Merge pull request #44 from ktnyt/refactor

test: fix Windows path compatibility in multi-position.test.ts

test: fix Windows path compatibility in test fixtures

test: fix env var cleanup for Windows CI compatibility

test: fix Windows compatibility in test files

docs(P2-I): update architecture and sequence diagrams for post-refactor

test(P2-I): add unit tests for 4 extracted src/lsp/ modules

refactor(P2-H): replace concrete class imports with structural types in ServerState

test(P2-H): rewrite 3 stale test files to test actual tool handlers

style: fix formatting in adapter files (single quotes)

refactor(P2-G): delete adapters/types.ts shim, update imports

fix(P2-F): commit pending fixes — isError bug, remove global error handlers

feat(P2-E): add graceful degradation for LSP server failures

fix(P2-D): fix server-selection tests failing due to env var override

fix(P2-C): replace hardcoded version with dynamic package.json read