chore: upgrade eslint plugins, remove eslint-plugin-github (#38046)

- Bump `eslint`, `typescript-eslint` and `eslint-plugin-unicorn` (to
v68), and configure the rules added in unicorn v66/v67/v68.
- Remove `eslint-plugin-github` and its workarounds (rules, type stub,
pnpm peer override, in-code `eslint-disable` comments); the rules worth
keeping are covered by `unicorn` equivalents.
- Apply the resulting fixes and autofixes across the JS codebase.

_Prepared with Claude (Opus 4.8)._

---------

Signed-off-by: wxiaoguang <wxiaoguang@gmail.com>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

web_src/js/utils/time.ts

@@ -37,7 +37,7 @@ export function firstStartDateAfterDate(inputDate: Date): number {
   }
   const dayOfWeek = inputDate.getUTCDay();
   const daysUntilSunday = 7 - dayOfWeek;
-  const resultDate = new Date(inputDate.getTime());
+  const resultDate = new Date(inputDate);
   resultDate.setUTCDate(resultDate.getUTCDate() + daysUntilSunday);
   return resultDate.valueOf();
 }