fix: remove v0.1 experiment flag toggle from create feature modal

[Zaimwa9]

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• I have added information to docs/ if required so people know about the feature.
• I have filled in the "Changes" section below.
• I have filled in the "How did you test this code" section below.

Changes

Removes the legacy "Experiment flag" toggle from the create/edit feature modal — this was a v0.1 artifact superseded by the experiment freeze mechanism which checks for running experiments via the API.

How did you test this code?

• Manually

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Project	Deployment	Actions	Updated (UTC)
flagsmith-frontend-preview	Ready	Preview, Comment	Jul 14, 2026 6:28pm
flagsmith-frontend-staging	Ready	Preview, Comment	Jul 14, 2026 6:28pm

1 Skipped Deployment

Project	Deployment	Actions	Updated (UTC)
docs	Ignored	Preview	Jul 14, 2026 6:28pm

[github-actions]

Docker builds report

Image	Build Status	Security report
ghcr.io/flagsmith/flagsmith-api-test:pr-7907	Finished ✅	Skipped
ghcr.io/flagsmith/flagsmith-e2e:pr-7907	Finished ✅	Skipped
ghcr.io/flagsmith/flagsmith-api:pr-7907	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith:pr-7907	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith-private-cloud:pr-7907	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith-frontend:pr-7907	Finished ✅	Results ✅

[github-actions]

Playwright Test Results (oss - depot-ubuntu-latest-arm-16)

 4 passed

Details

 4 tests across 3 suites
 19.5 seconds
 a63233b
 🔄 Run: #17924 (attempt 1)

Playwright Test Results (oss - depot-ubuntu-latest-16)

 4 passed

Details

 4 tests across 3 suites
 19.2 seconds
 a63233b
 🔄 Run: #17924 (attempt 1)

Playwright Test Results (private-cloud - depot-ubuntu-latest-arm-16)

 1 passed

Details

 1 test across 1 suite
 1 minute, 11 seconds
 a63233b
 🔄 Run: #17924 (attempt 1)

Playwright Test Results (private-cloud - depot-ubuntu-latest-16)

 6 passed

Details

 6 tests across 5 suites
 56.3 seconds
 a63233b
 🔄 Run: #17924 (attempt 1)

Playwright Test Results (oss - depot-ubuntu-latest-arm-16)

 4 passed

Details

 4 tests across 3 suites
 46.5 seconds
 5f0cc53
 🔄 Run: #18139 (attempt 1)

Playwright Test Results (private-cloud - depot-ubuntu-latest-16)

 5 passed

Details

 5 tests across 4 suites
 17.9 seconds
 5f0cc53
 🔄 Run: #18139 (attempt 1)

Playwright Test Results (private-cloud - depot-ubuntu-latest-arm-16)

 1 passed

Details

 1 test across 1 suite
 1 minute, 6 seconds
 5f0cc53
 🔄 Run: #18139 (attempt 1)

Playwright Test Results (oss - depot-ubuntu-latest-16)

 4 passed

Details

 4 tests across 3 suites
 35 seconds
 5f0cc53
 🔄 Run: #18139 (attempt 1)

Playwright Test Results (oss - depot-ubuntu-latest-16)

 4 passed

Details

 4 tests across 3 suites
 10.5 seconds
 21587d7
 🔄 Run: #18256 (attempt 1)

Playwright Test Results (oss - depot-ubuntu-latest-arm-16)

 4 passed

Details

 4 tests across 3 suites
 45.9 seconds
 21587d7
 🔄 Run: #18256 (attempt 1)

Playwright Test Results (private-cloud - depot-ubuntu-latest-16)

 6 passed

Details

 6 tests across 5 suites
 42.2 seconds
 21587d7
 🔄 Run: #18256 (attempt 1)

Playwright Test Results (private-cloud - depot-ubuntu-latest-arm-16)

 4 passed

Details

 4 tests across 3 suites
 19 seconds
 21587d7
 🔄 Run: #18256 (attempt 1)

[github-actions]

Visual Regression

19 screenshots compared. See report for details.
View full report

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: ASSERTIVE

Plan: Pro Plus

Run ID: 07b77315-9f0d-423f-8cf1-9737dbc45864

📥 Commits

Reviewing files that changed from the base of the PR and between 5f0cc53 and 21587d7.

📒 Files selected for processing (3)

• frontend/common/services/useExperimentResults.ts
• frontend/common/types/requests.ts
• frontend/common/types/responses.ts

💤 Files with no reviewable changes (2)

• frontend/common/services/useExperimentResults.ts
• frontend/common/types/responses.ts

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📝 Walkthrough

Walkthrough

This change removes the experiment-mode feature creation flow. The create-experiment modal module and its results tab component are deleted, including experiment charting and statistics visualisations. The experimentMode and defaultExperiment props and related branching are removed from feature creation components, consolidating editing around CreateFlagModal. Experiment toggle logic and UI are removed, and experiment result request and response contracts are deleted or restructured.

Estimated code review effort: 3 (Moderate) | ~25 minutes

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_{Comment @coderabbitai help to get the list of available commands.}

[talissoncosta]

Just one small comment, but the PR looks good! Thanks for the cleanup @Zaimwa9 !

[Zaimwa9]

@talissoncosta ready for review

[talissoncosta]

Looks good!