feat: Add Kits + FurnaceSplitter plugin config modules

DB migrations 016 (kits_configs) and 019 (furnacesplitter_configs) applied.
Backend: NestJS modules with CRUD, apply-to-server, import-from-server.
Frontend: Pinia stores, Vue views with config editor, router + nav wiring.
Kits view: 3-tab editor (list/editor/settings), kit items with shortname/amount/skinId/container.
FurnaceSplitter view: per-furnace toggles, split count, fuel multiplier settings.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

backend-nest/src/modules/kits/kits.service.ts

@@ -0,0 +1,180 @@
+import { Injectable, Logger, NotFoundException, HttpException, HttpStatus } from '@nestjs/common';
+import { InjectRepository } from '@nestjs/typeorm';
+import { Repository } from 'typeorm';
+import { KitsConfig } from '../../entities/kits-config.entity';
+import { NatsService } from '../../services/nats.service';
+import { CreateKitsConfigDto } from './dto/create-kits-config.dto';
+import { UpdateKitsConfigDto } from './dto/update-kits-config.dto';
+
+@Injectable()
+export class KitsService {
+  private readonly logger = new Logger(KitsService.name);
+
+  constructor(
+    @InjectRepository(KitsConfig)
+    private readonly kitsRepo: Repository<KitsConfig>,
+    private readonly natsService: NatsService,
+  ) {}
+
+  /** List configs for a license (summaries — no JSONB) */
+  async getConfigs(licenseId: string) {
+    const configs = await this.kitsRepo.find({
+      where: { license_id: licenseId },
+      select: ['id', 'config_name', 'description', 'is_active', 'created_at', 'updated_at'],
+      order: { created_at: 'DESC' },
+    });
+    return { configs };
+  }
+
+  /** Get full config with JSONB data */
+  async getConfig(licenseId: string, configId: string) {
+    const config = await this.kitsRepo.findOne({
+      where: { id: configId, license_id: licenseId },
+    });
+    if (!config) throw new NotFoundException('Kits config not found');
+    return { config };
+  }
+
+  /** Create a new config */
+  async createConfig(licenseId: string, dto: CreateKitsConfigDto) {
+    const config = this.kitsRepo.create({
+      license_id: licenseId,
+      config_name: dto.config_name,
+      description: dto.description || null,
+      config_data: dto.config_data || {},
+    });
+    const saved = await this.kitsRepo.save(config);
+    return { config: saved };
+  }
+
+  /** Update an existing config */
+  async updateConfig(licenseId: string, configId: string, dto: UpdateKitsConfigDto) {
+    const config = await this.kitsRepo.findOne({
+      where: { id: configId, license_id: licenseId },
+    });
+    if (!config) throw new NotFoundException('Kits config not found');
+
+    if (dto.config_name !== undefined) config.config_name = dto.config_name;
+    if (dto.description !== undefined) config.description = dto.description;
+    if (dto.config_data !== undefined) config.config_data = dto.config_data;
+    if (dto.is_active !== undefined) config.is_active = dto.is_active;
+    config.updated_at = new Date();
+
+    const saved = await this.kitsRepo.save(config);
+    return { config: saved };
+  }
+
+  /** Delete a config */
+  async deleteConfig(licenseId: string, configId: string) {
+    const result = await this.kitsRepo.delete({ id: configId, license_id: licenseId });
+    if (result.affected === 0) throw new NotFoundException('Kits config not found');
+    return { deleted: true };
+  }
+
+  /** Deploy config to game server via NATS */
+  async applyToServer(licenseId: string, configId: string) {
+    const config = await this.kitsRepo.findOne({
+      where: { id: configId, license_id: licenseId },
+    });
+    if (!config) throw new NotFoundException('Kits config not found');
+
+    const jsonString = JSON.stringify(config.config_data, null, 2);
+
+    try {
+      // Write Kits.json via file manager NATS
+      await this.natsService.request(
+        `corrosion.${licenseId}.files.cmd`,
+        {
+          func: 'fm_save',
+          path: 'server://oxide/config/Kits.json',
+          content: jsonString,
+        },
+        30000,
+      );
+
+      // Reload Kits plugin via RCON
+      await this.natsService.publish(
+        `corrosion.${licenseId}.cmd.server`,
+        {
+          action: 'command',
+          command: 'oxide.reload Kits',
+          timestamp: new Date().toISOString(),
+        },
+      );
+
+      // Mark this config as active, deactivate others
+      await this.kitsRepo.update({ license_id: licenseId }, { is_active: false });
+      await this.kitsRepo.update(
+        { id: configId, license_id: licenseId },
+        { is_active: true, updated_at: new Date() },
+      );
+
+      return {
+        success: true,
+        message: `Config "${config.config_name}" deployed to server`,
+        config_name: config.config_name,
+      };
+    } catch (error) {
+      this.logger.error(`Failed to deploy kits config: ${(error as Error).message}`);
+      throw new HttpException(
+        'Failed to deploy kits config — agent may be offline',
+        HttpStatus.SERVICE_UNAVAILABLE,
+      );
+    }
+  }
+
+  /** Import Kits.json from game server via NATS */
+  async importFromServer(licenseId: string, configName: string, description?: string) {
+    try {
+      // Read Kits.json from server via file manager NATS
+      const response = await this.natsService.request(
+        `corrosion.${licenseId}.files.cmd`,
+        {
+          func: 'fm_preview',
+          path: 'server://oxide/config/Kits.json',
+        },
+        30000,
+      );
+
+      if (!response) {
+        throw new HttpException(
+          'No response from agent — it may be offline',
+          HttpStatus.SERVICE_UNAVAILABLE,
+        );
+      }
+
+      // Parse the response content as JSON
+      const responseData = response as Record<string, any>;
+      let configData: Record<string, any>;
+
+      if (typeof responseData.content === 'string') {
+        configData = JSON.parse(responseData.content);
+      } else if (typeof responseData.content === 'object') {
+        configData = responseData.content;
+      } else {
+        throw new HttpException(
+          'Unexpected response format from agent',
+          HttpStatus.BAD_GATEWAY,
+        );
+      }
+
+      // Create new kits config row
+      const config = this.kitsRepo.create({
+        license_id: licenseId,
+        config_name: configName,
+        description: description || 'Imported from server',
+        config_data: configData,
+      });
+      const saved = await this.kitsRepo.save(config);
+
+      return { config: saved };
+    } catch (error) {
+      if (error instanceof HttpException) throw error;
+      this.logger.error(`Failed to import kits config from server: ${(error as Error).message}`);
+      throw new HttpException(
+        'Failed to import kits config — agent may be offline',
+        HttpStatus.SERVICE_UNAVAILABLE,
+      );
+    }
+  }
+}