v1.4.2

Optimized the WebShell management UX with a focus on clarity, consistency, and workflow efficiency:

Upgraded the database schema tree to support hierarchical expansion (database -> table -> columns) with smarter auto-loading and reduced redundant requests.
Improved long-name handling in schema navigation (ellipsis + hover tooltip) and removed disruptive horizontal scrolling.
Fixed schema/column rendering edge cases, including refresh-state inconsistencies and error/history display mismatches.
Added a persistent Memo feature as a dedicated tab in WebShell, with local SQLite-backed state saving and improved editor styling.
Refined UI polish across AI/DB/Memo areas (better layout behavior, status feedback, and multilingual text updates) for a smoother day-to-day operation experience.