fix(lint): address 4 oxlint errors on canonical-layer-pr2

- Remove unused filterNewResults import (events batch-add-results legacy
  path was removed in Phase 4 Task 4).
- Replace import() type annotation in sync-tournament-results test with
  a top-level type import (consistent-type-imports rule).
- Hoist tableName helper out of makeFakeDb closure so it's not recreated
  per call (consistent-function-scoping rule).
- eqeqeq: replace `!= null` with explicit null/undefined checks in
  tournament-identity.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

app/lib/tournament-identity.ts

@@ -33,7 +33,7 @@ export function extractTournamentIdentity(ev: ScoringEventIdentityInput): Tourna
     cleanName = trimmed.replace(YEAR_SUFFIX, "").trim();
   }
 
-  if (year === null && ev.eventDate != null) {
+  if (year === null && ev.eventDate !== null && ev.eventDate !== undefined) {
     const iso = ev.eventDate instanceof Date
       ? ev.eventDate.toISOString()
       : String(ev.eventDate);

app/routes/admin.sports-seasons.$id.events.$eventId.server.ts

@@ -16,7 +16,7 @@ import {
   type CreateEventResultData,
   type UpdateEventResultData,
 } from "~/models/event-result";
-import { filterNewResults, findParticipantsWithoutResults } from "./admin.sports-seasons.$id.events.$eventId.helpers";
+import { findParticipantsWithoutResults } from "./admin.sports-seasons.$id.events.$eventId.helpers";
 import { findParticipantResultsBySportsSeasonId } from "~/models/participant-result";
 import {
   upsertParticipantSeasonResult,

app/services/__tests__/sync-tournament-results.test.ts

@@ -1,4 +1,5 @@
 import { describe, it, expect, vi, beforeEach } from "vitest";
+import type * as DrizzleOrm from "drizzle-orm";
 
 vi.mock("~/database/context", () => ({
   database: vi.fn(),
@@ -78,6 +79,18 @@ interface FakeDbState {
  * The service passes schema.tournamentResults etc., so we capture the real
  * schema module and compare by ref.
  */
+
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
+function tableName(table: any): string {
+  // drizzle-orm PgTable exposes the table name under a symbol. Try a few.
+  const sym = Object.getOwnPropertySymbols(table).find(
+    (s) => s.toString() === "Symbol(drizzle:Name)"
+  );
+  if (sym) return table[sym];
+  // Fallback for our shim: read `.tableName` property if set.
+  return table.tableName;
+}
+
 function makeFakeDb(state: FakeDbState) {
   // We mirror the shape in a lazy way: each predicate function is stored on the
   // call so we can match rows. In practice the service only filters by simple
@@ -90,9 +103,6 @@ function makeFakeDb(state: FakeDbState) {
   // eslint-disable-next-line @typescript-eslint/no-explicit-any
   function rowsFor(table: any): any[] {
     // Table objects are drizzle PgTable objects; we identify them by name.
-    // drizzle PgTables expose `[Symbol.for("drizzle:Name")]` but simpler: we
-    // just check a known property. Schema tables have `._.name`.
-    // Fallback: we compare string representation.
     const name = tableName(table);
     switch (name) {
       case "tournament_results":
@@ -108,17 +118,6 @@ function makeFakeDb(state: FakeDbState) {
     }
   }
 
-  // eslint-disable-next-line @typescript-eslint/no-explicit-any
-  function tableName(table: any): string {
-    // drizzle-orm PgTable exposes the table name under a symbol. Try a few.
-    const sym = Object.getOwnPropertySymbols(table).find(
-      (s) => s.toString() === "Symbol(drizzle:Name)"
-    );
-    if (sym) return table[sym];
-    // Fallback for our shim: read `.tableName` property if set.
-    return table.tableName;
-  }
-
   const db = {
     // ---------- select ----------
     select: vi.fn().mockImplementation(() => {
@@ -208,7 +207,7 @@ function makeFakeDb(state: FakeDbState) {
 // ---------------------------------------------------------------------------
 
 vi.mock("drizzle-orm", async () => {
-  const actual = await vi.importActual<typeof import("drizzle-orm")>("drizzle-orm");
+  const actual = await vi.importActual<typeof DrizzleOrm>("drizzle-orm");
   return {
     ...actual,
     // eslint-disable-next-line @typescript-eslint/no-explicit-any