fix: Restrict size of hidden values

[matthewelwell]

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• I have read the Contributing Guide.
• 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

Display hidden values as static length.

Note: this is just a quick fix for the UI nastiness, but there is likely a more permanent solution (e.g. remove the field from the UI, and API entirely).

How did you test this code?

Ran FE locally.

Before:

After:

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Project	Deployment	Actions	Updated
flagsmith-frontend-preview	Ready	Preview	Sep 15, 2026 9:17am UTC
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1 Skipped Deployment

Project	Deployment	Actions	Updated
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[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: ASSERTIVE

Plan: Advanced

Run ID: e99e116f-4dde-4871-9880-64687c2cc6f2

📥 Commits

Reviewing files that changed from the base of the PR and between e2fb680 and eb561ad.

📒 Files selected for processing (1)

• frontend/web/components/modals/CreateEditIntegrationModal.tsx

Included review availability: Your plan provides up to 8 included reviews per hour; 7 remain after this review.

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📝 Walkthrough

Walkthrough

Read-only hidden integration fields now display **********. The mask no longer uses the stored value to determine its length.

Priority: ⬇️ Low

Estimated code review effort: 1 (Trivial) | ~2 minutes

Merge Risk: ⚪ Minimal · up to eb561

The fixed placeholder addresses the reported overlap without exposing the stored hidden value or its length.

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[github-actions]

Docker builds report

Image	Build Status	Security report
ghcr.io/flagsmith/flagsmith-e2e:pr-8531	Finished ✅	Skipped
ghcr.io/flagsmith/flagsmith-api-test:pr-8531	Finished ✅	Skipped
ghcr.io/flagsmith/flagsmith-api:pr-8531	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith:pr-8531	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith-private-cloud:pr-8531	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith-frontend:pr-8531	Finished ✅	Results ✅

[github-actions]

✅ private-cloud · depot-ubuntu-latest-16 — run #20453 (attempt 1)

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

 2 passed

Details

 2 tests across 2 suites
 49.1 seconds
 eb561ad
 🔄 Run: #20453 (attempt 1)

🗂️ Previous results

✅ oss · depot-ubuntu-latest-arm-16 — run #20453 (attempt 1)

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

 1 passed

Details

 1 test across 1 suite
 45.8 seconds
 eb561ad
 🔄 Run: #20453 (attempt 1)

✅ private-cloud · depot-ubuntu-latest-arm-16 — run #20453 (attempt 1)

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

 1 passed

Details

 1 test across 1 suite
 4.5 seconds
 eb561ad
 🔄 Run: #20453 (attempt 1)

✅ oss · depot-ubuntu-latest-16 — run #20453 (attempt 1)

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

 2 passed

Details

 2 tests across 2 suites
 41.5 seconds
 eb561ad
 🔄 Run: #20453 (attempt 1)

[github-actions]

Visual Regression

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