feat: M0-M2 骨架落地（服务端/前端/宿主/数据库/积分引擎）

- server: Go 单二进制骨架，embed 内嵌前端，配置/迁移/HTTP 路由
- store: system.db + event.db 两套迁移，业务表 + 种子数据
- domain: 积分引擎（并列三口径/计分通道/流水/排名/破纪录）+ 68 个测试
- web: Vite + Vue 三入口骨架 + shared 层（类型/API/WebSocket 客户端）
- console: Electron 宿主骨架（选屏/防熄屏/进程守护/托盘）

server/migrations/event/0002_teams_athletes.sql

@@ -0,0 +1,24 @@
+CREATE TABLE IF NOT EXISTS teams (
+    id         INTEGER PRIMARY KEY AUTOINCREMENT,
+    code       TEXT NOT NULL UNIQUE,
+    name       TEXT NOT NULL,
+    short_name TEXT,
+    logo_path  TEXT,
+    color      TEXT,
+    sort_order INTEGER NOT NULL DEFAULT 0,
+    active     INTEGER NOT NULL DEFAULT 1 CHECK (active IN (0, 1))
+);
+
+CREATE INDEX IF NOT EXISTS idx_teams_sort_order ON teams(sort_order, code);
+
+CREATE TABLE IF NOT EXISTS athletes (
+    id          INTEGER PRIMARY KEY AUTOINCREMENT,
+    name        TEXT NOT NULL,
+    gender      TEXT CHECK (gender IN ('男', '女')),
+    team_id     INTEGER REFERENCES teams(id),
+    employee_no TEXT,
+    active      INTEGER NOT NULL DEFAULT 1 CHECK (active IN (0, 1))
+);
+
+CREATE INDEX IF NOT EXISTS idx_athletes_team_id ON athletes(team_id);
+CREATE INDEX IF NOT EXISTS idx_athletes_name ON athletes(name);