diff --git a/apps/api/src/db/0044_achievement_more_tiers.sql b/apps/api/src/db/0044_achievement_more_tiers.sql
new file mode 100644
index 0000000..ff0010b
--- /dev/null
+++ b/apps/api/src/db/0044_achievement_more_tiers.sql
@@ -0,0 +1,184 @@
+-- 成就惠及更多学生（2026-11-03）。已经拿到的一个不收回。
+--
+-- 这学期 375 个交过题的学生，成就数中位数 5 个、三分之一只有 0–2 个。三件事：
+--
+-- 1. 比赛里的提交也算成就（判题结算同步改了，见 services/achievements.ts 的 solvedCounts）。
+--    这里的比赛其实是单班测验，2612 班整个班都在比赛里做题，人均做对 17 道却一个成就也没有；
+--    「参加过几场比赛」以前判题时也不更新，只在后台重扫时刷新，所以连「初入赛场」都没拿到。
+-- 2. 几条线补上低一档（10 道和 50 道之间、一次就对 1 次和 20 次之间……），外加一条新线
+--    「挑战成功」。括号里是这学期学生已经达到的比例。
+-- 3. 档多了，「奖杯收藏家」从 15 个提到 20 个，不然人人都有。
+--
+-- 然后从提交记录把含比赛的指标重数一遍，按新配置给所有达标的人补发（backfilled，不显示日期）。
+-- 编译错误次数和按天的连续不重数：前者上线前的历史本来就没有，后者已经下架。
+
+INSERT INTO "achievement" ("name", "description", "icon", "rarity", "hidden", "metric", "operator", "threshold", "visible", "unlock_count", "order", "create_time") VALUES
+  ('稳扎稳打', '通过 20 道题目', 'noto:orange-book', 'bronze', false, 'accepted_count', 'gte', 20, true, 0, 2, now()),          -- 44%
+  ('初露锋芒', '通过 1 道中等难度题目', 'noto:sunrise-over-mountains', 'bronze', false, 'mid_ac_count', 'gte', 1, true, 0, 6, now()), -- 21%
+  ('迎难而上', '挑战成功 1 次', 'noto:puzzle-piece', 'bronze', false, 'challenge_count', 'gte', 1, true, 0, 10, now()),      -- 60%
+  ('精益求精', '挑战成功 5 次', 'noto:gem-stone', 'silver', false, 'challenge_count', 'gte', 5, true, 0, 10, now()),         -- 12%
+  ('勤学苦练', '累计提交 30 次', 'noto:pencil', 'bronze', false, 'submission_count', 'gte', 30, true, 0, 11, now()),         -- 48%
+  ('渐成习惯', '累计 5 天有提交记录', 'noto:spiral-calendar', 'bronze', false, 'active_days', 'gte', 5, true, 0, 15, now()), -- 59%
+  ('手感火热', '累计 5 次首次提交即通过', 'noto:glowing-star', 'bronze', true, 'first_try_ac_count', 'gte', 5, true, 0, 25, now()), -- 67%
+  ('再试一次', '同一道题失败 3 次后终于通过', 'noto:counterclockwise-arrows-button', 'bronze', true, 'max_wa_before_ac', 'gte', 3, true, 0, 32, now()), -- 54%
+  ('一鼓作气', '一天之内通过 5 道题', 'noto:dashing-away', 'bronze', true, 'max_ac_in_one_day', 'gte', 5, true, 0, 34, now()); -- 57%
+--> statement-breakpoint
+UPDATE "achievement" SET "threshold" = 20, "description" = '解锁 20 个成就（不含白金）'
+WHERE "metric" = 'achievement_unlocked_count' AND "threshold" = 15;
+--> statement-breakpoint
+-- 交过题、还没有 user_stat 的人先建一行（2612 班大多是这样：比赛提交以前根本不进结算）
+INSERT INTO "user_stat" ("user_id", "metrics", "update_time")
+SELECT DISTINCT s."user_id", '{}'::jsonb, now()
+FROM "submission" s
+JOIN "user" u ON u."id" = s."user_id"
+ON CONFLICT ("user_id") DO NOTHING;
+--> statement-breakpoint
+-- 按判题结算的口径从提交记录重数（services/achievements.ts）：含比赛；在判的（6/7）不算，
+-- 它们判完时结算会自己加；做对 = ACCEPTED(0) / AST_CHECK_FAILED(10)；日历按东八区。
+-- 「新做对」= 这道题第一次做对的那条提交。
+UPDATE "user_stat" AS target
+SET "metrics" = target."metrics" || fresh.metrics, "update_time" = now()
+FROM (
+  WITH subs AS (
+    SELECT s."id", s."user_id", s."problem_id", s."contest_id", s."result", s."language", s."code", s."create_time",
+      (s."create_time" AT TIME ZONE 'Asia/Shanghai') AS local, p."difficulty",
+      s."result" IN (0, 10) AS ac,
+      -- 这道题在这条之前交过几次（同一时刻的不算「之前」，和结算里的 create_time < 一致）
+      rank() OVER (PARTITION BY s."user_id", s."problem_id" ORDER BY s."create_time") - 1 AS before
+    FROM "submission" s
+    JOIN "user" u ON u."id" = s."user_id"
+    JOIN "problem" p ON p."id" = s."problem_id"
+    WHERE s."result" NOT IN (6, 7)
+  ),
+  totals AS (
+    SELECT "user_id",
+      count(DISTINCT "problem_id") FILTER (WHERE ac)::int AS accepted,
+      count(DISTINCT "problem_id") FILTER (WHERE ac AND "difficulty" = 'Mid')::int AS mid,
+      count(DISTINCT "problem_id") FILTER (WHERE ac AND "difficulty" = 'High')::int AS hard,
+      count(*)::int AS submissions,
+      count(DISTINCT "contest_id")::int AS contests,
+      count(*) FILTER (WHERE extract(hour FROM local) < 5)::int AS midnight,
+      count(*) FILTER (WHERE extract(hour FROM local) >= 5 AND extract(hour FROM local) < 7)::int AS early,
+      jsonb_agg(DISTINCT "language") AS languages,
+      jsonb_agg(DISTINCT to_char(local, 'YYYY-MM-DD')) AS dates
+    FROM subs GROUP BY "user_id"
+  ),
+  first_try AS (
+    SELECT "user_id", count(*) FILTER (WHERE ac)::int AS n
+    FROM (SELECT DISTINCT ON ("user_id", "problem_id") "user_id", ac FROM subs ORDER BY "user_id", "problem_id", "create_time", "id") f
+    GROUP BY "user_id"
+  ),
+  code_lines AS (
+    SELECT "user_id", max((
+      SELECT count(*) FROM regexp_split_to_table("code", E'\n') AS line WHERE btrim(line, E' \t\r') <> ''
+    ))::int AS n
+    FROM subs WHERE ac GROUP BY "user_id"
+  ),
+  first_ac AS (
+    SELECT DISTINCT ON ("user_id", "problem_id") "user_id", "problem_id", local, before
