fix: tree uri output error, and validate ov.conf before start

[MaojiaSheng]

Description

Related Issue

Type of Change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Refactoring (no functional changes)
• Performance improvement
• Test update

Changes Made

• fix: tree uri output error

Testing

• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• I have tested this on the following platforms:
  • Linux
  • macOS
  • Windows

Checklist

• My code follows the project's coding style
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• Any dependent changes have been merged and published

Screenshots (if applicable)

openviking tree viking://agent
uri                                 size  isDir    modTime    abstract
viking://agent/instructions          128  True     20:41:51   Agent instruction set. Contains Agent's behavioral directives, rules, and constraints.
viking://agent/memories              192  True     20:41:51   Agent's long-term memory storage. Contains cases and patterns, managed hierarchically by type.
viking://agent/memories/cases        128  True     20:41:51   Agent's case records. Stores specific problems and solutions, new problems and resolution processes encountered in each inter...
viking://agent/memories/patterns     128  True     20:41:51   Agent's effective patterns. Stores reusable processes and best practices distilled from multiple interactions, validated gene...
viking://agent/skills                128  True     20:41:51   Agent's skill registry. Uses Claude Skills protocol format, flat storage of callable skill definitions.

Additional Notes