Add lucide icon sprite partial (todo §1); src/icons.ts generates only-used symbols from pinned lucide-static

src/icons.test.ts

@@ -0,0 +1,33 @@
+import assert from "node:assert/strict";
+import { readFileSync } from "node:fs";
+import { dirname, join } from "node:path";
+import { test } from "node:test";
+import { fileURLToPath } from "node:url";
+import * as ejs from "ejs";
+import { ICON_NAMES, buildIconSprite } from "./icons.ts";
+
+const rootDir = join(dirname(fileURLToPath(import.meta.url)), "..");
+const lucideDir = join(rootDir, "node_modules", "lucide-static", "icons");
+const partial = join(rootDir, "views", "partials", "icons.ejs");
+
+const symbolInner = (sprite: string, id: string): string =>
+  sprite.match(new RegExp(`<symbol id="${id}"[^>]*>(.*?)</symbol>`))?.[1] ?? "";
+
+test("icons partial inlines exactly the used lucide-static icons", async () => {
+  const built = buildIconSprite(lucideDir);
+
+  // The committed partial must be exactly the generator output — proves provenance
+  // and flags drift when the pinned lucide-static is bumped without regenerating.
+  assert.equal(readFileSync(partial, "utf8"), built);
+
+  const html = await ejs.renderFile(partial, {});
+  const ids = [...html.matchAll(/<symbol id="(i-[a-z-]+)"/g)].map((m) => m[1]);
+  assert.deepEqual(ids, Object.keys(ICON_NAMES)); // only the used icons, complete + ordered
+  assert.match(html.trimStart(), /^<svg width="0" height="0"[^>]*aria-hidden="true"/);
+
+  // Independent spot-checks: a wrong id→icon mapping is caught regardless of the builder.
+  assert.match(symbolInner(built, "i-x"), /M18 6 6 18/);
+  assert.match(symbolInner(built, "i-search"), /circle cx="11" cy="11" r="8"/);
+  assert.match(symbolInner(built, "i-kebab"), /circle cx="12" cy="12" r="1"/);
+  assert.match(symbolInner(built, "i-bell"), /M10\.268 21/); // lucide v1.18 path, not the mockup's older one
+});