Implement OAuth client and token management with settings updates (#464)

src/db/entities/OAuthToken.ts

@@ -0,0 +1,51 @@
+import {
+  Entity,
+  Column,
+  PrimaryGeneratedColumn,
+  CreateDateColumn,
+  UpdateDateColumn,
+  Index,
+} from 'typeorm';
+
+/**
+ * OAuth Token entity for database storage
+ * Represents OAuth tokens issued by MCPHub's authorization server
+ */
+@Entity({ name: 'oauth_tokens' })
+export class OAuthToken {
+  @PrimaryGeneratedColumn('uuid')
+  id: string;
+
+  @Index()
+  @Column({ name: 'access_token', type: 'varchar', length: 512, unique: true })
+  accessToken: string;
+
+  @Column({ name: 'access_token_expires_at', type: 'timestamp' })
+  accessTokenExpiresAt: Date;
+
+  @Index()
+  @Column({ name: 'refresh_token', type: 'varchar', length: 512, nullable: true, unique: true })
+  refreshToken?: string;
+
+  @Column({ name: 'refresh_token_expires_at', type: 'timestamp', nullable: true })
+  refreshTokenExpiresAt?: Date;
+
+  @Column({ type: 'varchar', length: 512, nullable: true })
+  scope?: string;
+
+  @Index()
+  @Column({ name: 'client_id', type: 'varchar', length: 255 })
+  clientId: string;
+
+  @Index()
+  @Column({ type: 'varchar', length: 255 })
+  username: string;
+
+  @CreateDateColumn({ name: 'created_at', type: 'timestamp' })
+  createdAt: Date;
+
+  @UpdateDateColumn({ name: 'updated_at', type: 'timestamp' })
+  updatedAt: Date;
+}
+
+export default OAuthToken;