✨ [FFL-2858] Feature Flags tab — catalog browsing (stacked PR 2 of 3)

[kellyw1806]

Motivation

Stacked on #4913 (OAuth). With the sign in functionality, this PR helps include the fetch for the total feature-flag catalog. Users are now able to browse their feature-flag catalog. It does not involve overriding flags as that is the next PR (#4912).

Stack (review bottom-up)

	PR	Base	What it adds
1 of 3	#4913 · FFL-2597	main	OAuth sign-in
2 of 3	#4916 (this) · FFL-2858	ffl-2597	catalog browsing
3 of 3	#4912 · FFL-2596	ffl-2858	flag overrides

⚠️ Base is kelly.wang/ffl-2597, not main — merge #4913 first. This PR's diff is only the catalog layer.

Changes

• Fetches the catalog via the OAuth-capable GET /api/ui/ffe/feature-flags endpoint (paginated), transparently refreshing the token (getValidAccessToken, added here).
• Parses/maps flags + variants (defensive value parsing, dedupe-by-key), with search + type/tag filters and pagination.
• Expands the flags tab to render the catalog.

Demo

This is what the three PRs look like working together:

Screen.Recording.2026-07-24.at.5.14.31.PM.mov

Checklist

• Tested locally
• Tested on staging
• Added unit tests for this change (oauth.spec.ts — getValidAccessToken; flagCatalog.spec.ts).
• Added e2e/integration tests for this change.
• Updated documentation and/or relevant AGENTS.md file

[cit-pr-commenter-54b7da]

Bundles Sizes Evolution

📦 Bundle Name	Base Size	Local Size	𝚫	𝚫%	Status
Rum	179.09 KiB	179.09 KiB	0 B	0.00%	✅
Rum Profiler	8.43 KiB	8.43 KiB	0 B	0.00%	✅
Rum Recorder	21.12 KiB	21.12 KiB	0 B	0.00%	✅
Logs	55.71 KiB	55.71 KiB	0 B	0.00%	✅
Rum Salesforce	N/A	137.07 KiB	N/A	N/A	N/A
Rum Slim	137.06 KiB	137.06 KiB	0 B	0.00%	✅
Worker	22.96 KiB	22.96 KiB	0 B	0.00%	✅

[datadog-datadog-prod-us1]

 

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⚠️ Warnings

🚦 3 Pipeline jobs failed

DataDog/browser-sdk | unit-bs: [safari-desktop]     

DataDog/browser-sdk | e2e: [firefox-pinned]     

DataDog/browser-sdk | e2e: [firefox]     

ℹ️ Info

No other issues found (see more)

🧪 All tests passed
❄️ No new flaky tests detected

🎯 Code Coverage (details)
• Patch Coverage: 76.56%
• Overall Coverage: 77.25% (+0.02%)

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[BeltranBulbarellaDD]

@kellyw1806 In my opinion I would keep the stacked PR 2 and 3 in draft until the first one is approved. That way after changes are requested in the first one, this one remains clean for the reviewer.