feat(rvw): deliver tenant portal v4 flow and config foundation

Implement RVW V4.0 tenant-aware backend/frontend flow with tenant routing, config APIs, and full portal UX updates. Sync system/RVW/deployment docs to capture verified upload-review-report workflow and next-step admin configuration work.

Made-with: Cursor

backend/prisma/migrations/20260314_add_tenant_id_to_review_tasks/migration.sql

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+-- RVW V4.0：给 review_tasks 表添加 tenant_id 字段（历史数据平滑迁移两步走）
+-- ⚠️ 部署前检查：执行前请确保 platform_schema.tenants 中已存在 code='yanjiu' 的默认租户
+-- Migration: 20260314_add_tenant_id_to_review_tasks
+
+-- ============================================================
+-- Step 1: 新增 tenant_id 列（先设为 NULL，允许历史数据缺失）
+-- ============================================================
+ALTER TABLE "rvw_schema"."review_tasks"
+    ADD COLUMN "tenant_id" TEXT;
+
+-- ============================================================
+-- Step 2: 将历史数据批量回填为默认主站租户
+-- 查询 code='yanjiu' 的租户ID，回填到所有历史记录
+-- 若无 yanjiu 租户，历史记录 tenant_id 保持 NULL（不影响运行）
+-- ============================================================
+UPDATE "rvw_schema"."review_tasks"
+SET "tenant_id" = (
+    SELECT "id" FROM "platform_schema"."tenants"
+    WHERE "code" = 'yanjiu'
+    LIMIT 1
+)
+WHERE "tenant_id" IS NULL;
+
+-- ============================================================
+-- 添加索引（无论是否有值，索引先建好供 V4.0 查询使用）
+-- ============================================================
+CREATE INDEX "idx_review_tasks_tenant_id"
+    ON "rvw_schema"."review_tasks"("tenant_id");
+
+-- ============================================================
+-- ⚠️ Step 3（可选，延后执行）：确认历史数据已全部回填后，再加 NOT NULL 约束
+-- 在生产环境手动执行以下 SQL，或在后续迁移中加入：
+--
+-- ALTER TABLE "rvw_schema"."review_tasks"
+--     ALTER COLUMN "tenant_id" SET NOT NULL;
+--
+-- ALTER TABLE "rvw_schema"."review_tasks"
+--     ADD CONSTRAINT "review_tasks_tenant_id_fkey"
+--     FOREIGN KEY ("tenant_id") REFERENCES "platform_schema"."tenants"("id");
+-- ============================================================

backend/prisma/migrations/20260314_add_tenant_rvw_configs/migration.sql

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+-- RVW V4.0：新增期刊租户级审稿配置表
+-- 每个期刊租户独立配置稿约规则、方法学/临床专家提示词、Handlebars 展示模板
+-- Migration: 20260314_add_tenant_rvw_configs
+
+CREATE TABLE "platform_schema"."tenant_rvw_configs" (
+    "id"                              TEXT NOT NULL,
+    "tenant_id"                       TEXT NOT NULL,
+    "editorial_rules"                 JSONB,
+    "methodology_expert_prompt"       TEXT,
+    "methodology_handlebars_template" TEXT,
+    "data_forensics_level"            TEXT NOT NULL DEFAULT 'L2',
+    "finer_weights"                   JSONB,
+    "clinical_expert_prompt"          TEXT,
+    "created_at"                      TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updated_at"                      TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+
+    CONSTRAINT "tenant_rvw_configs_pkey" PRIMARY KEY ("id")
+);
+
+-- Unique constraint: 每个租户只有一份配置
+CREATE UNIQUE INDEX "tenant_rvw_configs_tenant_id_key"
+    ON "platform_schema"."tenant_rvw_configs"("tenant_id");
+
+-- Foreign key to tenants（同 schema 内，可用标准外键）
+ALTER TABLE "platform_schema"."tenant_rvw_configs"
+    ADD CONSTRAINT "tenant_rvw_configs_tenant_id_fkey"
+    FOREIGN KEY ("tenant_id") REFERENCES "platform_schema"."tenants"("id")
+    ON DELETE CASCADE ON UPDATE CASCADE;