docs: 新增开发路线图与架构 / 数据流水可视化图

- docs/ROADMAP.md：M0-M5 里程碑与 Phase 1-5 开发计划（含验收口径与硬约束自查）
- docs/diagrams/qlib-architecture.html：系统架构图（Web→API→Service→Domain→存储，Qlib Adapter 与数据源支线）
- docs/diagrams/qlib-dataflow.html：数据流水图（Tushare/Sina→落地→特征→研究→实验→消费）
- 均按 archify showcase 校验交付，1440×900 ~ 2048×1320（light/dark）无溢出

docs/diagrams/qlib-architecture.json

@@ -0,0 +1,65 @@
+{
+  "schema_version": 1,
+  "diagram_type": "architecture",
+  "meta": {
+    "title": "A股量化研究平台 · 系统架构",
+    "quality_profile": "showcase",
+    "viewBox": [1360, 660],
+    "views": [
+      { "id": "main-chain", "label": "主研究链", "focus": ["web-ui", "api", "services", "domain", "sqlite", "parquet"], "note": "从 Web UI 经 Research Specification 到持久化的业务主链。" },
+      { "id": "quant-path", "label": "量化引擎链路", "focus": ["services", "qlib-adapter", "qlib"], "note": "Qlib 只经 Adapter 被调用，业务层不直接 import qlib。" },
+      { "id": "source-path", "label": "数据源链路", "focus": ["tushare", "sina", "services"], "note": "Tushare 首选，新浪仅作缺失兜底与交叉验证。" }
+    ]
+  },
+  "components": [
+    { "id": "web-ui", "type": "frontend", "label": "Web UI", "sublabel": "Next.js · ECharts", "pos": [460, 16], "size": [320, 64] },
+    { "id": "api", "type": "backend", "label": "FastAPI API", "sublabel": "Pydantic DTO · REST / SSE", "pos": [460, 118], "size": [320, 64] },
+    { "id": "services", "type": "backend", "label": "Application Services", "sublabel": "数据 / 因子 / 策略 / 回测 / 实验", "pos": [400, 232], "size": [440, 108] },
+    { "id": "domain", "type": "backend", "label": "Domain · Repository", "sublabel": "实体 + Protocol（禁 SQL）", "pos": [460, 392], "size": [320, 80] },
+    { "id": "agent", "type": "backend", "label": "Agent Service", "sublabel": "AI 助手 · 受控 Tool", "pos": [30, 40], "size": [240, 62] },
+    { "id": "tushare", "type": "external", "label": "Tushare", "sublabel": "日线 / 财务 / 日历（首选）", "pos": [30, 232], "size": [240, 64] },
+    { "id": "sina", "type": "external", "label": "新浪财经", "sublabel": "兜底 / 交叉验证（备用）", "pos": [30, 390], "size": [240, 64] },
+    { "id": "qlib-adapter", "type": "backend", "label": "Quant · Qlib Adapter", "sublabel": "Dataset / 训练 / 回测封装", "pos": [1010, 232], "size": [290, 72] },
+    { "id": "qlib", "type": "external", "label": "Qlib 引擎", "sublabel": "LightGBM / 回测（不改源码）", "pos": [1010, 400], "size": [290, 68] },
+    { "id": "sqlite", "type": "database", "label": "SQLite", "sublabel": "元数据 / 实验 / Job", "pos": [330, 532], "size": [240, 64] },
+    { "id": "parquet", "type": "database", "label": "Parquet · Qlib Dataset", "sublabel": "行情 / 财务 / 特征", "pos": [750, 532], "size": [260, 64] }
+  ],
+  "connections": [
+    { "id": "req-rest", "from": "web-ui", "to": "api", "label": "REST / SSE", "labelAt": [620, 94] },
+    { "id": "to-spec", "from": "api", "to": "services", "label": "Research Specification", "variant": "emphasis", "labelAt": [620, 196] },
+    { "id": "to-domain", "from": "services", "to": "domain", "label": "Repository Protocol · 编排", "labelAt": [620, 366] },
+    { "id": "domain-sqlite", "from": "domain", "to": "sqlite", "label": "元数据 / 实验", "fromSide": "bottom", "toSide": "top" },
+    { "id": "domain-parquet", "from": "domain", "to": "parquet", "label": "时序 / 特征", "fromSide": "bottom", "toSide": "top" },
+    { "id": "fetch-tushare", "from": "tushare", "to": "services", "label": "行情 / 财务（首选）", "variant": "emphasis", "labelAt": [250, 318] },
+    { "id": "fallback-sina", "from": "sina", "to": "services", "label": "兜底（缺失）", "variant": "dashed" },
+    { "id": "to-adapter", "from": "services", "to": "qlib-adapter", "label": "因子 / 回测 Job", "variant": "emphasis" },
+    { "id": "adapter-qlib", "from": "qlib-adapter", "to": "qlib", "label": "Dataset / 训练 / 回测", "fromSide": "bottom", "toSide": "top", "labelAt": [1155, 318] },
+    { "id": "agent-tools", "from": "agent", "to": "services", "label": "受控 Tool（Phase 5）", "variant": "dashed" }
+  ],
+  "cards": [
+    {
+      "dot": "emerald",
+      "title": "主研究链",
+      "items": [
+        "Web UI → API（Research Specification DTO）→ 服务编排 → Repository → SQLite / Parquet",
+        "Qlib 仅经 Qlib Adapter 调用，业务层不直接 import qlib"
+      ]
+    },
+    {
+      "dot": "violet",
+      "title": "数据源与边界纪律",
+      "items": [
+        "Tushare 首选，新浪兜底须经统一 Provider 并记录来源，禁止静默切换",
+        "业务层禁 SQL / Session 直连；Agent 仅走受控 Tool（Phase 5）"
+      ]
+    },
+    {
+      "dot": "amber",
+      "title": "异步与可复现",
+      "items": [
+        "因子 / 训练 / 回测为异步 Job：queued → running → success / failed / cancelled",
+        "所有研究落 Experiment，含数据与代码版本，可一键复跑"
+      ]
+    }
+  ]
+}