fix(search): prevent-local-sync-state-keystroke-loss

[Zaimwa9]

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Closes #7199

Changes

• Drop the value → localValue sync effect in TableSearchFilter that was overwriting in-progress input (root cause of the keystroke eating).
• Add a searchResetKey from useFeatureFilters so "Clear Filters" remounts the input.
• Rewrite useDebounce with a useRef timer to avoid re-render churn and stale closures.

How did you test this code?

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Project	Deployment	Actions	Updated (UTC)
flagsmith-frontend-preview	Ready	Preview, Comment	Apr 19, 2026 9:48am
flagsmith-frontend-staging	Ready	Preview, Comment	Apr 19, 2026 9:48am

1 Skipped Deployment

Project	Deployment	Actions	Updated (UTC)
docs	Ignored		Apr 19, 2026 9:48am

[github-actions]

Docker builds report

Image	Build Status	Security report
ghcr.io/flagsmith/flagsmith-api-test:pr-7287	Finished ✅	Skipped
ghcr.io/flagsmith/flagsmith-e2e:pr-7287	Finished ✅	Skipped
ghcr.io/flagsmith/flagsmith-api:pr-7287	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith:pr-7287	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith-private-cloud:pr-7287	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith-frontend:pr-7287	Finished ✅	Results ✅

[github-actions]

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

 11 passed

Details

 11 tests across 8 suites
 9.4 seconds
 a07e73d
 🔄 Run: #16181 (attempt 1)

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

 11 passed

Details

 11 tests across 8 suites
 48.9 seconds
 a07e73d
 🔄 Run: #16181 (attempt 1)

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

 17 passed

Details

 17 tests across 14 suites
 53 seconds
 a07e73d
 🔄 Run: #16181 (attempt 1)

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

 1 passed

Details

 1 test across 1 suite
 1 minute, 11 seconds
 a07e73d
 🔄 Run: #16181 (attempt 1)

[github-actions]

Visual Regression

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

[talissoncosta]

Looks good, thanks for handling it! 👏 😃