let inv = invertedText ?? ""
+
+        if orig.isEmpty && inv.isEmpty {
+            return nil
+        }
+
+        return inv.count > orig.count ? inv : orig
     }
 
     public func extractText(fromImageURL imageURL: URL) throws -> String? {
@@ -54,4 +72,15 @@ public final class OCRTextExtractor {
 
         return lines.joined(separator: "\n")
     }
+
+    /// Invert image colors using CoreImage — turns dark UIs light for better OCR
+    private func invertColors(_ image: CGImage) -> CGImage? {
+        let ciImage = CIImage(cgImage: image)
+        guard let filter = CIFilter(name: "CIColorInvert") else { return nil }
+        filter.setValue(ciImage, forKey: kCIInputImageKey)
+        guard let output = filter.outputImage else { return nil }
+
+        let context = CIContext(options: [.useSoftwareRenderer: false])
+        return context.createCGImage(output, from: output.extent)
+    }
 }