fix(inbox): don't auto-redirect after creating PR task from report

[rafaeelaudibert]

Summary

When creating a PR task from the inbox report detail pane, the app no longer auto-redirects to the task detail view. Instead:

• The task is added to the sidebar (unchanged — via invalidateTasks).
• The success toast now shows a View task action button that navigates to the task detail page on demand.

Changes

• useCreatePrReport.ts: dropped the void openTask(output.task) call from the createTask callback, captured the created task, and added a View task action to the success toast.

Test plan

• pnpm --filter code typecheck
• pnpm biome check on the changed file
• Manually create a PR from an inbox report and confirm it stays on the inbox, appears in the sidebar, and the toast's "View task" button opens the task.

[github-actions]

React Doctor found no issues in the changed files. 🎉

_{Reviewed by React Doctor for commit c1f5421.}

[greptile-apps]

_{Reviews (1): Last reviewed commit: "fix(inbox): don't auto-redirect after cr..." | Re-trigger Greptile}