feat(web): add workspace management UI (M2 #12)

- Create workspace listing page at /settings/workspaces
  - List all user workspaces with role badges
  - Create new workspace functionality
  - Display member count per workspace

- Create workspace detail page at /settings/workspaces/[id]
  - Workspace settings (name, ID, created date)
  - Member management with role editing
  - Invite member functionality
  - Delete workspace (owner only)

- Add workspace components:
  - WorkspaceCard: Display workspace info with role badge
  - WorkspaceSettings: Edit workspace settings and delete
  - MemberList: Display and manage workspace members
  - InviteMember: Send invitations with role selection

- Add WorkspaceMemberWithUser type to shared package
- Follow existing app patterns for styling and structure
- Use mock data (ready for API integration)

packages/shared/src/types/database.types.ts

@@ -9,8 +9,11 @@ import type {
   TaskPriority,
   ProjectStatus,
   WorkspaceMemberRole,
+  TeamMemberRole,
   ActivityAction,
   EntityType,
+  EntryStatus,
+  Visibility,
 } from "./enums";
 
 /**
@@ -44,6 +47,33 @@ export interface WorkspaceMember {
   joinedAt: Date;
 }
 
+/**
+ * Workspace member with populated user data
+ */
+export interface WorkspaceMemberWithUser extends WorkspaceMember {
+  user: User;
+}
+
+/**
+ * Team entity
+ */
+export interface Team extends BaseEntity {
+  workspaceId: string;
+  name: string;
+  description: string | null;
+  metadata: Record<string, unknown>;
+}
+
+/**
+ * Team member entity (join table)
+ */
+export interface TeamMember {
+  teamId: string;
+  userId: string;
+  role: TeamMemberRole;
+  joinedAt: Date;
+}
+
 /**
  * Task entity
  */
@@ -120,3 +150,36 @@ export interface MemoryEmbedding extends BaseEntity {
   entityId: string | null;
   metadata: Record<string, unknown>;
 }
+
+/**
+ * Knowledge tag entity
+ */
+export interface KnowledgeTag extends BaseEntity {
+  workspaceId: string;
+  name: string;
+  slug: string;
+  color: string | null;
+}
+
+/**
+ * Knowledge entry entity
+ */
+export interface KnowledgeEntry extends BaseEntity {
+  workspaceId: string;
+  slug: string;
+  title: string;
+  content: string;
+  contentHtml: string | null;
+  summary: string | null;
+  status: EntryStatus;
+  visibility: Visibility;
+  createdBy: string;
+  updatedBy: string;
+}
+
+/**
+ * Knowledge entry with tags relation
+ */
+export interface KnowledgeEntryWithTags extends KnowledgeEntry {
+  tags: KnowledgeTag[];
+}

packages/shared/src/types/enums.ts

@@ -48,3 +48,15 @@ export enum EntityType {
   WORKSPACE = "WORKSPACE",
   USER = "USER",
 }
+
+export enum EntryStatus {
+  DRAFT = "DRAFT",
+  PUBLISHED = "PUBLISHED",
+  ARCHIVED = "ARCHIVED",
+}
+
+export enum Visibility {
+  PRIVATE = "PRIVATE",
+  WORKSPACE = "WORKSPACE",
+  PUBLIC = "PUBLIC",
+}