feat: rebuild CSP practice workflow, UX and automation

backend/migrations/001_init.sql

@@ -24,7 +24,11 @@ CREATE TABLE IF NOT EXISTS problems (
   title TEXT NOT NULL,
   statement_md TEXT NOT NULL,
   difficulty INTEGER NOT NULL DEFAULT 1,
-  source TEXT NOT NULL DEFAULT "",
+  source TEXT NOT NULL DEFAULT '',
+  statement_url TEXT NOT NULL DEFAULT '',
+  llm_profile_json TEXT NOT NULL DEFAULT '{}',
+  sample_input TEXT NOT NULL DEFAULT '',
+  sample_output TEXT NOT NULL DEFAULT '',
   created_at INTEGER NOT NULL
 );
 
@@ -39,22 +43,26 @@ CREATE TABLE IF NOT EXISTS submissions (
   id INTEGER PRIMARY KEY AUTOINCREMENT,
   user_id INTEGER NOT NULL,
   problem_id INTEGER NOT NULL,
+  contest_id INTEGER,
   language TEXT NOT NULL,
   code TEXT NOT NULL,
   status TEXT NOT NULL,
   score INTEGER NOT NULL DEFAULT 0,
   time_ms INTEGER NOT NULL DEFAULT 0,
   memory_kb INTEGER NOT NULL DEFAULT 0,
+  compile_log TEXT NOT NULL DEFAULT '',
+  runtime_log TEXT NOT NULL DEFAULT '',
   created_at INTEGER NOT NULL,
   FOREIGN KEY(user_id) REFERENCES users(id) ON DELETE CASCADE,
-  FOREIGN KEY(problem_id) REFERENCES problems(id) ON DELETE CASCADE
+  FOREIGN KEY(problem_id) REFERENCES problems(id) ON DELETE CASCADE,
+  FOREIGN KEY(contest_id) REFERENCES contests(id) ON DELETE SET NULL
 );
 
 CREATE TABLE IF NOT EXISTS wrong_book (
   user_id INTEGER NOT NULL,
   problem_id INTEGER NOT NULL,
   last_submission_id INTEGER,
-  note TEXT NOT NULL DEFAULT "",
+  note TEXT NOT NULL DEFAULT '',
   updated_at INTEGER NOT NULL,
   PRIMARY KEY(user_id, problem_id),
   FOREIGN KEY(user_id) REFERENCES users(id) ON DELETE CASCADE,
@@ -62,5 +70,133 @@ CREATE TABLE IF NOT EXISTS wrong_book (
   FOREIGN KEY(last_submission_id) REFERENCES submissions(id) ON DELETE SET NULL
 );
 
