v0.2.79

Added

• Finder file-open — double-clicking a .ff file in Finder now opens it in the app. Handles both cold launch (stashes URL for determineInitialState()) and hot open (flushes current project first). Includes duplicate Apple Event detection and integrity error UI.

Fixed

• Data loss on quit, close, and zoom — replaced withCheckedContinuation with native async evaluateJavaScript in BlockSyncService (5 call sites); added 5s poll timeout to prevent permanent hangs; applicationShouldTerminate now fetches fresh JS content (2s timeout) before flushing blocks, sections, and annotations synchronously
• Annotation data loss during zoom — guarded annotation sync in flushAllSync() and flushAllPendingContent() to prevent deleting annotations outside the zoomed section's range
• Redundant flush on quit — didFlushForQuit flag prevents applicationWillTerminate from re-flushing after applicationShouldTerminate already saved
• Project open validates before closing — openProject() and forceOpenProject() now validate the new project's database integrity before closing the current one, preserving the user's work if the new file is corrupt
• Re-entrant open guard — hasCompletedInitialOpen prevents macOS state restoration and SwiftUI .task re-fires from triggering duplicate project opens during launch