Summary

Fix LSP tools failing on Windows with "unresolvable URI" error.

Fixes #684

Changes

1. src/tools/lsp/client.ts

Use pathToFileURL() from node:url instead of string template for file URIs:

// Before (broken on Windows)
const rootUri = `file://${this.root}`
textDocument: { uri: `file://${absPath}` }

// After (works on all platforms)
import { pathToFileURL } from "node:url"
const rootUri = pathToFileURL(this.root).href
textDocument: { uri: pathToFileURL(absPath).href }

Why: On Windows, file://${path} generates invalid URIs like file://E:\path instead of file:///E:/path.

2. src/tools/lsp/utils.ts

Fix findWorkspaceRoot() loop condition:

// Before (Unix only)
while (dir !== "/")

// After (cross-platform)
let prevDir = ""
while (dir !== prevDir)

Why: On Windows, the root is C:\ not /, so the original condition never terminates properly.

Testing

Tested on Windows 11 with clangd 21.1.8:

• ✅ lsp_hover - works
• ✅ lsp_document_symbols - works
• ✅ lsp_goto_definition - works
• ✅ lsp_find_references - works
• ✅ lsp_prepare_rename - works
• ✅ lsp_workspace_symbols - works
• ✅ lsp_diagnostics - works
• ✅ lsp_code_actions - works