weight and maintain specific order for foundational tips

[meganrogge]

fix #297018

• Tip ordering is catalog-driven with tier + priority.
• Selection order is:
  1. eligible foundational tips (sorted by priority)
  2. then QoL tips
• Current foundational priority is:
  switchToAuto -> agentMode -> planMode -> createAgent -> createSkill -> createInstruction.
• Stable rerender still preserves current tip, except:
  • if gpt-4.1 becomes active and switchToAuto is eligible, it now preempts and shows immediately.

demo-weighted.mov

[Copilot]

Pull request overview

Updates the Chat Tip system to deliver a more coherent onboarding flow by introducing catalog-driven tiers (Foundational vs QoL) and priority-based ordering, while preserving stable rerender behavior with a special-case preemption for the “switch to auto” tip.

Changes:

• Introduces ChatTipTier and priority metadata in the tip catalog to control ordering.
• Updates ChatTipService selection/navigation to prefer eligible Foundational tips (priority order) before QoL tips (randomized when only QoL remains).
• Adds/updates tests to validate ordering, navigation behavior, and QoL randomization.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 3 comments.

File	Description
src/vs/workbench/contrib/chat/browser/chatTipCatalog.ts	Adds ChatTipTier + priority and annotates all tips with tiering metadata.
src/vs/workbench/contrib/chat/browser/chatTipService.ts	Refactors tip selection to use tier/priority ordering and adds stable rerender preemption behavior for tip.switchToAuto.
src/vs/workbench/contrib/chat/test/browser/chatTipService.test.ts	Expands coverage for tier ordering, navigation ordering, and QoL randomization behavior.