feat: 3 neue shader (vibrance, grayscale, invert) auf F7-F9, blaulicht-duplikat entfernt

config/hypr/shaders/vibrance.glsl

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+#version 300 es
+precision highp float;
+
+in vec2 v_texcoord;
+uniform sampler2D tex;
+out vec4 fragColor;
+
+// Farben satter machen (Stärke: positiv = mehr, negativ = weniger)
+const vec3 Balance = vec3(1.0, 1.0, 1.0);
+const float Strength = 0.3;
+const vec3 VIB_coeffVibrance = Balance * -Strength;
+
+void main() {
+    vec4 pixColor = texture(tex, v_texcoord);
+    vec3 color = pixColor.rgb;
+
+    vec3 VIB_coefLuma = vec3(0.212656, 0.715158, 0.072186);
+    float luma = dot(VIB_coefLuma, color);
+
+    float max_color = max(color.r, max(color.g, color.b));
+    float min_color = min(color.r, min(color.g, color.b));
+    float color_saturation = max_color - min_color;
+
+    vec3 p_col = (sign(VIB_coeffVibrance) * color_saturation - 1.0) * VIB_coeffVibrance + 1.0;
+    fragColor = vec4(mix(vec3(luma), color, p_col), pixColor.a);
+}