Frontend corrections: Fix job details display, file management bugs, and authentication state

[Copilot]

This PR addresses multiple frontend issues to improve user experience and fix several bugs in the DECODE Cloud UserFrontend application.

Job Details Tree Improvements

Enhanced the job details display to show human-readable field names instead of technical snake_case/camelCase names. For example:

• date_created → Date Created
• applicationName → Application Name
• user_id → User Id

The prettification handles both snake_case and camelCase formats automatically.

File Management Fixes

• Folder creation timing: Added proper async/await handling to prevent errors when opening newly created folders too quickly
• Directory rename preservation: Fixed bug where renaming a folder without trailing "/" would convert it to a file - the system now automatically preserves the directory nature by adding the implicit "/"
• Navigation reset: Clicking "Files" or "Jobs" menu items now properly resets to the root state, reloading the page when already on that view

Authentication State Persistence

Fixed the bug where reloading the page on Files/Jobs views would incorrectly redirect to login even when the user was still authenticated. The application now properly restores authentication state on startup.

Job Submission Improvements

• Environment dropdown: Fixed the "any" option value binding to prevent submission errors when switching between environment options
• Directory-only selection: Modified config and data file selection to only show directories, preventing selection of individual files which could cause job configuration issues

All changes maintain backward compatibility and preserve existing functionality while addressing the reported issues with minimal code modifications.

Fixes #6.

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