feat(code): remove cloud status bar, add pr view button

[adboio]

Problem

cloud is a bit inconsistent with local

Changes

• removes the bottom status bar from the cloud page
  • we might want to re-add the cancelled/failed states, but...
  • in progress, stopped, completed states can all just be inferred from the agent output
• moves the "view PR" button to the top-right like local tasks

How did you test this?

[adboio]

• feat(code): remove cloud status bar, add pr view button #1476 👈 (View in Graphite)
• main

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