Only highlight patterns inside comments

[srbdev]

Problem

Currently, patterns like TODO: are highlighted anywhere they appear in a file, including:

• String literals: const msg = "TODO: fix this later"
• Variable names: const TODO_CONFIG = {}
• URLs or other content

This can create visual noise and false positives.

Proposed Solution

Use VS Code's DocumentSemanticTokensProvider or TokenInformation API to determine if a match is within a comment before applying the decoration.

Alternatively, use a simple heuristic: only highlight if the pattern appears after a comment prefix (//, #, /*, --, etc.) on the same line.

Trade-offs

• Semantic tokens: More accurate, but depends on language support and may have performance implications
• Heuristic: Simpler and faster, but may miss some edge cases (e.g., multi-line comments)