fix: 2026-06-09 full-codebase audit hardening

Validation: shared NaN-guarded Zod coercion helpers in schemas/common.ts replace
the raw number|string transform idiom across every schema (the root-cause NaN bug
class); emailOrEmpty + lenient isoDateString/timeString.

Security: roles privilege-escalation closed; refresh-token family revocation on
reuse; TOTP uses config params; read endpoints permission-guarded; received-invoices
gross VAT on all paths; orders-pdf custom-items authz.

Concurrency: $queryRaw SELECT...FOR UPDATE locks in ascending-id order (warehouse
confirm/cancel, attendance lockUserRow); uniqueness checks moved into create
transactions (TOCTOU -> 409); deterministic id tiebreak on second-precision
timestamp ordering (plan resolveCell/resolveGrid, warehouse FIFO).

Frontend: Rules-of-Hooks fixed across ~14 pages + PlanCellModal; UTC-date persisted
fields; dashboard invalidation gaps; stale-closure confirm bugs.

Tooling/tests: ESLint flat config (react-hooks/rules-of-hooks = error) + Prettier;
tsconfig.test.json so tsc -b type-checks the tests; removed 3 dead deps; npm audit
fix (8 -> 3). Suite 195 -> 247 (happy-path auth, FIFO oldest-first, flakiness fixes),
isolated on app_test via .env.test with a hard-throw setup guard.

Gates: tsc 0 | build 0 | vitest 247/247 | eslint 0 errors.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/admin/components/odin/OdinSidebar.tsx

@@ -125,7 +125,19 @@ export default function OdinSidebar({
           return (
             <Box
               key={conv.id}
+              role="button"
+              tabIndex={busy ? -1 : 0}
+              aria-pressed={isActive}
               onClick={() => !busy && onSelect(conv.id)}
+              onKeyDown={(e) => {
+                // Activate the row on Enter/Space like a native button. The
+                // nested kebab IconButton stays a real <button> and handles its
+                // own keys (its onClick stopPropagation prevents row selection).
+                if (!busy && (e.key === "Enter" || e.key === " ")) {
+                  e.preventDefault();
+                  onSelect(conv.id);
+                }
+              }}
               sx={{
                 display: "flex",
                 alignItems: "center",
@@ -139,6 +151,7 @@ export default function OdinSidebar({
                   bgcolor: isActive ? "action.selected" : "action.hover",
                 },
                 "&:hover .odin-conv-menu": { opacity: 1 },
+                "&:focus-visible .odin-conv-menu": { opacity: 1 },
               }}
             >
               <Typography