+    FROM subs WHERE ac ORDER BY "user_id", "problem_id", "create_time", "id"
+  ),
+  wa_before AS (
+    SELECT "user_id", max(before)::int AS n FROM first_ac GROUP BY "user_id"
+  ),
+  per_day AS (
+    SELECT "user_id", jsonb_object_agg(day, n) AS days, max(n)::int AS best
+    FROM (SELECT "user_id", to_char(local, 'YYYY-MM-DD') AS day, count(*)::int AS n FROM first_ac GROUP BY 1, 2) d
+    GROUP BY "user_id"
+  ),
+  weeks AS (
+    SELECT DISTINCT "user_id", date_trunc('week', local)::date AS w FROM first_ac
+  ),
+  runs AS (
+    SELECT "user_id", count(*)::int AS len, max(w) AS last_w
+    FROM (SELECT "user_id", w, w - (row_number() OVER (PARTITION BY "user_id" ORDER BY w))::int * 7 AS g FROM weeks) i
+    GROUP BY "user_id", g
+  ),
+  streak AS (
+    SELECT "user_id", max(len) AS best, (array_agg(len ORDER BY last_w DESC))[1] AS current, max(last_w) AS last_w
+    FROM runs GROUP BY "user_id"
+  ),
+  challenges AS (
+    SELECT "user_id", count(*)::int AS n FROM "challenge_success" GROUP BY "user_id"
+  )
+  SELECT t."user_id",
+    jsonb_build_object(
+      'accepted_count', t.accepted,
+      'mid_ac_count', t.mid,
+      'hard_ac_count', t.hard,
+      'first_try_ac_count', coalesce(ft.n, 0),
+      'submission_count', t.submissions,
+      'contest_joined', t.contests,
+      'midnight_submissions', t.midnight,
+      'early_bird_submissions', t.early,
+      '_languages', t.languages,
+      'languages_used', jsonb_array_length(t.languages),
+      '_active_dates', t.dates,
+      'active_days', jsonb_array_length(t.dates),
+      'max_code_lines', coalesce(cl.n, 0),
+      'max_wa_before_ac', coalesce(wb.n, 0),
+      '_ac_per_day', coalesce(pd.days, '{}'::jsonb),
+      'max_ac_in_one_day', coalesce(pd.best, 0),
+      'challenge_count', coalesce(ch.n, 0)
+    ) || CASE WHEN st."user_id" IS NULL THEN '{}'::jsonb ELSE jsonb_build_object(
+      'max_ac_week_streak', st.best,
+      '_current_ac_week_streak', st.current,
+      '_last_ac_week', to_char(st.last_w, 'YYYY-MM-DD')
+    ) END AS metrics
+  FROM totals t
+  LEFT JOIN first_try ft ON ft."user_id" = t."user_id"
+  LEFT JOIN code_lines cl ON cl."user_id" = t."user_id"
+  LEFT JOIN wa_before wb ON wb."user_id" = t."user_id"
+  LEFT JOIN per_day pd ON pd."user_id" = t."user_id"
+  LEFT JOIN streak st ON st."user_id" = t."user_id"
+  LEFT JOIN challenges ch ON ch."user_id" = t."user_id"
+) fresh
+WHERE target."user_id" = fresh."user_id";
+--> statement-breakpoint
+-- 挑战成功了、却一条提交都没有的（不会有，保险）也给个数
+UPDATE "user_stat" AS target
+SET "metrics" = jsonb_set(target."metrics", '{challenge_count}', to_jsonb(c.n))
+FROM (SELECT "user_id", count(*)::int AS n FROM "challenge_success" GROUP BY "user_id") c
+WHERE target."user_id" = c."user_id" AND (target."metrics" -> 'challenge_count') IS DISTINCT FROM to_jsonb(c.n);
+--> statement-breakpoint
+-- 补发：上架的、非元成就，达标没发的都发（口径同 rescanAchievement：backfilled、待通知）
+INSERT INTO "user_achievement" ("user_id", "achievement_id", "unlock_time", "backfilled", "notified")
+SELECT st."user_id", a."id", now(), true, false
+FROM "user_stat" st
+JOIN "achievement" a ON a."visible" AND a."metric" <> 'achievement_unlocked_count'
+WHERE jsonb_typeof(st."metrics" -> a."metric") = 'number'
+  AND CASE WHEN a."operator" = 'gte' THEN (st."metrics" ->> a."metric")::numeric >= a."threshold"
+           ELSE (st."metrics" ->> a."metric")::numeric <= a."threshold" END
+ON CONFLICT ("user_id", "achievement_id") DO NOTHING;
+--> statement-breakpoint
+-- 已解锁数（上架的非白金）重数，口径同 refreshUnlockedCount
+UPDATE "user_stat" AS target
+SET "metrics" = jsonb_set(target."metrics", '{achievement_unlocked_count}', to_jsonb(fresh.value))
+FROM (
+  SELECT s."id", coalesce(c.value, 0) AS value
+  FROM "user_stat" s
+  LEFT JOIN (
+    SELECT ua."user_id", count(*)::int AS value
+    FROM "user_achievement" ua
+    JOIN "achievement" a ON a."id" = ua."achievement_id"
+    WHERE a."rarity" <> 'platinum' AND a."visible"
+    GROUP BY ua."user_id"
+  ) c ON c."user_id" = s."user_id"
+) fresh
+WHERE target."id" = fresh."id"
+  AND (target."metrics" -> 'achievement_unlocked_count') IS DISTINCT FROM to_jsonb(fresh.value);
+--> statement-breakpoint
+-- 第二轮：元成就（奖杯收藏家）
+INSERT INTO "user_achievement" ("user_id", "achievement_id", "unlock_time", "backfilled", "notified")
+SELECT st."user_id", a."id", now(), true, false
+FROM "user_stat" st
+JOIN "achievement" a ON a."visible" AND a."metric" = 'achievement_unlocked_count'
+WHERE jsonb_typeof(st."metrics" -> a."metric") = 'number'
+  AND CASE WHEN a."operator" = 'gte' THEN (st."metrics" ->> a."metric")::numeric >= a."threshold"
