FerrisPad v0.9.2

Added

• OnTextChanged Hook: New plugin hook with 300ms debounce for reacting to text edits.
• SplitPane Read-Only Mode: Split view panels can now be set as read-only.
• Integration Test Suite: 8 new integration test suites (diff/highlights, Lua sandbox, plugin loading/security/verify chains, session roundtrip, settings persistence, shortcut registry).
• Library Crate: Exposed ferris_pad lib crate for integration testing.

Fixed

• Plugin Menu Entries on Global Disable: Menu entries now properly disappear when plugins are globally disabled.
• Format Menu Visual Update: Font and size changes from the Format menu now visually update highlighted text immediately.

Changed

• Controller Extraction: Split AppState from 2,799 → 1,053 lines (~62% reduction) by extracting FileController, HighlightController, WidgetController, PluginController, SessionController, and ViewController.
• Dispatch Refactor: Extracted grouped handler functions from main.rs into dispatch.rs, eliminating ~1,195 net lines of dead/duplicated code.
• Lazy Syntect Loading: Deferred syntax set initialization reduces idle RSS by ~10 MB (39 → 29 MB).
• Plugin API Modularization: Split plugins/api.rs into sub-modules (commands, editor, filesystem, sandbox).
• Security Audit: Audited plugin API against PHILOSOPHY.md and SECURITY.md; added SAFETY comments to all unsafe blocks.
• Updated SECURITY.md: Reflects v0.9.2 status — permission system, signed plugin downloads, and plugin manager all marked as done.
• Fixed all clippy warnings across the codebase.