+CREATE TABLE IF NOT EXISTS contests (
+  id INTEGER PRIMARY KEY AUTOINCREMENT,
+  title TEXT NOT NULL,
+  starts_at INTEGER NOT NULL,
+  ends_at INTEGER NOT NULL,
+  rule_json TEXT NOT NULL DEFAULT '{}'
+);
+
+CREATE TABLE IF NOT EXISTS contest_problems (
+  contest_id INTEGER NOT NULL,
+  problem_id INTEGER NOT NULL,
+  idx INTEGER NOT NULL,
+  PRIMARY KEY(contest_id, problem_id),
+  FOREIGN KEY(contest_id) REFERENCES contests(id) ON DELETE CASCADE,
+  FOREIGN KEY(problem_id) REFERENCES problems(id) ON DELETE CASCADE
+);
+
+CREATE TABLE IF NOT EXISTS contest_registrations (
+  contest_id INTEGER NOT NULL,
+  user_id INTEGER NOT NULL,
+  registered_at INTEGER NOT NULL,
+  PRIMARY KEY(contest_id, user_id),
+  FOREIGN KEY(contest_id) REFERENCES contests(id) ON DELETE CASCADE,
+  FOREIGN KEY(user_id) REFERENCES users(id) ON DELETE CASCADE
+);
+
+CREATE TABLE IF NOT EXISTS kb_articles (
+  id INTEGER PRIMARY KEY AUTOINCREMENT,
+  slug TEXT NOT NULL UNIQUE,
+  title TEXT NOT NULL,
+  content_md TEXT NOT NULL,
+  created_at INTEGER NOT NULL
+);
+
+CREATE TABLE IF NOT EXISTS kb_article_links (
+  article_id INTEGER NOT NULL,
+  problem_id INTEGER NOT NULL,
+  PRIMARY KEY(article_id, problem_id),
+  FOREIGN KEY(article_id) REFERENCES kb_articles(id) ON DELETE CASCADE,
+  FOREIGN KEY(problem_id) REFERENCES problems(id) ON DELETE CASCADE
+);
+
+CREATE TABLE IF NOT EXISTS import_jobs (
+  id INTEGER PRIMARY KEY AUTOINCREMENT,
+  status TEXT NOT NULL,
+  trigger TEXT NOT NULL DEFAULT 'manual',
+  total_count INTEGER NOT NULL DEFAULT 0,
+  processed_count INTEGER NOT NULL DEFAULT 0,
+  success_count INTEGER NOT NULL DEFAULT 0,
+  failed_count INTEGER NOT NULL DEFAULT 0,
+  options_json TEXT NOT NULL DEFAULT '{}',
+  last_error TEXT NOT NULL DEFAULT '',
+  started_at INTEGER NOT NULL,
+  finished_at INTEGER,
+  updated_at INTEGER NOT NULL,
+  created_at INTEGER NOT NULL
+);
+
+CREATE TABLE IF NOT EXISTS import_job_items (
+  id INTEGER PRIMARY KEY AUTOINCREMENT,
+  job_id INTEGER NOT NULL,
+  source_path TEXT NOT NULL,
+  status TEXT NOT NULL DEFAULT 'queued',
+  title TEXT NOT NULL DEFAULT '',
+  difficulty INTEGER NOT NULL DEFAULT 0,
+  problem_id INTEGER,
+  error_text TEXT NOT NULL DEFAULT '',
+  started_at INTEGER,
+  finished_at INTEGER,
+  updated_at INTEGER NOT NULL,
+  created_at INTEGER NOT NULL,
+  FOREIGN KEY(job_id) REFERENCES import_jobs(id) ON DELETE CASCADE,
+  UNIQUE(job_id, source_path)
+);
+
+CREATE TABLE IF NOT EXISTS problem_drafts (
+  user_id INTEGER NOT NULL,
+  problem_id INTEGER NOT NULL,
+  language TEXT NOT NULL DEFAULT 'cpp',
+  code TEXT NOT NULL DEFAULT '',
+  stdin TEXT NOT NULL DEFAULT '',
+  updated_at INTEGER NOT NULL,
+  created_at INTEGER NOT NULL,
+  PRIMARY KEY(user_id, problem_id),
+  FOREIGN KEY(user_id) REFERENCES users(id) ON DELETE CASCADE,
+  FOREIGN KEY(problem_id) REFERENCES problems(id) ON DELETE CASCADE
+);
+
+CREATE TABLE IF NOT EXISTS problem_solution_jobs (
+  id INTEGER PRIMARY KEY AUTOINCREMENT,
+  problem_id INTEGER NOT NULL,
+  status TEXT NOT NULL DEFAULT 'queued',
+  progress INTEGER NOT NULL DEFAULT 0,
+  message TEXT NOT NULL DEFAULT '',
+  created_by INTEGER NOT NULL DEFAULT 0,
+  max_solutions INTEGER NOT NULL DEFAULT 3,
+  created_at INTEGER NOT NULL,
+  started_at INTEGER,
+  finished_at INTEGER,
+  updated_at INTEGER NOT NULL,
+  FOREIGN KEY(problem_id) REFERENCES problems(id) ON DELETE CASCADE
+);
+
+CREATE TABLE IF NOT EXISTS problem_solutions (
+  id INTEGER PRIMARY KEY AUTOINCREMENT,
+  problem_id INTEGER NOT NULL,
+  variant INTEGER NOT NULL DEFAULT 1,
+  title TEXT NOT NULL DEFAULT '',
+  idea_md TEXT NOT NULL DEFAULT '',
+  explanation_md TEXT NOT NULL DEFAULT '',
+  code_cpp TEXT NOT NULL DEFAULT '',
+  complexity TEXT NOT NULL DEFAULT '',
+  tags_json TEXT NOT NULL DEFAULT '[]',
+  source TEXT NOT NULL DEFAULT 'llm',
+  created_at INTEGER NOT NULL,
+  updated_at INTEGER NOT NULL,
+  FOREIGN KEY(problem_id) REFERENCES problems(id) ON DELETE CASCADE
+);
+
 CREATE INDEX IF NOT EXISTS idx_submissions_user_created_at ON submissions(user_id, created_at DESC);
 CREATE INDEX IF NOT EXISTS idx_submissions_problem_created_at ON submissions(problem_id, created_at DESC);
+CREATE INDEX IF NOT EXISTS idx_submissions_contest_user_created_at ON submissions(contest_id, user_id, created_at DESC);
+CREATE INDEX IF NOT EXISTS idx_problem_tags_tag ON problem_tags(tag);
+CREATE INDEX IF NOT EXISTS idx_kb_article_links_problem_id ON kb_article_links(problem_id);
+CREATE INDEX IF NOT EXISTS idx_import_jobs_created_at ON import_jobs(created_at DESC);
+CREATE INDEX IF NOT EXISTS idx_import_jobs_status ON import_jobs(status, updated_at DESC);
+CREATE INDEX IF NOT EXISTS idx_import_job_items_job_status ON import_job_items(job_id, status, updated_at DESC);
+CREATE INDEX IF NOT EXISTS idx_problem_drafts_updated ON problem_drafts(updated_at DESC);
+CREATE INDEX IF NOT EXISTS idx_problem_solution_jobs_problem ON problem_solution_jobs(problem_id, created_at DESC);
+CREATE INDEX IF NOT EXISTS idx_problem_solutions_problem ON problem_solutions(problem_id, variant, id);