+           ELSE (st."metrics" ->> a."metric")::numeric <= a."threshold" END
+ON CONFLICT ("user_id", "achievement_id") DO NOTHING;
+--> statement-breakpoint
+UPDATE "achievement" AS a
+SET "unlock_count" = coalesce(c.n, 0)
+FROM (SELECT "achievement_id", count(*)::int AS n FROM "user_achievement" GROUP BY "achievement_id") c
+WHERE c."achievement_id" = a."id" AND a."unlock_count" IS DISTINCT FROM c.n;
diff --git a/apps/api/src/db/meta/0044_snapshot.json b/apps/api/src/db/meta/0044_snapshot.json
new file mode 100644
index 0000000..980cae6
--- /dev/null
+++ b/apps/api/src/db/meta/0044_snapshot.json
@@ -0,0 +1,4126 @@
+{
+  "id": "0424faff-c256-4975-9a47-b03b58ae65b5",
+  "prevId": "c390556d-93e6-42ea-b9bb-29b285da615d",
+  "version": "7",
+  "dialect": "postgresql",
+  "tables": {
+    "public.achievement": {
+      "name": "achievement",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "bigint",
+          "primaryKey": true,
+          "notNull": true,
+          "identity": {
+            "name": "achievement_id_seq",
+            "increment": "1",
+            "minValue": "1",
+            "maxValue": "9223372036854775807",
+            "startWith": "1",
+            "cache": "1",
+            "cycle": false,
+            "schema": "public",
+            "type": "byDefault"
+          }
+        },
+        "name": {
+          "name": "name",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "description": {
+          "name": "description",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "icon": {
+          "name": "icon",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "rarity": {
+          "name": "rarity",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "hidden": {
+          "name": "hidden",
+          "type": "boolean",
+          "primaryKey": false,
+          "notNull": true,
+          "default": false
+        },
+        "metric": {
+          "name": "metric",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "operator": {
+          "name": "operator",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "threshold": {
+          "name": "threshold",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "visible": {
+          "name": "visible",
+          "type": "boolean",
+          "primaryKey": false,
+          "notNull": true,
+          "default": true
+        },
+        "unlock_count": {
+          "name": "unlock_count",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "default": 0
+        },
+        "order": {
+          "name": "order",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "default": 0
+        },
+        "create_time": {
+          "name": "create_time",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {},
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.acm_contest_rank": {
+      "name": "acm_contest_rank",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "serial",
+          "primaryKey": true,
+          "notNull": true
+        },
+        "submission_number": {
+          "name": "submission_number",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "default": 0
+        },
+        "accepted_number": {
+          "name": "accepted_number",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "default": 0
+        },
+        "total_time": {
+          "name": "total_time",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "default": 0
+        },
+        "submission_info": {
+          "name": "submission_info",
+          "type": "jsonb",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "'{}'::jsonb"
+        },
+        "contest_id": {
+          "name": "contest_id",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "user_id": {
+          "name": "user_id",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true
+        }
+      },
+      "indexes": {
+        "acm_rank_contest_user_idx": {
+          "name": "acm_rank_contest_user_idx",
+          "columns": [
+            {
+              "expression": "contest_id",
+              "isExpression": false,
+              "asc": true,
+              "nulls": "last",
+              "opclass": "int4_ops"
+            },
+            {
+              "expression": "user_id",
+              "isExpression": false,
+              "asc": true,
+              "nulls": "last",
+              "opclass": "int4_ops"
+            }
+          ],
+          "isUnique": false,
+          "with": {},
+          "method": "btree",
+          "concurrently": false
+        },
+        "acm_rank_order_idx": {
+          "name": "acm_rank_order_idx",
+          "columns": [
+            {
+              "expression": "contest_id",
