fix(webapp): Fix backwards nextCursor for runs edge case #4749

Job	Run time
sdk-compat / Cloudflare Workers	2m 20s
typecheck / typecheck	6m 0s
sdk-compat / Deno Runtime	2m 6s
sdk-compat / Bun Runtime	1m 52s
sdk-compat / Node.js 22.12 (ubuntu-latest)	1m 46s
e2e / 🧪 CLI v3 tests (windows-latest - pnpm)	3m 36s
sdk-compat / Node.js 20.20 (ubuntu-latest)	1m 53s
e2e / 🧪 CLI v3 tests (ubuntu-latest - pnpm)	1m 52s
e2e / 🧪 CLI v3 tests (windows-latest - npm)	3m 32s
units / packages / 🧪 Unit Tests: Packages (1, 1)	8m 9s
e2e / 🧪 CLI v3 tests (ubuntu-latest - npm)	1m 47s
units / webapp / 🧪 Unit Tests: Webapp (2, 8)	3m 55s
units / webapp / 🧪 Unit Tests: Webapp (8, 8)	2m 24s
units / internal / 🧪 Unit Tests: Internal (5, 8)	3m 55s
units / internal / 🧪 Unit Tests: Internal (6, 8)	4m 45s
units / webapp / 🧪 Unit Tests: Webapp (6, 8)	3m 41s
units / internal / 🧪 Unit Tests: Internal (4, 8)	5m 9s
units / internal / 🧪 Unit Tests: Internal (3, 8)	6m 28s
units / internal / 🧪 Unit Tests: Internal (7, 8)	5m 26s
units / webapp / 🧪 Unit Tests: Webapp (3, 8)	3m 0s
units / webapp / 🧪 Unit Tests: Webapp (4, 8)	5m 34s
units / webapp / 🧪 Unit Tests: Webapp (7, 8)	5m 42s
units / webapp / 🧪 Unit Tests: Webapp (1, 8)	5m 41s
units / internal / 🧪 Unit Tests: Internal (2, 8)	9m 55s
units / internal / 🧪 Unit Tests: Internal (1, 8)	5m 57s
units / webapp / 🧪 Unit Tests: Webapp (5, 8)	7m 55s
units / internal / 🧪 Unit Tests: Internal (8, 8)	3m 19s
units / webapp / 📊 Merge Reports	44s
units / packages / 📊 Merge Reports	17s
units / internal / 📊 Merge Reports	20s
	1h 59m 0s

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