rebase fixed

Author: Himanshujha7

app/api/streak/route.test.ts

@@ -103,6 +103,18 @@ describe('GET /api/streak', () => {
   });
 
   describe('parameter validation', () => {
+    it('returns 400 when grace=-1 is provided', async () => {
+      const response = await GET(
+        makeRequest({
+          user: 'octocat',
+          grace: '-1',
+        })
+      );
+      expect(response.status).toBe(400);
+      const body = await response.json();
+      expect(body.details.fieldErrors.grace[0]).toBe('grace must be an integer between 0 and 7');
+    });
+
     it('returns 400 Bad Request when ?layout= is set to an unsupported format', async () => {
       const response = await GET(
         makeRequest({
@@ -305,18 +317,15 @@ describe('GET /api/streak', () => {
       expect(fetchGitHubContributions).toHaveBeenCalled();
     });
 
-    it('returns valid SVG when grace exceeds max value', async () => {
+    it('returns 400 when grace exceeds max value', async () => {
       const response = await GET(
         makeRequest({
           user: 'octocat',
           grace: '999',
         })
       );
 
-      expect(response.status).toBe(200);
-
-      const body = await response.text();
-      expect(body).toContain('<svg');
+      expect(response.status).toBe(400);
     });
 
     it('embeds the username (uppercased) in the SVG title', async () => {

lib/validations.ts

@@ -223,8 +223,18 @@ const baseStreakParamsSchema = z.object({
   delta_format: z.enum(['percent', 'absolute', 'both']).catch('percent').default('percent'),
   width: dimensionParam('width', 100, 1200),
   height: dimensionParam('height', 80, 800),
-  grace: z.string().optional().transform(toGraceValue).default(1),
-  opacity: z.string().optional().transform(toOpacityValue).default(1.0),
+  grace: z
+    .string()
+    .optional()
+    .refine(
+      (val) => {
+        if (val === undefined) return true;
+        const parsed = Number(val);
+        return !isNaN(parsed) && Number.isInteger(parsed) && parsed >= 0 && parsed <= 7;
+      },
+      { message: 'grace must be an integer between 0 and 7' }
+    )
+    .transform((val) => (val === undefined ? 1 : Number(val))),
   mode: z.enum(['commits', 'loc']).catch('commits').default('commits'),
   repo: z.string().optional(),
   org: z