+              "isExpression": false,
+              "asc": true,
+              "nulls": "last",
+              "opclass": "int4_ops"
+            },
+            {
+              "expression": "accepted_number",
+              "isExpression": false,
+              "asc": true,
+              "nulls": "last",
+              "opclass": "int4_ops"
+            },
+            {
+              "expression": "total_time",
+              "isExpression": false,
+              "asc": true,
+              "nulls": "last",
+              "opclass": "int4_ops"
+            }
+          ],
+          "isUnique": false,
+          "with": {},
+          "method": "btree",
+          "concurrently": false
+        }
+      },
+      "foreignKeys": {
+        "acm_contest_rank_contest_id_21030ccd_fk_contest_id": {
+          "name": "acm_contest_rank_contest_id_21030ccd_fk_contest_id",
+          "tableFrom": "acm_contest_rank",
+          "columnsFrom": [
+            "contest_id"
+          ],
+          "tableTo": "contest",
+          "columnsTo": [
+            "id"
+          ],
+          "onUpdate": "no action",
+          "onDelete": "no action"
+        },
+        "acm_contest_rank_user_id_40391ab2_fk_user_id": {
+          "name": "acm_contest_rank_user_id_40391ab2_fk_user_id",
+          "tableFrom": "acm_contest_rank",
+          "columnsFrom": [
+            "user_id"
+          ],
+          "tableTo": "user",
+          "columnsTo": [
+            "id"
+          ],
+          "onUpdate": "no action",
+          "onDelete": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {
+        "unique_acm_rank_user_contest": {
+          "name": "unique_acm_rank_user_contest",
+          "columns": [
+            "contest_id",
+            "user_id"
+          ],
+          "nullsNotDistinct": false
+        }
+      },
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.ai_analysis": {
+      "name": "ai_analysis",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "bigint",
+          "primaryKey": true,
+          "notNull": true,
+          "identity": {
+            "name": "ai_analysis_id_seq",
+            "increment": "1",
+            "minValue": "1",
+            "maxValue": "9223372036854775807",
+            "startWith": "1",
+            "cache": "1",
+            "cycle": false,
+            "schema": "public",
+            "type": "byDefault"
+          }
+        },
+        "provider": {
+          "name": "provider",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "data": {
+          "name": "data",
+          "type": "jsonb",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "system_prompt": {
+          "name": "system_prompt",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "user_prompt": {
+          "name": "user_prompt",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "analysis": {
+          "name": "analysis",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "create_time": {
+          "name": "create_time",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "user_id": {
+          "name": "user_id",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "model": {
+          "name": "model",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "is_pinned": {
+          "name": "is_pinned",
+          "type": "boolean",
+          "primaryKey": false,
+          "notNull": true
+        }
+      },
+      "indexes": {
+        "ai_analysis_user_id_3aa23011": {
+          "name": "ai_analysis_user_id_3aa23011",
+          "columns": [
+            {
+              "expression": "user_id",
+              "isExpression": false,
+              "asc": true,
+              "nulls": "last",
+              "opclass": "int4_ops"
+            }
+          ],
+          "isUnique": false,
+          "with": {},
+          "method": "btree",
+          "concurrently": false
+        }
+      },
+      "foreignKeys": {
+        "ai_analysis_user_id_3aa23011_fk_user_id": {
+          "name": "ai_analysis_user_id_3aa23011_fk_user_id",
+          "tableFrom": "ai_analysis",
+          "columnsFrom": [
+            "user_id"
+          ],
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+            "cycle": false,
+            "schema": "public",
+            "type": "byDefault"
+          }
+        },
+        "unlock_time": {
+          "name": "unlock_time",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "backfilled": {
+          "name": "backfilled",
+          "type": "boolean",
+          "primaryKey": false,
+          "notNull": true,
+          "default": false
+        },
+        "notified": {
+          "name": "notified",
