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/0011_seed.sql

@@ -0,0 +1,45 @@
+-- 默认积分模板：个人 10/8/6/3/2/1，团体 15/10/8/4/2/1（见 02-积分与排名规则 第 2.1 节）。
+INSERT OR IGNORE INTO scoring_profiles (code, name, tie_mode, record_bonus_mode, award_ranks, last_place_zero)
+VALUES ('individual_top6', '个人项目前六名', 'skip', 'max', 6, 0),
+       ('team_top6', '团体项目前六名', 'skip', 'max', 6, 0);
+
+INSERT OR IGNORE INTO scoring_profile_rules (profile_id, rank, points)
+SELECT p.id, r.rank, r.points
+FROM scoring_profiles p
+JOIN (SELECT 1 AS rank, 10.0 AS points UNION ALL
+      SELECT 2, 8.0 UNION ALL
+      SELECT 3, 6.0 UNION ALL
+      SELECT 4, 3.0 UNION ALL
+      SELECT 5, 2.0 UNION ALL
+      SELECT 6, 1.0) r
+WHERE p.code = 'individual_top6';
+
+INSERT OR IGNORE INTO scoring_profile_rules (profile_id, rank, points)
+SELECT p.id, r.rank, r.points
+FROM scoring_profiles p
+JOIN (SELECT 1 AS rank, 15.0 AS points UNION ALL
+      SELECT 2, 10.0 UNION ALL
+      SELECT 3, 8.0 UNION ALL
+      SELECT 4, 4.0 UNION ALL
+      SELECT 5, 2.0 UNION ALL
+      SELECT 6, 1.0) r
+WHERE p.code = 'team_top6';
+
+-- 赛事级默认配置；键名沿用 04-数据模型 的 event.name / display.rotate_seconds 风格。
+INSERT OR IGNORE INTO settings (key, value) VALUES
+    ('event.name', '未命名赛事'),
+    ('event.subtitle', ''),
+    ('event.organizer', ''),
+    ('event.logo_path', ''),
+    ('display.theme_color', '#1E88E5'),
+    ('display.rotate_seconds', '15'),
+    ('standings.mode', 'points'),
+    ('standings.individual_to_team_weight', '1'),
+    ('standings.show_individual_medals', 'true'),
+    ('standings.medal_counts_team_events', 'true'),
+    ('scoring.default_profile', 'individual_top6'),
+    ('results.review_required', 'false'),
+    ('record_bonus.enabled', 'false'),
+    ('record_bonus.mode', 'max'),
+    ('manual_adjustment.enabled', 'false'),
+    ('manual_adjustment.reason_required', 'true');