[Console vNext][3] Align Workflow Studio authoring UX with the vNext mocks

[AbigailDeng]

Parent: #3106

Product semantics reference: #3107

Target branch: codex/console-vnext

Goal

Align Workflow Studio with the vNext authoring mocks while reusing the current graph, YAML, draft-run, publish, and Team Member contracts.

Scope

• Workflow catalog and create/empty-document entry states.
• Node/tool picker, ordered workflow editing, inspector configuration, and mapping UX.
• Clear separation of draft, validation, test run, publish/bind, and serving state.
• Reliability settings and actionable validation findings.
• AI-proposed changes shown as reviewable changes before applying.
• Execution and schedule entry points that retain Team Member ownership.

Acceptance criteria

• Existing YAML remains round-trippable and is never silently rewritten by presentation-only edits.
• workflowId, Team memberId, and serving service identity are not collapsed.
• Test and publish actions expose accepted/completed/error states and retry guidance.
• Unsupported mock controls are hidden or explicitly blocked by linked contracts, not simulated locally.
• Empty, invalid, unsaved, stale, read-only, loading, and publish-conflict states are covered.
• Desktop and mobile authoring workflows remain reachable without clipped controls.