refactor(board-view): reorganize into modular folder structure

- Extract board-view into organized subfolders following new pattern:
  - components/: kanban-card, kanban-column
  - dialogs/: all dialog and modal components (8 files)
  - hooks/: all board-specific hooks (10 files)
  - shared/: reusable components between dialogs (model-selector, etc.)
- Rename all files to kebab-case convention
- Add barrel exports (index.ts) for clean imports
- Add docs/folder-pattern.md documenting the folder structure
- Reduce board-view.tsx from ~3600 lines to ~490 lines

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/app/src/components/views/profiles-view/constants.ts

@@ -46,3 +46,4 @@ export const THINKING_LEVELS: { id: ThinkingLevel; label: string }[] = [
   { id: "ultrathink", label: "Ultrathink" },
 ];
 
+

apps/app/src/components/views/profiles-view/utils.ts

@@ -5,3 +5,4 @@ export function getProviderFromModel(model: AgentModel): ModelProvider {
   return "claude";
 }
 
+