v0.2.0

What's new

• Mermaid diagrams render inline as real diagrams instead of raw fenced code. Flowchart, sequence, class and state diagrams are supported. Rendering happens in-process via Naiad — no WebView, no Node, no network call.
• sample.md ships compact flowchart, sequence and state examples so the feature is visible the moment you open it.
• README acknowledges the open-source projects MarkMello depends on (Naiad, Mermaid).

Fixed

• macOS: double-clicking a Markdown file in Finder now opens it in MarkMello — both at cold start and when the app is already running. Previously the file was silently ignored on macOS because Finder uses Apple Events instead of argv.
• Windows: double-clicking the custom title bar toggles maximize / restore (single-click drag still works).
• Windows: Debug builds no longer attach a visible console window.
• SVG rgba(…) and hsl(…) colours from Naiad output now render correctly — fixes black squares behind flowchart edge labels.
• Installers (.exe / .dmg) no longer ship .pdb debug files — significantly smaller artefacts.

Under the hood

• Solution targets .NET 10 (required for the Naiad-based Mermaid renderer).

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Thanks to @Alex-ok2005 for the Windows shell fixes in #6.