Test: File path and line number linkification

[vijayupadya]

Refs: #276767

• anyOS @lszomoru
• anyOS @connor4312

Complexity: 3

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Background

This sprint, file path linkification link generation is moved upstream to the model so it emits canonical, machine‑parsable Markdown links reducing reliance on heuristic fallback and enabling precise line anchors. Linkification falls back to current component if model does not handle it.

This also ensure consistent behavior across all model families (OpenAI/GPT‑5, Anthropic/Claude, etc.) while eliminating duplicated prompt text.
Links with line numbers are generated for single line and multi line range references for all models.

Below is example of how line number linkified references show up:

Test Steps:

Try below on different models (OpenAI, Anthropic, Gemini)

1. Large code base
   On large codebase like VSCode try prompts that will generate filepath and line numbers and verify file path and line numbers are correctly linkified and files do open correctly with cursor pointing to referenced line number.

E.g.

• Give me locations of where function getDefaultAgent is called
• Explain chatservice.ts
• List key config files

2. Multi workspace
   Open a multi workspace folder and ask for files that will trigger search on files with same names across workspace.
   e.g. in typescript workspaces, ask for showing where dev dependency on react is defined (this should refer package.json from multiple workspace and correctly linkify it)

3. Do exploratory testing, and validate the file paths and line numbers are correctly linkified. Try it out on languages apart from typescript (e.g. Python).