v1.0.10: Custom Theme Studio & Perceptual Color Engine

Custom Theme Studio release: perceptual color theory engine, 6 harmony mood styles, 15 designer presets, magic dice generator, JSON theme import/export, and dedicated Settings sub-navigation tabs.

Added

• Custom Theme Studio: introduces a dedicated workspace inside Settings enabling users to design, fine-tune, and apply personalized themes without manual configuration of dozens of individual hex codes.
• Perceptual Color Theory Engine (color_engine.py):
  • Implements hue-dependent brightness bias compensation (hue_lightness_bias) and perceptual lightness tuning, ensuring high-luminance hues (amber, yellow, lime) avoid blinding glare while deep blues and violets maintain rich vibrancy.
  • Enforces strict WCAG 2.1 AA/AAA contrast guidelines (minimum 7:1 text contrast and 4.5:1 UI contrast) with automated lightness correction (ensure_contrast).
  • Generates complete 27-token palettes mapping chosen signature colors across stratified background levels (window, panel, surface, surface2, elevated, border, border2), semantic states (success, warning, danger, review, info, selection), and typography.
• 6 Palette Harmony Mood Styles:
  • Cohesive (default balanced surface tinting with 14% primary saturation)
  • Vibrant (high-energy saturated surfaces and neon accents)
  • Muted (subdued slate undertones for low-profile visual focus)
  • OLED Pure (true #000000 deep black canvas with stratified dark panels and glowing accent highlights)
  • Pastel (soft, airy low-saturation tones)
  • Minimal (clean monochromatic neutral greys with single accent focus)
• 15 Curated Designer Color Presets: one-click curated palettes (Sapphire Blue, Emerald Forest, Cyber Violet, Sunset Amber, Crimson Velvet, Rose Gold, Hyper Cyan, Deep Slate, Mint Sage, Solar Orange, Royal Indigo, Cherry Blossom, Arctic Frost, Matrix Lime, Espresso Gold).
• Color Harmonies & Magic Dice Generator:
  • generate_color_harmonies computing Analogous ($H \pm 30^\circ$), Complementary ($H + 180^\circ$), Triadic ($H \pm 120^\circ$), and Split-Complementary variations.
  • "Surprise Me (Magic Dice)" rolling harmonious, randomized palettes across curated hues and mood formulas on demand.
• Theme JSON Export & Import:
  • Serialization and parsing tools (export_custom_theme_json, import_custom_theme_json) with clipboard copy and modal import dialog for sharing themes.
• Interactive Multi-View Live Preview:
  • Live preview card featuring switchable views: Mockup Overview, Clean-up Queue Table, and 27-Token Palette Matrix with live contrast ratio badge meter (AAA, AA, LOW).
• Dedicated Sub-Navigation Tabs in Settings:
  • Clean separation into Theme Gallery and Custom Theme Studio, providing full viewport height for both browsing 40+ built-in themes and designing custom themes.
  • Added "Custom Studio" shortcut button on the active theme hero banner.

Fixed

• Table Column Sorting Recursion Error: resolved RecursionError in PySide6 NumericItem during table column sorting by isolating numerical sort values to Qt.ItemDataRole.UserRole + 99 and handling string fallbacks safely.
• Mnemonic Accelerator Underscore Artifacts: escaped ampersands in button labels (Apply && Save Custom Theme) and enforced Qt.TextFormat.PlainText on labels to prevent unwanted mnemonic accelerator parsing.
• Live Theme Application on Color Pick: instant real-time visual application across the entire application upon selecting a color or changing tuning sliders.

Full Changelog: v1.0.9.1...v1.0.10