fix(webapp): use useFetcher for env var edits to preserve scroll/toggle state #4001

Job	Run time
typecheck / typecheck	6m 12s
units / packages / 🧪 Unit Tests: Packages (1, 1)	7m 48s
e2e / 🧪 CLI v3 tests (windows-latest - npm)	3m 18s
e2e / 🧪 CLI v3 tests (ubuntu-latest - pnpm)	1m 50s
units / internal / 🧪 Unit Tests: Internal (3, 8)	5m 35s
e2e / 🧪 CLI v3 tests (ubuntu-latest - npm)	1m 46s
units / webapp / 🧪 Unit Tests: Webapp (3, 8)	6m 30s
e2e / 🧪 CLI v3 tests (windows-latest - pnpm)	3m 54s
units / internal / 🧪 Unit Tests: Internal (4, 8)	4m 52s
units / internal / 🧪 Unit Tests: Internal (1, 8)	5m 33s
units / internal / 🧪 Unit Tests: Internal (6, 8)	4m 15s
units / webapp / 🧪 Unit Tests: Webapp (7, 8)	5m 33s
units / internal / 🧪 Unit Tests: Internal (5, 8)	3m 45s
units / internal / 🧪 Unit Tests: Internal (2, 8)	4m 34s
units / webapp / 🧪 Unit Tests: Webapp (1, 8)	5m 21s
units / webapp / 🧪 Unit Tests: Webapp (2, 8)	3m 53s
units / webapp / 🧪 Unit Tests: Webapp (5, 8)	7m 26s
units / webapp / 🧪 Unit Tests: Webapp (6, 8)	2m 28s
units / webapp / 🧪 Unit Tests: Webapp (8, 8)	2m 13s
units / internal / 🧪 Unit Tests: Internal (7, 8)	4m 42s
units / internal / 🧪 Unit Tests: Internal (8, 8)	2m 43s
units / webapp / 🧪 Unit Tests: Webapp (4, 8)	3m 31s
units / internal / 📊 Merge Reports	25s
units / webapp / 📊 Merge Reports	55s
units / packages / 📊 Merge Reports	18s
	1h 39m 20s

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