chore: STA-4061 macOS Electron visual proof (scratch, not for merge)

visual-proof/README.md

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+# Visual proof (macOS Electron) — STA-4061 / PR 14132
+
+Scratch-branch hosting only. Not part of the product.
+
+macOS 26.5.1 (25F80), Orca 1.4.178-rc.2, Electron 43.1.0,
+branch brennanb2025/sta-4061-cookie-partition-rollback.

visual-proof/vitest-after-fix.txt

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+[WARN] The "pnpm" field in package.json is no longer read by pnpm. The following keys were ignored: "pnpm.overrides", "pnpm.supportedArchitectures", "pnpm.onlyBuiltDependencies", "pnpm.patchedDependencies". See https://pnpm.io/settings for the new home of each setting.
+
+ RUN  v4.1.5 /Users/brennanbenson/orca/workspaces/orca/sta-4061-cookie-partition-rollback
+
+ ✓ src/main/browser/browser-cookie-import-partition-rollback.electron.test.ts (1 test) 731ms
+     ✓ never resurrects a removed partitioned cookie  724ms
+
+ Test Files  1 passed (1)
+      Tests  1 passed (1)
+   Start at  18:17:34
+   Duration  948ms (transform 28ms, setup 25ms, import 63ms, tests 731ms, environment 0ms)
+

visual-proof/vitest-before-fix.txt

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+[WARN] The "pnpm" field in package.json is no longer read by pnpm. The following keys were ignored: "pnpm.overrides", "pnpm.supportedArchitectures", "pnpm.onlyBuiltDependencies", "pnpm.patchedDependencies". See https://pnpm.io/settings for the new home of each setting.
+
+ RUN  v4.1.5 /Users/brennanbenson/orca/workspaces/orca/sta-4061-cookie-partition-rollback
+
+ ❯ src/main/browser/browser-cookie-import-partition-rollback.electron.test.ts (1 test | 1 failed) 617ms
+     × never resurrects a removed partitioned cookie 611ms
+
+⎯⎯⎯⎯⎯⎯⎯ Failed Tests 1 ⎯⎯⎯⎯⎯⎯⎯
+
+ FAIL  src/main/browser/browser-cookie-import-partition-rollback.electron.test.ts > non-Google partitioned cookie under a failed Electron cookie clear > never resurrects a removed partitioned cookie
+AssertionError: chips-auth survived: [{"name":"chips-auth","value":"keep-me"}]: expected [ { name: 'chips-auth', …(1) } ] to deeply equal []
+
+- Expected
++ Received
+
+- []
++ [
++   {
++     "name": "chips-auth",
++     "value": "keep-me",
++   },
++ ]
+
+ ❯ src/main/browser/browser-cookie-import-partition-rollback.electron.test.ts:172:7
+    170|       result.remainingChips,
+    171|       `chips-auth survived: ${JSON.stringify(result.remainingChips)}`
+    172|     ).toEqual([])
+       |       ^
+    173|     expect(result.remainingPlain).toEqual([])
+    174|   }, 90_000)
+
+⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯[1/1]⎯
+
+
+ Test Files  1 failed (1)
+      Tests  1 failed (1)
+   Start at  18:18:33
+   Duration  823ms (transform 22ms, setup 20ms, import 53ms, tests 617ms, environment 0ms)
+