Polish SpoolBuddy boot splash and reduce initramfs rebuilds

New splash shows only the SpoolBuddy logo with green glow bloom,
  radial gradient, light rays, and vignette. Removed Bambuddy branding.
  Includes generator script for easy customization.

  Defers initramfs rebuild during install until after Plymouth theme
  is configured, avoiding redundant rebuilds from apt hooks.

spoolbuddy/install/generate_splash.py

@@ -18,15 +18,15 @@ from PIL import Image, ImageDraw, ImageFilter
 
 # --- Configuration ---
 WIDTH, HEIGHT = 1024, 600
-BG_CENTER = (45, 45, 45)  # Brighter center for more visible gradient
-BG_EDGE = (5, 5, 5)  # Darker edges for stronger contrast
-ACCENT = (0, 174, 66)  # SpoolBuddy green (#00AE42)
-ACCENT_GLOW = (0, 220, 85)  # Brighter glow core
+BG_CENTER = (55, 55, 55)  # Notably lighter center
+BG_EDGE = (2, 2, 2)  # Nearly black edges
+ACCENT = (0, 200, 75)  # Brighter SpoolBuddy green
+ACCENT_GLOW = (0, 255, 100)  # Vivid glow core
 LOGO_SCALE = 0.50  # Scale logo to 50% of canvas width
-GLOW_RADIUS = 120  # Wider glow spread
-VIGNETTE_STRENGTH = 0.70  # Stronger edge darkening
-RAY_COUNT = 24  # Number of radial light rays
-RAY_OPACITY = 28  # More visible rays (0-255)
+GLOW_RADIUS = 160  # Very wide glow spread
+VIGNETTE_STRENGTH = 0.85  # Heavy edge darkening
+RAY_COUNT = 32  # More radial light rays
+RAY_OPACITY = 50  # Clearly visible rays (0-255)
 
 
 def radial_gradient(size, center_color, edge_color):
@@ -179,15 +179,20 @@ def generate_splash(output_path):
     # 4. Glow behind logo (two layers: wide diffuse + tight bright)
     print("  Rendering glow effects...")
 
-    # Wide diffuse glow
-    glow_wide = create_glow(logo, ACCENT, radius=GLOW_RADIUS, intensity=2.0)
-    # Expand glow canvas to full size
+    # Wide diffuse glow — very prominent
+    glow_wide = create_glow(logo, ACCENT, radius=GLOW_RADIUS, intensity=3.0)
     glow_canvas = Image.new("RGBA", (WIDTH, HEIGHT), (0, 0, 0, 0))
     glow_canvas.paste(glow_wide, (logo_x, logo_y), glow_wide)
     canvas = Image.alpha_composite(canvas.convert("RGBA"), glow_canvas)
 
-    # Tighter brighter glow
-    glow_tight = create_glow(logo, ACCENT_GLOW, radius=GLOW_RADIUS // 3, intensity=1.5)
+    # Medium glow layer for extra punch
+    glow_mid = create_glow(logo, ACCENT_GLOW, radius=GLOW_RADIUS // 2, intensity=2.5)
+    glow_canvas_mid = Image.new("RGBA", (WIDTH, HEIGHT), (0, 0, 0, 0))
+    glow_canvas_mid.paste(glow_mid, (logo_x, logo_y), glow_mid)
+    canvas = Image.alpha_composite(canvas, glow_canvas_mid)
+
+    # Tighter bright glow core
+    glow_tight = create_glow(logo, ACCENT_GLOW, radius=GLOW_RADIUS // 4, intensity=2.0)
     glow_canvas2 = Image.new("RGBA", (WIDTH, HEIGHT), (0, 0, 0, 0))
     glow_canvas2.paste(glow_tight, (logo_x, logo_y), glow_tight)
     canvas = Image.alpha_composite(canvas, glow_canvas2)