feat(admin): live log viewer and searcher in log files page

[Rhefew]

Live Log Viewer & Searcher in Admin Panel

Implements an in-browser live log viewer and search tool directly within the Admin Panel's Log Files page.

Key Features

1. Side-by-Side Layout: Selecting a log file resizes the file table and displays the terminal alongside it without leaving the page.
2. Live Auto-Refresh: Switchable live mode that automatically pulls incoming log entries every 2 seconds.
3. Instant Search & Filter: Filter log entries in real-time by text (case-insensitive) with matching highlight styling.
4. Log Level Color Coding:
   • Errors / Critical: Red bold text
   • Warnings: Yellow text
   • Debug: Muted italic text
   • Information: Green text
5. Auto-Scroll & Fast Read: Reads the trailing lines of the target log file and automatically scrolls down to the newest entries upon refresh.

Code Quality & Guidelines

• Uses static helper methods for string formatting and line parsing.
• Adheres to OpenMU this. qualification standards and ConfigureAwait(false) async conventions.
• Zero compiler warnings or errors.