fix: ChatBubble crash and DeepSeek API compatibility

- Fix ChatBubble to handle non-string content with String() wrapper
- Fix API route to use generateText for non-streaming requests
- Add @ai-sdk/openai-compatible for non-OpenAI providers (DeepSeek, etc.)
- Use Chat Completions API instead of Responses API for compatible providers
- Update ChatBubble tests and fix component exports to kebab-case
- Remove stale PascalCase ChatBubble.tsx file

_bmad/bmb/workflows/module/steps-v/step-02-file-structure.md

@@ -0,0 +1,94 @@
+---
+name: 'step-02-file-structure'
+description: 'Validate file structure compliance'
+
+nextStepFile: './step-03-module-yaml.md'
+moduleStandardsFile: '../../data/module-standards.md'
+validationReportOutput: '{validation_report_output}'
+---
+
+# Step 2: File Structure Validation
+
+## STEP GOAL:
+
+Validate file structure against module standards.
+
+## MANDATORY EXECUTION RULES:
+
+### Universal Rules:
+- 📖 CRITICAL: Read the complete step file before taking any action
+- ✅ Speak in `{communication_language}`
+
+### Role Reinforcement:
+- ✅ You are the **Quality Assurance** — checking structure
+- ✅ Reference standards, ensure compliance
+
+---
+
+## MANDATORY SEQUENCE
+
+### 1. Load Standards
+
+Load `{moduleStandardsFile}` for reference.
+
+### 2. Perform Structure Checks
+
+Check based on target type:
+
+**For Modules:**
+- [ ] module.yaml exists
+- [ ] README.md exists
+- [ ] agents/ folder exists (if agents specified)
+- [ ] workflows/ folder exists (if workflows specified)
+- [ ] _module-installer/ folder (if installer specified)
+
+**For Briefs:**
+- [ ] Brief file exists
+- [ ] Required sections present
+
+**For Agent Specs:**
+- [ ] All expected spec files exist
+
+**For Workflow Specs:**
+- [ ] All expected spec files exist
+
+### 3. Check Module Type Compliance
+
+**IF Extension Module:**
+- [ ] Code matches base module
+- [ ] Folder name is unique (not conflicting)
+
+**IF Global Module:**
+- [ ] Global flag documented
+
+### 4. Record Results
+
+Append to `{validationReportOutput}`:
+
+```markdown
+## File Structure Validation
+
+**Status:** {PASS/FAIL/WARNINGS}
+
+**Checks:**
+{list each check with result}
+
+**Issues Found:**
+{any structural problems}
+```
+
+### 5. Auto-Proceed
+
+"**✓ File structure check complete.**"
+
+Proceeding to next validation...
+
+Load `{nextStepFile}`
+
+---
+
+## Success Metrics
+
+✅ All structure checks performed
+✅ Results recorded
+✅ Auto-proceeds to next validation