Enable PatchVaultFile to apply multiple patches in a single operation by converting oldContent and newContent from strings to arrays. Add whitespace-flexible regex matching as fallback when exact string matching fails, improving robustness for code with varying indentation. Update schemas, tool definitions, and all tests to reflect the new array-based API.
Migrate attachment storage from base64-in-JSON to separate binary files with SHA-256 naming, add automatic garbage collection, implement lazy loading via getBase64() and getMimeType() methods, normalize text MIME types, add image resizing, and update all AI provider integrations. Fix small issue that caused the chat area to scroll down on message streaming end even when scrolled up.
Move isValidJson, dateToString, and escapeRegex from Helpers to new StringTools class. Add asRegex method for parsing regex literals with /pattern/flags format. Update all imports and usages across codebase.
