Initial commit: PastPaper Master full stack

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

supabase/migrations/006_make_scores_numeric.sql

@@ -0,0 +1,17 @@
+-- ============================================
+-- PastPaper Master — Make score fields numeric
+-- Version: 006
+-- Date: 2026-04-10
+-- ============================================
+
+ALTER TABLE paper_questions
+  ALTER COLUMN score TYPE NUMERIC
+  USING score::NUMERIC;
+
+ALTER TABLE papers
+  ALTER COLUMN total_score TYPE NUMERIC
+  USING total_score::NUMERIC;
+
+ALTER TABLE user_attempts
+  ALTER COLUMN score_given TYPE NUMERIC
+  USING score_given::NUMERIC;