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/core/resources/excalidraw/library-loader.md

@@ -0,0 +1,50 @@
+# External Library Loader
+
+**Status:** Placeholder for future implementation
+
+## Purpose
+
+Load external .excalidrawlib files from <https://libraries.excalidraw.com> or custom sources.
+
+## Planned Capabilities
+
+- Load libraries by URL
+- Load libraries from local files
+- Merge multiple libraries
+- Filter library components
+- Cache loaded libraries
+
+## API Reference
+
+Will document how to use:
+
+- `importLibrary(url)` - Load library from URL
+- `loadSceneOrLibraryFromBlob()` - Load from file
+- `mergeLibraryItems()` - Combine libraries
+
+## Usage Example
+
+```yaml
+# Future workflow.yaml structure
+libraries:
+  - url: 'https://libraries.excalidraw.com/libraries/...'
+    filter: ['aws', 'cloud']
+  - path: '{project-root}/_data/custom-library.excalidrawlib'
+```
+
+## Implementation Notes
+
+This will be developed when agents need to leverage the extensive library ecosystem available at <https://libraries.excalidraw.com>.
+
+Hundreds of pre-built component libraries exist for:
+
+- AWS/Cloud icons
+- UI/UX components
+- Business diagrams
+- Mind map shapes
+- Floor plans
+- And much more...
+
+## User Configuration
+
+Future: Users will be able to configure favorite libraries in their BMAD config for automatic loading.