+          "type": "boolean",
+          "primaryKey": false,
+          "notNull": true,
+          "default": false
+        },
+        "achievement_id": {
+          "name": "achievement_id",
+          "type": "bigint",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "user_id": {
+          "name": "user_id",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true
+        }
+      },
+      "indexes": {
+        "user_achievement_achievement_id_29db600d": {
+          "name": "user_achievement_achievement_id_29db600d",
+          "columns": [
+            {
+              "expression": "achievement_id",
+              "isExpression": false,
+              "asc": true,
+              "nulls": "last",
+              "opclass": "int8_ops"
+            }
+          ],
+          "isUnique": false,
+          "with": {},
+          "method": "btree",
+          "concurrently": false
+        },
+        "user_achv_notified_idx": {
+          "name": "user_achv_notified_idx",
+          "columns": [
+            {
+              "expression": "user_id",
+              "isExpression": false,
+              "asc": true,
+              "nulls": "last",
+              "opclass": "int4_ops"
+            },
+            {
+              "expression": "notified",
+              "isExpression": false,
+              "asc": true,
+              "nulls": "last",
+              "opclass": "bool_ops"
+            }
+          ],
+          "isUnique": false,
+          "with": {},
+          "method": "btree",
+          "concurrently": false
+        },
+        "user_achv_time_idx": {
+          "name": "user_achv_time_idx",
+          "columns": [
+            {
+              "expression": "user_id",
+              "isExpression": false,
+              "asc": true,
+              "nulls": "last",
+              "opclass": "int4_ops"
+            },
+            {
+              "expression": "unlock_time",
+              "isExpression": false,
+              "asc": false,
+              "nulls": "first",
+              "opclass": "timestamptz_ops"
+            }
+          ],
+          "isUnique": false,
+          "with": {},
+          "method": "btree",
+          "concurrently": false
+        }
+      },
+      "foreignKeys": {
+        "user_achievement_achievement_id_29db600d_fk_achievement_id": {
+          "name": "user_achievement_achievement_id_29db600d_fk_achievement_id",
+          "tableFrom": "user_achievement",
+          "columnsFrom": [
+            "achievement_id"
+          ],
+          "tableTo": "achievement",
+          "columnsTo": [
+            "id"
+          ],
+          "onUpdate": "no action",
+          "onDelete": "cascade"
+        },
+        "user_achievement_user_id_b8ec7d6a_fk_user_id": {
+          "name": "user_achievement_user_id_b8ec7d6a_fk_user_id",
+          "tableFrom": "user_achievement",
+          "columnsFrom": [
+            "user_id"
+          ],
+          "tableTo": "user",
+          "columnsTo": [
+            "id"
+          ],
+          "onUpdate": "no action",
+          "onDelete": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {
+        "unique_user_achievement": {
+          "name": "unique_user_achievement",
+          "columns": [
+            "achievement_id",
+            "user_id"
+          ],
+          "nullsNotDistinct": false
+        }
+      },
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.user_badge": {
+      "name": "user_badge",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "bigint",
+          "primaryKey": true,
+          "notNull": true,
+          "identity": {
+            "name": "user_badge_id_seq",
+            "increment": "1",
+            "minValue": "1",
+            "maxValue": "9223372036854775807",
+            "startWith": "1",
+            "cache": "1",
+            "cycle": false,
+            "schema": "public",
+            "type": "byDefault"
+          }
+        },
+        "earned_time": {
+          "name": "earned_time",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "badge_id": {
+          "name": "badge_id",
+          "type": "bigint",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "user_id": {
+          "name": "user_id",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true
+        }
+      },
+      "indexes": {
+        "user_badge_badge_id_92a983e9": {
+          "name": "user_badge_badge_id_92a983e9",
+          "columns": [
+            {
+              "expression": "badge_id",
+              "isExpression": false,
+              "asc": true,
+              "nulls": "last",
+              "opclass": "int8_ops"
+            }
