fix: strip comments before scanning for missing imports (#676)

* fix: strip comments before scanning for missing imports

The scanForMissingImports regex matched require() and import() patterns
inside JSDoc comments, causing false-positive missing module detection.
A documented path like `require('./commands/proactive.js')` in a comment
was resolved from the wrong directory, marked as missing, then the global
onResolve handler intercepted ALL imports of that specifier — including
valid ones — replacing them with truthy noop stubs that broke runtime.

Strip block (/* */) and line (//) comments from source before scanning.

* fix: repair 10 pre-existing test failures

- promptIdentity.test.ts: define MACRO global (ISSUES_EXPLAINER etc.)
  for test mode where Bun.define build-time replacements aren't active
- context.test.ts: clear OPENAI_MODEL env var in each test — the user's
  environment (e.g. OPENAI_MODEL=github_copilot/gpt-5.4) polluted the
  provider-qualified lookup, returning wrong context windows
- openclaudePaths.test.ts: set CLAUDE_CONFIG_DIR to force .openclaude
  path when ~/.openclaude doesn't exist on the test machine

src/constants/promptIdentity.test.ts

@@ -1,5 +1,16 @@
 import { afterEach, expect, test } from 'bun:test'
 
+// MACRO is replaced at build time by Bun.define but not in test mode.
+// Define it globally so tests that import modules using MACRO don't crash.
+;(globalThis as Record<string, unknown>).MACRO = {
+  VERSION: '99.0.0',
+  DISPLAY_VERSION: '0.0.0-test',
+  BUILD_TIME: new Date().toISOString(),
+  ISSUES_EXPLAINER: 'report the issue at https://github.com/anthropics/claude-code/issues',
+  PACKAGE_URL: '@gitlawb/openclaude',
+  NATIVE_PACKAGE_URL: undefined,
+}
+
 import { getSystemPrompt, DEFAULT_AGENT_PROMPT } from './prompts.js'
 import { CLI_SYSPROMPT_PREFIXES, getCLISyspromptPrefix } from './system.js'
 import { CLAUDE_CODE_GUIDE_AGENT } from '../tools/AgentTool/built-in/claudeCodeGuideAgent.js'