Update tsconfig so that cmd+clicking takes you to source code, not d.ts file

[kdaviduik]

WHY are these changes introduced?

Previously, if I was in a file like templates/skeleton/app/root.tsx and I cmd+clicked on the function 'getShopifyAnalytics` (to go to its definition), I was taken to a d.ts file and not the actual source code in the Hydrogen package.

Now, I'm taken to the actual source code (ie: `packages/hydrogen/src/analytics-manager/AnalyticsProvider.tsx in this case).

WHAT is this pull request doing?

Sets declarationMap: true in this repo's tsconfig. Docs on declarationMap setting

HOW to test your changes?

Before Fix (Reproduce the Issue):

1. Check out main branch in IDE, run npm install && npm run build at the root
2. Reload TypeScript in your IDE:

• VSCode: Cmd+Shift+P → "TypeScript: Restart TS Server"

3. Open templates/skeleton/app/root.tsx
4. Cmd+Click on getShopAnalytics (line 81)
5. Result: 🔴 You're taken to packages/hydrogen/dist/production/index.d.ts
   (compiled declarations, no source code)

---

After Fix (Verify Solution):

1. Checkout my branch
2. Reload TypeScript: Cmd+Shift+P → "TypeScript: Restart TS Server"
3. Open templates/skeleton/app/root.tsx
4. Cmd+Click on getShopAnalytics (line 81)
5. Result: ✅ You're taken to
   packages/hydrogen/src/analytics-manager/AnalyticsProvider.tsx:440 (actual source
   code)

---

Post-merge steps

N/A

Checklist

• I've read the Contributing Guidelines
• I've considered possible cross-platform impacts (Mac, Linux, Windows)
• I've added a changeset if this PR contains user-facing or noteworthy changes
• I've added tests to cover my changes
• I've added or updated the documentation

[shopify]

Oxygen deployed a preview of your kd-tsconfig-fix branch. Details:

Storefront	Status	Preview link	Deployment details	Last update (UTC)
Skeleton (skeleton.hydrogen.shop)	⏳ In progress (Logs)	-	Inspect deployment	November 10, 2025 8:15 PM

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