Changes since Phon 4.0.0-beta.1

Appearance & Theming

FlatLaf look and feel installed as the default UI theme, with light/dark/system variants.
Appearance preferences added to the General preferences pane (light / dark / system).
Dark-mode-aware application icon at startup.
IPA Chart, buffers, script parameter panels, and progress bars now use theme-aware colors (no more hard-coded black/white in dark mode).
Welcome page strip color adapts to the active theme.

Welcome Window

Redesigned recent-projects and workspace views using elevated project cards.
Blue-tinted card backgrounds with stable IPA glyph positioning across resizes.
Actions sidebar given a gradient surface treatment.
Double-click anywhere on a card opens the project.
Right-click context menus on cards for secondary actions (reliable scrolling / popups fixed).
Long project names and paths now elide so narrow cards remain usable.
50/50 split between recent projects and workspace is enforced and no longer shifts after show.

Timeline & Waveform

New RMS-based waveform rendering with a scroll-invariant cache (smoother, less jitter).
Smooth follow-scroll during segmentation and playback, with velocity-aware scroll capping.
Auto-adjusting RMS resolution tied to waveform zoom; rebuild is double-buffered to avoid flicker.
Toggle between mixed mono and stereo waveform views.
Opt-out per segment for RMS tier auto-adjust (via segment popup).
Fixed envelope clipping glitch when painting near viewport edges.

Session Editor & Data

Project Window

Project tree refreshes automatically after project mutations (listens to ProjectEvents).
No more flicker or selection loss on focus changes — refresh is skipped when the tree signature is unchanged.
Both the new and legacy project windows share the same refresh path.

Reliability & Performance

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