[LinuxDevil]

Prompts gets a screen: list, version history, side-by-side diff, label moves (through an explicit proxy write allowlist), and a working runs-using-this-version link via a new prompt= trace filter.

Ticket: F23 (Forge Observe vs LangSmith evaluation follow-up)

Changes

• refactor(studio): rename the prompts route parser (parsePromptRoute) so it no longer duplicates the Playground's parsePromptParam export
• fix(studio): reject dot and encoded-slash segments on observe proxy writes; accent/surface contrast pair
• feat(studio): prompts screen
• docs: regenerate llms-full for the trace list prompt filter
• feat(studio): observe proxy forwards an explicit write allowlist (prompt label move)
• feat(observe): filter the trace list by prompt (prompt=[@])

Verification: focused vitest, tsc --noEmit, eslint on changed files (details in the review package); full suite and fallow run in CI.

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