+          ],
+          "isUnique": false,
+          "with": {},
+          "method": "btree",
+          "concurrently": false
+        }
+      },
+      "foreignKeys": {
+        "user_badge_badge_id_92a983e9_fk_problemset_badge_id": {
+          "name": "user_badge_badge_id_92a983e9_fk_problemset_badge_id",
+          "tableFrom": "user_badge",
+          "columnsFrom": [
+            "badge_id"
+          ],
+          "tableTo": "problemset_badge",
+          "columnsTo": [
+            "id"
+          ],
+          "onUpdate": "no action",
+          "onDelete": "cascade"
+        },
+        "user_badge_user_id_a286d718_fk_user_id": {
+          "name": "user_badge_user_id_a286d718_fk_user_id",
+          "tableFrom": "user_badge",
+          "columnsFrom": [
+            "user_id"
+          ],
+          "tableTo": "user",
+          "columnsTo": [
+            "id"
+          ],
+          "onUpdate": "no action",
+          "onDelete": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {
+        "unique_user_badge": {
+          "name": "unique_user_badge",
+          "columns": [
+            "badge_id",
+            "user_id"
+          ],
+          "nullsNotDistinct": false
+        }
+      },
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.user_profile": {
+      "name": "user_profile",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "serial",
+          "primaryKey": true,
+          "notNull": true
+        },
+        "acm_problems_status": {
+          "name": "acm_problems_status",
+          "type": "jsonb",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "'{}'::jsonb"
+        },
+        "avatar": {
+          "name": "avatar",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "mood": {
+          "name": "mood",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "accepted_number": {
+          "name": "accepted_number",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "default": 0
+        },
+        "submission_number": {
+          "name": "submission_number",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "default": 0
+        },
+        "user_id": {
+          "name": "user_id",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "real_name": {
+          "name": "real_name",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {
+        "user_profile_user_id_8fdce8e2_fk_user_id": {
+          "name": "user_profile_user_id_8fdce8e2_fk_user_id",
+          "tableFrom": "user_profile",
+          "columnsFrom": [
+            "user_id"
+          ],
+          "tableTo": "user",
+          "columnsTo": [
+            "id"
+          ],
+          "onUpdate": "no action",
+          "onDelete": "cascade"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {
+        "user_profile_user_id_key": {
+          "name": "user_profile_user_id_key",
+          "columns": [
+            "user_id"
+          ],
+          "nullsNotDistinct": false
+        }
+      },
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.user_stat": {
+      "name": "user_stat",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "bigint",
+          "primaryKey": true,
+          "notNull": true,
+          "identity": {
+            "name": "user_stat_id_seq",
+            "increment": "1",
+            "minValue": "1",
+            "maxValue": "9223372036854775807",
+            "startWith": "1",
+            "cache": "1",
+            "cycle": false,
+            "schema": "public",
+            "type": "byDefault"
+          }
+        },
+        "metrics": {
+          "name": "metrics",
+          "type": "jsonb",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "'{}'::jsonb"
+        },
+        "update_time": {
+          "name": "update_time",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "user_id": {
+          "name": "user_id",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {
+        "user_stat_user_id_73337fc0_fk_user_id": {
+          "name": "user_stat_user_id_73337fc0_fk_user_id",
+          "tableFrom": "user_stat",
+          "columnsFrom": [
+            "user_id"
+          ],
+          "tableTo": "user",
+          "columnsTo": [
+            "id"
+          ],
+          "onUpdate": "no action",
+          "onDelete": "cascade"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {
+        "user_stat_user_id_key": {
+          "name": "user_stat_user_id_key",
+          "columns": [
+            "user_id"
+          ],
+          "nullsNotDistinct": false
+        }
+      },
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    }
+  },
+  "enums": {},
+  "schemas": {},
+  "views": {},
+  "sequences": {},
