v1.2.0

Added

• Welcome screen — when no document is open, Sable shows a welcome/tips screen with recent files
  and quick how-to tips. Toggle it in Preferences (and via "Show this welcome screen").
• Contextual task bar — a small action bar with the most relevant actions for what you're doing
  (Gen Fill, Mask, Invert, Deselect). Toggle from the Window menu.
• Radial quick-tools menu — press ` to pop a radial tool picker at the cursor.
• Navigator panel — a zoomable thumbnail of the whole document for fast panning.
• Keyboard Shortcuts window (Help ▸ Keyboard Shortcuts) — a printable reference of every tool and
  canvas shortcut.
• Pass-through groups — a group can now composite straight onto the layers below it, so adjustments
  and filters placed inside the group affect everything underneath (toggle per group).
• Gradient Map adjustment — remap tones through a gradient.
• Blend If — in Layer Effects, hide a layer where the layers below are darker or brighter (shadow
  and highlight ranges, on the underlying composite).
• Gradient tool shapes — Linear, Radial, Conical, Reflected and Diamond (was linear only).
• Brush dynamics and presets — stroke smoothing (stabilizer), dab spacing, and stylus
  pressure → size / pressure → flow for tablets, plus saveable brush presets (size/hardness/flow/
  spacing/pressure).
• Place… (File menu) to add an image as a new layer, plus Revert, Close, Close All and
  Close Others.
• Edit menu: Paste in Place, Fill with Foreground and Fill with Background.
• Copy / Paste / Clear layer effects from the layer context menu.
• Math in numeric fields — type an expression like 100*2 or 50+10 into size/amount boxes.
• Animated splash screen at startup.

Changed

• Non-destructive crop — the Crop tool gains aspect-ratio presets and a Delete pixels toggle.
  With it off, layers keep the content outside the crop, so you can enlarge the canvas later to
  un-crop.
• Selection ▸ Grow / Shrink / Smooth / Border / Feather now ask for an amount instead of being
  fixed at 4 px.
• Hold \ to compare — temporarily view the image with all adjustments and live filters hidden.
• More zoom presets (50% / 200%) and quick panel-visibility toggles (Tools / Colour / Layers).
• Status bar shows memory use — app working set and GPU VRAM in use.
• History panel — drag to scrub through the edit history.
• Esc closes dialogs consistently across every dialog, and middle-clicking a document tab closes
  it.
• Ungroup now has a menu entry, and the layer list can be filtered by name.

Full Changelog: v1.1.2...v1.2.0