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_rvw_configs/migration.sql

@@ -0,0 +1,28 @@
+-- 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;