Snapmaker Orca FullSpectrum v0.95

Mixed-color workflow improvements, Snapmaker 2.3.1 sync, and release polish. Based on Snapmaker Orca v2.3.1.

Quick Overview

Rebased the fork onto the newer Snapmaker Orca 2.3.x line and updated the base to 2.3.1.
Improved mixed-color generation so it can find better color matches and manage gradients more cleanly.
Added more control over how infill uses filaments, including first-layer and last-layer behavior.
Reduced fragmentation in painted mixed-color areas by collapsing same-color regions where possible.
Refreshed release branding with the Snapmaker Orca FullSpectrum name, updated About dialog information, and the new FS app icon.

Synced FullSpectrum with the Snapmaker 2.3.0 update path and bumped the base version to Snapmaker Orca 2.3.1.
Pulled in a wide set of upstream Linux, macOS, packaging, Flutter-resource, and web/download-flow fixes from the Snapmaker 2.3.x branch.
Included the OpenVDB clang patch fix from PR #66.
Kept the fork release flow focused on the fork itself, including the fork release link in the README and Windows portable packaging for releases.

Added a brute-force color mixer path that can search for closer 2-, 3-, or 4-filament combinations from the selected physical filaments.
Added min_component_percent validation so suggested mixes stay within more useful and realistic component ranges.
Added controls for auto-generated mixed filament gradients, including preference handling and guardrails for very large generated sets.
Added an explicit infill filament override setting so infill can use a different filament without relying on implicit behavior.
Added per-layer control to keep base filament on the first and last layers before switching infill to the override filament.
Added support for collapsing same-color mixed filament regions across painted areas so equivalent output colors can slice as larger continuous regions instead of separate islands.
Added additional Local-Z and mixed-filament slicing fixes plus broader regression coverage in tests.

Fixed the .gcode.3mf filename issue.
Fixed wipe tower brim behavior inherited from the 2.2.3 line.
Added and expanded tests around mixed filament handling, slicing behavior, and output generation.
Updated visible app branding to Snapmaker Orca FullSpectrum.
Updated the About page to show both the Snapmaker Orca base version and the FullSpectrum fork version.
Replaced the app icon set with the new FS branding assets.

This release has been tested on actual hardware.
macOS builds from this fork remain unsigned and not notarized.
Release downloads for this fork are available here: https://github.com/ratdoux/OrcaSlicer-FullSpectrum/releases