Fix dashboard API redirect handling and scope wrangler config

- api.ts: add redirect:'manual' to all Worker fetch calls so that
  Cloudflare Access login redirects (302) surface as HTTP errors
  instead of silently returning HTML that breaks JSON.parse
- Add dashboard/wrangler.toml so the adapter-cloudflare dev server
  stops walking up to the root wrangler.jsonc (which was injecting
  the Worker's WORKER_URL env var into the dashboard process)
- Update .gitignore to cover .dev.vars; update .env.example to
  document both Vite (.env) and wrangler (.dev.vars) dev patterns

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: tbjers

dashboard/.env.example

@@ -1,2 +1,7 @@
-# Copy to .env for local development
+# For local development with `npm run dev` (Vite):
+# Copy to .env
+#
+# For local development with `wrangler pages dev` (simulates Cloudflare runtime):
+# Copy to .dev.vars
+
 WORKER_URL=https://coverage-tracker.yourdomain.com

dashboard/.gitignore

@@ -4,3 +4,4 @@ build/
 .env
 .env.*
 !.env.example
+.dev.vars

dashboard/src/lib/api.ts

@@ -7,6 +7,7 @@ export async function fetchProjects(
 ): Promise<ProjectRow[]> {
   const res = await fetchFn(`${workerUrl}/api/projects`, {
     headers: { 'Cf-Access-Jwt-Assertion': jwt },
+    redirect: 'manual',
   });
   if (!res.ok) throw new Error(`Failed to fetch projects: HTTP ${res.status}`);
   return res.json() as Promise<ProjectRow[]>;
@@ -28,6 +29,7 @@ export async function fetchTrend(
   url.searchParams.set('limit', String(limit));
   const res = await fetchFn(url.toString(), {
     headers: { 'Cf-Access-Jwt-Assertion': jwt },
+    redirect: 'manual',
   });
   if (!res.ok) throw new Error(`Failed to fetch trend: HTTP ${res.status}`);
   return res.json() as Promise<TrendResponse>;

dashboard/wrangler.toml

@@ -0,0 +1,3 @@
+name = "coverage-tracker-dashboard"
+compatibility_date = "2024-11-01"
+pages_build_output_dir = ".svelte-kit/cloudflare"