fix: bump HEIF + image-enhancement CI timeout to 300s

HEIF decoding combined with image-enhancement (CLAHE + histogram +
multi-step corrections) exceeds 180s on GitHub Actions runners.
HEIC works fine (~4.5s) but HEIF specifically needs ~5min in CI.

tests/integration/format-matrix-comprehensive.test.ts

@@ -189,6 +189,8 @@ function needsFallback(fmt: FormatDef): boolean {
 }
 
 function getTimeout(fmt: FormatDef, toolId?: string): number | undefined {
+  if ((fmt.needsHeifDecoder || fmt.needsCliDecoder) && toolId === "image-enhancement")
+    return 300_000;
   if (fmt.needsHeifDecoder || fmt.needsCliDecoder) return 180_000;
   if (toolId === "image-enhancement") return 120_000;
   return undefined;
@@ -1051,22 +1053,26 @@ describe("HEIC/HEIF graceful handling", () => {
   for (const fmt of HEIF_FORMATS) {
     describe(`${fmt.name}`, () => {
       for (const tool of CORE_TOOLS) {
-        it(`${tool.id}: no crash`, async () => {
+        it(
-          const res = await callTool(tool.id, fmt, tool.settings);
+          `${tool.id}: no crash`,
-          if (!res) return;
+          async () => {
+            const res = await callTool(tool.id, fmt, tool.settings);
+            if (!res) return;
 
-          // Must never crash
+            // Must never crash
-          expect(res.statusCode).not.toBe(500);
+            expect(res.statusCode).not.toBe(500);
 
-          // Accept success (200) or clean error (400/422)
+            // Accept success (200) or clean error (400/422)
-          expect([200, 400, 422]).toContain(res.statusCode);
+            expect([200, 400, 422]).toContain(res.statusCode);
 
-          const body = JSON.parse(res.body);
+            const body = JSON.parse(res.body);
-          if (res.statusCode !== 200) {
+            if (res.statusCode !== 200) {
-            expect(body.error).toBeDefined();
+              expect(body.error).toBeDefined();
-            expect(typeof body.error).toBe("string");
+              expect(typeof body.error).toBe("string");
-          }
+            }
-        }, 180_000);
+          },
+          tool.id === "image-enhancement" ? 300_000 : 180_000,
+        );
       }
     });
   }

tests/integration/format-matrix.test.ts

@@ -485,11 +485,13 @@ describe("Cross-format matrix", () => {
         if (tool.id === "convert" && fmt.name === "PNG") continue;
 
         const perTestTimeout =
-          fmt.needsHeifDecoder || fmt.needsCliDecoder
+          (fmt.needsHeifDecoder || fmt.needsCliDecoder) && tool.id === "image-enhancement"
-            ? 180_000
+            ? 300_000
-            : tool.id === "image-enhancement"
+            : fmt.needsHeifDecoder || fmt.needsCliDecoder
-              ? 120_000
+              ? 180_000
-              : undefined;
+              : tool.id === "image-enhancement"
+                ? 120_000
+                : undefined;
 
         it(
           `${tool.label}`,

tests/integration/image-enhancement.test.ts

@@ -678,7 +678,7 @@ describe("Authentication", () => {
 
 // ── HEIF input ─────────────────────────────────────────────────
 describe("HEIF input", () => {
-  it("enhances HEIF (sample.heif) input", { timeout: 120_000 }, async () => {
+  it("enhances HEIF (sample.heif) input", { timeout: 300_000 }, async () => {
     const HEIF = readFileSync(join(FIXTURES, "formats", "sample.heif"));
     const res = await postTool({ mode: "auto" }, HEIF, "sample.heif", "image/heif");
     expect([200, 422]).toContain(res.statusCode);