Started PostgreSQL — data directory was uninitialized, ran initdb, set password, switched to md5 auth, all 24 migrations applied.

Hardened db.ts — added statement_timeout: 30000, idle_in_transaction_session_timeout: 10000, created transaction() helper (BEGIN/COMMIT/ROLLBACK).
Multi-step API routes wrapped in transactions — Events POST, Conversations POST use atomic blocks.
Fixed leads pagination — status filter pushed into SQL WHERE (no client-side filtering after LIMIT/OFFSET), added SELECT COUNT(*) for total.
Rewrote dashboard — SQL aggregations (COUNT + GROUP BY + date_trunc) replace loading all leads into memory.
Optimized conversations GET — merged duplicate correlated subqueries into single LEFT JOIN LATERAL.
Created migration 021_performance_indexes.sql — 8 missing indexes + set_session_user_context() function caching current_user_hierarchy_level() as session variable (avoids per-query RLS join).
Fixed build error — duplicate const other in conversations route. Also fixed a TypeScript never error in dashboard breakdown map.
Verified — npx tsc --noEmit clean, npm test (13 pass, 7 integration skip gracefully), npx next build succeeds.

tests/lib/sanitize.test.ts

@@ -0,0 +1,42 @@
+import { describe, it, expect } from "vitest"
+import { sanitizeSvg } from "@/lib/sanitize"
+
+describe("sanitizeSvg", () => {
+  it("strips script tags", () => {
+    const input = `<svg><script>alert('xss')</script><rect width="100" height="100"/></svg>`
+    const result = sanitizeSvg(input)
+    expect(result).not.toContain("script")
+    expect(result).toContain("<svg")
+    expect(result).toContain("<rect")
+  })
+
+  it("strips event handler attributes", () => {
+    const input = `<svg onload="alert(1)"><rect width="100" height="100"/></svg>`
+    const result = sanitizeSvg(input)
+    expect(result).not.toContain("onload")
+    expect(result).toContain("<svg")
+    expect(result).toContain("<rect")
+  })
+
+  it("strips onclick attributes", () => {
+    const input = `<svg><rect onclick="evil()" width="100" height="100"/></svg>`
+    const result = sanitizeSvg(input)
+    expect(result).not.toContain("onclick")
+    expect(result).toContain("<rect")
+    expect(result).toContain('width="100"')
+  })
+
+  it("removes javascript: URLs", () => {
+    const input = `<svg><a href="javascript:alert(1)">click</a></svg>`
+    const result = sanitizeSvg(input)
+    expect(result).not.toContain("javascript:")
+  })
+
+  it("passes through clean SVGs unchanged (except whitespace)", () => {
+    const input = `<svg viewBox="0 0 24 24"><circle cx="12" cy="12" r="10"/></svg>`
+    const result = sanitizeSvg(input)
+    expect(result).toContain("viewBox")
+    expect(result).toContain("<circle")
+    expect(result).toContain('cx="12"')
+  })
+})