Touch ID, document search, and direct links

Added

• Unlock secrets with Touch ID, with a PIN fallback.
• Find text in documents with Cmd+F.
• Save the active editor with Cmd+S.
• Copy direct links to projects and individual items, and open them in Orbit.
• View GitHub Dependabot alerts alongside repository activity.

Changed

• Task context menus are now available in the project overview.
• Improved keyboard navigation, focus indicators, and form error messages.

Fixed

• Download updates and restart Orbit directly from the sidebar, with protection for unsaved work.
• Preserve scratchpad drafts when connected assistants edit the same notes.
• Preserve folder structure when importing Markdown documents.
• Keep task columns within the window so long lists scroll correctly.
• Restore access to workspace files after a disk is remounted.
• Improve dependency security check coverage, severity ratings, and recovery after failed checks.