Refactor getCursorFromHashParams function to reduce complexity

[coderabbitai]

Issue Description

The getCursorFromHashParams function in src/utils/url/urlHash.ts has been flagged by ESLint for exceeding the maximum number of statements (max-statements rule). An ESLint disable comment was added as a temporary workaround, but the function should be refactored to improve readability and maintainability.

Current State

The function currently handles multiple responsibilities:

• URL hash parameter validation
• State updates for view and log file manager
• Cursor creation for different navigation scenarios
• Error handling

Suggested Refactoring

Consider breaking down the function into smaller, more focused functions such as:

• Parameter validation and clamping
• State update logic
• Cursor creation logic
• Individual handlers for different cursor types

Context

This issue was identified during code review of PR #359 where the ESLint disable comment was added.

Backlinks:

• PR: feat(MenuBar): Add timestamp query input for jumping to log events by UTC timestamp (resolves #118). #359
• Comment: feat(MenuBar): Add timestamp query input for jumping to log events by UTC timestamp (resolves #118). #359 (comment)