+  "roles": {},
+  "policies": {},
+  "_meta": {
+    "columns": {},
+    "schemas": {},
+    "tables": {}
+  }
+}
\ No newline at end of file
diff --git a/apps/api/src/db/meta/_journal.json b/apps/api/src/db/meta/_journal.json
index 32440cb..f44e3a8 100644
--- a/apps/api/src/db/meta/_journal.json
+++ b/apps/api/src/db/meta/_journal.json
@@ -309,6 +309,13 @@
       "when": 1793693911394,
       "tag": "0043_mascot_event",
       "breakpoints": true
+    },
+    {
+      "idx": 44,
+      "version": "7",
+      "when": 1793695621303,
+      "tag": "0044_achievement_more_tiers",
+      "breakpoints": true
     }
   ]
 }
\ No newline at end of file
diff --git a/apps/api/src/services/achievement-metrics.ts b/apps/api/src/services/achievement-metrics.ts
index 64345f7..1792360 100644
--- a/apps/api/src/services/achievement-metrics.ts
+++ b/apps/api/src/services/achievement-metrics.ts
@@ -17,22 +17,22 @@ export const ACHIEVEMENT_METRICS: AchievementMetric[] = [
   {
     key: 'accepted_count',
     name: '做对的题数',
-    helpText: '去重后通过的题目数量（不含比赛）',
+    helpText: '去重后通过的题目数量（含比赛题）',
   },
   {
     key: 'mid_ac_count',
     name: '做对的中等题',
-    helpText: '去重后通过的中等难度题目数（不含比赛）',
+    helpText: '去重后通过的中等难度题目数（含比赛题）',
   },
   {
     key: 'hard_ac_count',
     name: '做对的困难题',
-    helpText: '去重后通过的困难题目数（不含比赛）',
+    helpText: '去重后通过的困难题目数（含比赛题）',
   },
   {
     key: 'submission_count',
     name: '提交次数',
-    helpText: '提交次数（不含比赛）',
+    helpText: '提交次数（含比赛）',
   },
   { key: 'active_days', name: '有提交的天数', helpText: '有过提交的累计天数' },
   {
@@ -45,13 +45,13 @@ export const ACHIEVEMENT_METRICS: AchievementMetric[] = [
   {
     key: 'max_ac_week_streak',
     name: '连续有新做对的周数',
-    helpText: '连续几个自然周（周一起）每周都至少新通过一道题（不含比赛）',
+    helpText: '连续几个自然周（周一起）每周都至少新通过一道题（含比赛题）',
   },
   { key: 'languages_used', name: '用过几种语言', helpText: '用过多少种编程语言' },
   {
     key: 'contest_joined',
     name: '参加比赛',
-    helpText: '参加过的比赛数量（本指标是比赛维度，不受比赛提交不计入的限制）',
+    helpText: '交过题的比赛数量',
   },
   { key: 'badge_count', name: '专题奖章', helpText: '获得的专题奖章数量' },
   {
@@ -59,6 +59,11 @@ export const ACHIEVEMENT_METRICS: AchievementMetric[] = [
     name: '做完的专题',
     helpText: '完成的专题数量',
   },
+  {
+    key: 'challenge_count',
+    name: '挑战成功',
+    helpText: '做对之后的挑战，做到了几条（每道题的每条挑战算一次）',
+  },
   {
     key: 'first_try_ac_count',
     name: '一次就对的题',
@@ -92,7 +97,7 @@ export const ACHIEVEMENT_METRICS: AchievementMetric[] = [
   {
     key: 'max_code_lines',
     name: '最长的代码行数',
-    helpText: '做对的提交里最长的代码有多少行（空行不算，不含比赛）',
+    helpText: '做对的提交里最长的代码有多少行（空行不算，含比赛）',
   },
   {
     key: 'achievement_unlocked_count',
diff --git a/apps/api/src/services/achievements.ts b/apps/api/src/services/achievements.ts
index 0a2a1c2..2ba4bee 100644
--- a/apps/api/src/services/achievements.ts
+++ b/apps/api/src/services/achievements.ts
@@ -1,4 +1,4 @@
-import { and, count, countDistinct, eq, inArray, isNotNull, isNull, lt, ne, notInArray, sql } from 'drizzle-orm'
+import { and, count, countDistinct, eq, inArray, isNotNull, lt, ne, notInArray, sql } from 'drizzle-orm'
 
 import { db, schema, type DbOrTx } from '../db'
 import { publishAchievementNotification } from '../events'
@@ -82,12 +82,17 @@ const ACCEPTED_RESULTS = sql.join([sql`${JudgeStatus.ACCEPTED}`, sql`${JudgeStat
 
 /**
  * 「做对几道 / 中等几道 / 困难几道 / 一次就对几道」按定义从提交表现数，不再逐次 +1。
+ * 参加过几场比赛、挑战成功几次也在这里一起数。
  *
  * 原来是读一遍这道题之前的提交、判断「是不是第一次做对」再 +1，两处漏：同一个人同一道题
  * 两条提交挨着判完，两边都看见对方已经做对（都不加）或都还没做对（加两次）；重判一条
  * 做对的提交又会再加一次。2026-10 的库里 372 人的做对题数比实际多 1–4 道。
  * 现数是幂等的，怎么并发、怎么重判都是同一个答案。走 submission_public_metrics_idx，
  * 一个人的提交也就几百条。
+ *
+ * **比赛里的提交也算**（2026-11-03 起）：这里的比赛其实是单班测验，有的班整学期都在
+ * 比赛里做题，不算的话一个成就都拿不到。比赛题是单独的题目行，不会和题库里同一道题重复数。
+ * 个人主页 / 排名的做对题数（user_profile.accepted_number）仍然不含比赛，两边对不上是有意的。
  */
 async function solvedCounts(tx: DbOrTx, userId: number) {
   const [row] = await tx.execute<{
@@ -95,13 +100,15 @@ async function solvedCounts(tx: DbOrTx, userId: number) {
     mid: number
     hard: number
     first_try: number
+    contests: number
+    challenges: number
   }>(
     sql`
       with mine as (
-        select s.problem_id, s.result, s.create_time, s.id, p.difficulty
+        select s.problem_id, s.contest_id, s.result, s.create_time, s.id, p.difficulty
         from ${schema.submission} s
         join ${schema.problem} p on p.id = s.problem_id
-        where s.user_id = ${userId} and s.contest_id is null
+        where s.user_id = ${userId}
       )
       select
         count(distinct problem_id) filter (where result in (${ACCEPTED_RESULTS}))::int as accepted,
@@ -111,11 +118,13 @@ async function solvedCounts(tx: DbOrTx, userId: number) {
