refactor(settings): move types.ts to shared folder

- Move types.ts to shared/types.ts
- Update all section files to import from ../shared/types
- Update theme-options.ts to import from ../../shared/types
- All TypeScript diagnostics passing
- Completes settings-view folder restructuring

Final structure:
- api-keys/ (with hooks/, config/)
- appearance/ (with config/)
- cli-status/ (claude, codex)
- feature-defaults/
- keyboard-shortcuts/
- kanban-display/
- danger-zone/
- shared/ (types.ts)

app/src/components/views/settings-view/kanban-display/kanban-display-section.tsx

@@ -1,7 +1,7 @@
 import { Button } from "@/components/ui/button";
 import { Label } from "@/components/ui/label";
 import { LayoutGrid, Minimize2, Square, Maximize2 } from "lucide-react";
-import type { KanbanDetailLevel } from "../types";
+import type { KanbanDetailLevel } from "../shared/types";
 
 interface KanbanDisplaySectionProps {
   detailLevel: KanbanDetailLevel;