From 6efbb61afc3283e30b1dc8f02f432a3ad0271ac6 Mon Sep 17 00:00:00 2001
From: dev <dev@local>
Date: Tue, 13 Oct 2026 08:49:37 +0530
Subject: [PATCH] Indexes on papers.share_token and mistake_tags.attempt_id

Both are per-request lookups (shared-paper view, result tags, dashboard
rollup) that full-scanned. Zero warnings, 25 tests green.
---
 src/db.rs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/db.rs b/src/db.rs
index 1e9d032..b5d2e45 100644
--- a/src/db.rs
+++ b/src/db.rs
@@ -22,7 +22,9 @@ pub async fn init_db(pool: &SqlitePool) -> anyhow::Result<()> {
          CREATE INDEX IF NOT EXISTS idx_papers_user ON papers(user_id);
          CREATE INDEX IF NOT EXISTS idx_attempts_paper ON attempts(paper_id);
          CREATE INDEX IF NOT EXISTS idx_attempts_user ON attempts(user_id);
-         CREATE INDEX IF NOT EXISTS idx_answers_attempt ON answers(attempt_id);",
+         CREATE INDEX IF NOT EXISTS idx_answers_attempt ON answers(attempt_id);
+         CREATE INDEX IF NOT EXISTS idx_papers_token ON papers(share_token);
+         CREATE INDEX IF NOT EXISTS idx_mistakes_attempt ON mistake_tags(attempt_id);",
     )
     .execute(pool)
     .await?;