fix(affected): BFS never starts — _build_import_graph keys don't match input path

[Wolfvin]

Root Cause (verified)

PR #184 fixed the workspace-as-first-arg heuristic in commands/affected.py.
But get_affected_files still returns affected_count: 0 because _build_import_graph
produces keys that don't match the input path.

Investigation needed:

1. Print all_known_files from _build_import_graph — what keys does it actually produce?
2. Print cf_rel (normalized input path) — does it match any key?
3. Check _parse_js_imports regex — does it resolve .ts extensions correctly?

Likely: _build_import_graph either (a) still produces backslash keys on Windows
for some code paths not covered by PR #184's normalization, or (b) the regex
import parser doesn't match TS import paths (imports use './google-auth-cache'
without .ts extension, resolver needs to try adding .ts/.js).

Definition of Done

• codelens affected /ts-workspace "auth/google-auth-cache.ts" returns affected_count > 0
  for a workspace where other files import from that file
• unresolved[] is empty when input file exists and is imported by other files
• Use existing ts_workspace fixture in tests/test_affected_command.py (from PR fix(affected): resolve TypeScript workspaces + path normalization (closes #176) #184)
  and assert affected_count >= 1

[Wolfvin]

Mengerjakan issue ini -- 2026-07-03T14:38:34Z

[Wolfvin]

PR siap review

PR: #192 -- fix(affected): parse multi-line, side-effect, and re-export imports (closes #189)
Branch: fix/issue-189-affected-bfs-keys
Summary: Root cause bukan di path normalization (itu sudah fixed di PR #184) — tapi di _parse_js_imports regex yang skip 3 pola TS/JS umum: (1) multi-line imports (.*? tidak cross newlines), (2) side-effect imports import './x' (regex wajib from), (3) re-exports export { x } from './bar' (regex hanya match import). Akibatnya reverse_graph incomplete → BFS start tapi tidak ada edge → affected_count: 0. Fix: ganti .*? → [\s\S]*?, tambah 2 regex baru. 5 test baru, 4 fail-on-main, 5 pass-after-fix.
Tests: 63 passed (test_affected_command), 44 passed (command_registry + command_count + doctor), 151 passed + 5 skipped (parser + formatter + orient). 0 failed. test_cli scan timeout = pre-existing di main (verified via stash).