           select count(*)::int from (
             select distinct on (problem_id) result from mine order by problem_id, create_time, id
           ) first where result in (${ACCEPTED_RESULTS})
-        ) as first_try
+        ) as first_try,
+        count(distinct contest_id)::int as contests,
+        (select count(*)::int from ${schema.challengeSuccess} where user_id = ${userId}) as challenges
       from mine
     `,
   )
-  return row ?? { accepted: 0, mid: 0, hard: 0, first_try: 0 }
+  return row ?? { accepted: 0, mid: 0, hard: 0, first_try: 0, contests: 0, challenges: 0 }
 }
 
 /**
@@ -130,7 +139,7 @@ export async function updateAchievementsForSubmission(submissionId: string, coun
     .innerJoin(schema.problem, eq(schema.submission.problemId, schema.problem.id))
     .where(eq(schema.submission.id, submissionId))
     .limit(1)
-  if (!row || row.submission.contestId !== null) return []
+  if (!row) return []
 
   const rejudged = countedAs !== null
   const accepted = isAccepted(row.submission.result)
@@ -157,6 +166,8 @@ export async function updateAchievementsForSubmission(submissionId: string, coun
     value.mid_ac_count = solved.mid
     value.hard_ac_count = solved.hard
     value.first_try_ac_count = solved.first_try
+    value.contest_joined = solved.contests
+    value.challenge_count = solved.challenges
     if (!rejudged) value.submission_count = numberMetric(value, 'submission_count') + 1
     if (firstAc) {
       // 只数这条之前的：重判一条老提交时，它后面的提交不算「做对之前错的」
@@ -167,7 +178,6 @@ export async function updateAchievementsForSubmission(submissionId: string, coun
           and(
             eq(schema.submission.userId, row.submission.userId),
             eq(schema.submission.problemId, row.submission.problemId),
-            isNull(schema.submission.contestId),
             lt(schema.submission.createTime, row.submission.createTime),
           ),
         )
@@ -301,7 +311,7 @@ export async function rescanAchievement(achievementId: number) {
   const metric = findMetric(achievement.metric)
   if (!metric) return { scanned: 0, unlocked: 0 }
 
-  // contest_joined 不由判题结算维护，扫之前先把它刷新一遍，否则永远读到旧值（或没有值）
+  // contest_joined 判题结算从 2026-11-03 起才维护，那之后没再交过题的人还是旧值，扫之前刷新一遍
   if (achievement.metric === 'contest_joined') await refreshContestJoinedForAll()
   // max_ac_week_streak 是后加的指标，判题结算只从上线那天起累计，存量用户要从提交记录补算
   if (achievement.metric === 'max_ac_week_streak') await refreshAcWeekStreakForAll()
@@ -482,7 +492,7 @@ async function refreshContestJoinedForAll() {
  * `_last_ac_week` / `_current_ac_week_streak` 一起写回 user_stat（jsonb 浅合并，
  * 其余指标不动，写法同 refreshContestJoinedForAll）。
  *
- * 「新通过」= 这道题（不含比赛）第一次通过的那次，和判题结算里 firstAc 同一个口径；
+ * 「新通过」= 这道题（含比赛题）第一次通过的那次，和判题结算里 firstAc 同一个口径；
  * 周按东八区自然周（周一起），SQL 里用 localTime 取墙上时间再 date_trunc。
  */
 async function refreshAcWeekStreakForAll() {
@@ -495,7 +505,7 @@ async function refreshAcWeekStreakForAll() {
     // 只算还在的用户：库里有提交的 user_id 已经对不上任何用户（submission.user_id 上没有
     // 外键，是历史遗留），直接写 user_stat 会撞 user_stat 的外键，整次重算失败
     .innerJoin(schema.user, eq(schema.user.id, schema.submission.userId))
-    .where(and(isNull(schema.submission.contestId), inArray(schema.submission.result, [JudgeStatus.ACCEPTED, JudgeStatus.AST_CHECK_FAILED])))
+    .where(inArray(schema.submission.result, [JudgeStatus.ACCEPTED, JudgeStatus.AST_CHECK_FAILED]))
     .groupBy(schema.submission.userId, schema.submission.problemId)
     .as('first_accepted')
   const week = sql<string>`to_char(date_trunc('week', ${localTime(firstAccepted.firstAt)}), 'YYYY-MM-DD')`
diff --git a/apps/web/src/oj/achievement/series.ts b/apps/web/src/oj/achievement/series.ts
index 619b572..cd60ec9 100644
--- a/apps/web/src/oj/achievement/series.ts
+++ b/apps/web/src/oj/achievement/series.ts
@@ -34,6 +34,12 @@ const METRICS: Record<string, MetricInfo> = {
     unit: '道',
     remain: (r) => `再做对 ${r} 道困难题`,
   },
+  challenge_count: {
+    group: '做题',
+    label: '挑战成功',
+    unit: '次',
+    remain: (r) => `再挑战成功 ${r} 次`,
+  },
   max_ac_week_streak: {
     group: '坚持',
     label: '连着几周有做对',
diff --git a/packages/contract/src/problem.ts b/packages/contract/src/problem.ts
index 1ecad14..99cbeac 100644
--- a/packages/contract/src/problem.ts
+++ b/packages/contract/src/problem.ts
@@ -507,7 +507,7 @@ export const problemListSortSchema = z.enum(['', 'create_time', '-submission_num
  * 离哪个成就最近；没做对的只给一个数（「有 n 道差一点」），不列出来。
  */
 export const problemProgressSchema = z.object({
-  /** 做对的题数，和成就的「AC 题目数」同一个数（不含比赛），这样「再做对 n 道」加得上 */
+  /** 做对的题数，和成就的「AC 题目数」同一个数（含比赛题，2026-11-03 起），这样「再做对 n 道」加得上 */
   solved: z.number().int(),
   /** 本周（东八区周一起）新做对几道 */
   weekSolved: z.number().int(),