Silent mode has no visual indicator that PasteShield is active and scanning

[NK2552003]

When silent mode is enabled, there is no status bar indicator, badge, or any persistent signal that PasteShield is actively scanning. A developer who enables silent mode and forgets about it has no way to know whether the extension is running, has found anything, or is even installed — until they open the sidebar manually.

Problem

Silent mode is PasteShield's recommended onboarding path:

"Perfect for new users who want visibility without interruption"

But there is nothing in the VS Code UI that tells a user in silent mode that PasteShield is doing anything. Concretely:

• No status bar item
• No badge count on the sidebar icon when unreviewed detections exist
• No notification when a detection is logged in silent mode
• The only feedback is the history sidebar — which must be opened manually
  For silent mode to work as an onboarding tool, it needs to be slightly visible — enough to remind the user that PasteShield is there and has found something.

Proposed solution

Scope:

• Add a VS Code status bar item (right-aligned, low priority) showing current mode:
  • $(shield) Active — blocking mode, no recent detections
  • $(shield) Silent — silent mode, no unreviewed detections
  • $(shield) Silent (3) — silent mode, 3 unreviewed detections
  • $(shield-x) Off — PasteShield disabled
• Clicking the status bar item:
  • If Off: prompt to enable
  • If Active / Silent: open a quick-pick to switch mode or open history sidebar
  • If unreviewed detections exist: open the history sidebar directly
• Status bar item colour:
  • Neutral when clean
  • statusBarItem.warningBackground when unreviewed detections exist

Acceptance criteria

• Status bar item is present in all PasteShield states (active, silent, off)
• Badge count shown in silent mode when unreviewed detections exist
• Clicking the item opens a quick-pick or the history sidebar depending on state
• Status bar item uses semantic VS Code colours (no hardcoded hex values)
• Item is removed when PasteShield is uninstalled

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