0.5.1

• Declare the Obsidian APIs the plugin actually relies on, and raise minAppVersion to 1.7.2 to match (revealLeaf, FileManager.trashFile, setTooltip).
• Keep the sidebar leaf in place when the plugin unloads, so Obsidian remembers a user-moved sidebar position.
• Use FileManager.trashFile() instead of Vault.delete() when removing an emptied annotation file, so the user's trash preference is respected.
• Build DOM elements with Obsidian's createEl/createDiv/createSpan helpers instead of document.createElement.
• Use a settings heading via Setting.setHeading() and drop the deprecated setDynamicTooltip() call.
• Rename the open-sidebar command ID to open-sidebar; Obsidian already namespaces command IDs with the plugin ID.
• List @codemirror/state and @codemirror/view as dependencies, as they are runtime imports.