feat: redesign Clients admin — drag-and-drop, inline edit, tags

Schema:
- Client model: add tags String[] field
- Shared types + Zod schemas updated for tags

API:
- client.create/update: accept tags array
- client.delete: with safety checks (no projects, no children)
- client.batchUpdateSortOrder: batch reorder in transaction

UI (complete redesign of ClientsAdminClient):
- Drag-and-drop reordering via @dnd-kit (sortable)
- Inline editing: click name/sortOrder to edit in-place
- Tag pills: auto-colored by hash, add/remove inline
- Tag auto-suggest from existing tags across all clients
- Sticky "Add Client" input row at top
- Search/filter by name, code, or tag
- Delete with inline confirmation
- Optimistic reorder (instant UI update)
- Full dark theme support

Co-Authored-By: claude-flow <ruv@ruv.net>

packages/shared/src/schemas/client.schema.ts

@@ -5,6 +5,7 @@ export const CreateClientSchema = z.object({
   code: z.string().max(50).optional(),
   parentId: z.string().optional(),
   sortOrder: z.number().int().default(0),
+  tags: z.array(z.string().max(50)).optional(),
 });
 
 export const UpdateClientSchema = z.object({
@@ -13,6 +14,7 @@ export const UpdateClientSchema = z.object({
   sortOrder: z.number().int().optional(),
   isActive: z.boolean().optional(),
   parentId: z.string().nullable().optional(),
+  tags: z.array(z.string().max(50)).optional(),
 });
 
 export type CreateClientInput = z.infer<typeof CreateClientSchema>;

packages/shared/src/types/client.ts

@@ -5,6 +5,7 @@ export interface Client {
   parentId?: string | null;
   isActive: boolean;
   sortOrder: number;
+  tags: string[];
   createdAt: Date;
   updatedAt: Date;
 }