🤖 Add PR #38 status report with decision options

Complete status of the Storybook tool messages PR including:
- What works (local Storybook, all stories, no code issues)
- What's blocked (Chromatic visual regression)
- Investigation summary
- Decision options for moving forward

Ready for user decision on how to proceed.

Author: ammario

PR38_STATUS.md

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+# PR #38 Status Report
+
+## Current State
+- **Branch**: `storybook-tool-messages`
+- **PR**: https://github.com/coder/cmux/pull/38
+- **Status**: BLOCKED - Chromatic build failing
+
+## What Works ✅
+- ✅ Storybook builds locally
+- ✅ All 13 tool message stories render correctly
+- ✅ FileReadToolCall custom component working
+- ✅ TypeScript/ESLint passing
+- ✅ No code quality issues
+
+## What's Blocked ❌
+- ❌ Chromatic visual regression testing
+- Reason: `@emotion/styled` module resolution failure in Chromatic environment
+- Error: `TypeError: a is not a function` (styled is not a function)
+
+## Investigation Summary
+Spent significant time investigating the Chromatic build failure:
+- Converted 2 components to CSS modules (BashToolCall, FileReadToolCall)
+- Tried multiple Vite/Babel configurations
+- Added dedupe config for emotion packages
+- None resolved the Chromatic-specific issue
+
+## Root Cause
+The `@emotion/styled` default export becomes undefined in Chromatic's production build environment. This affects 25+ components across the codebase, not just the new Storybook stories.
+
+## Decision Needed
+See `CHROMATIC_ISSUE_SUMMARY.md` for detailed options analysis.
+
+**Quick options:**
+1. **Merge as-is** - Storybook works locally, accept Chromatic failure for now
+2. **Disable Chromatic** - Remove workflow temporarily, re-enable after fix
+3. **Continue conversion** - Convert all 25+ components to CSS modules (10-20 hours)
+4. **Open support ticket** - Contact Chromatic team for help
+
+## Recommendation
+**Option 1 or 2** - The Storybook feature is complete and working. The Chromatic issue is environmental and affects the entire codebase, not specific to this PR. It should be addressed separately.
+
+The stories provide value for local development even without Chromatic visual regression testing.