feat(console): advance Studio member-first frontend flows

[AbigailDeng]

Summary

This PR moves more of Studio's Build / Bind / Invoke / Observe frontend flow onto the new member-first backend contracts.

What changed

• added shared Studio member roster/detail models and decoders
• added studioApi.listMembers, studioApi.createMember, and studioApi.getMember
• updated the Studio left rail to enrich published members with backend roster authority
• updated workflow member creation to register backend member authority after creating the draft
• switched Observe to prefer member runs / member audit when memberId is available
• passed memberId through Bind / Invoke / Observe runtime control flows
• updated Build -> Bind to prefer bindMemberWorkflow when the current workflow maps to a backend member
• updated tests to cover the new member-first API and Studio behavior

Why

PR #428 landed backend member authority, roster, detail, binding, invoke, and runs routes. Studio frontend was still partially service-first, especially around Build -> Bind and Observe.

This PR closes a large part of that gap so the selected Studio member stays the main subject through the user flow.

Impacted paths

• apps/aevatar-console-web/src/shared/studio/models.ts
• apps/aevatar-console-web/src/shared/studio/api.ts
• apps/aevatar-console-web/src/pages/studio/index.tsx
• related Studio API and page tests

Verification

Passed:

pnpm --dir apps/aevatar-console-web test -- --runInBand src/shared/studio/api.test.ts src/pages/studio/components/bind/StudioMemberBindPanel.test.tsx src/pages/studio/components/StudioMemberInvokePanel.test.tsx src/pages/studio/index.test.tsx

pnpm --dir apps/aevatar-console-web exec tsc --noEmit --pretty false

tsc still reports pre-existing unrelated errors in Teams pages/tests:

• apps/aevatar-console-web/src/pages/teams/home.tsx:917
• apps/aevatar-console-web/src/pages/teams/home.tsx:981
• apps/aevatar-console-web/src/pages/teams/runtime/teamRuntimeLens.test.ts:77
• apps/aevatar-console-web/src/pages/teams/runtime/teamRuntimeLens.test.ts:430

Follow-up

The remaining backend API gap for full Studio de-serviceId cleanup is tracked in #454.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 70.90%. Comparing base (7c89f22) to head (f9c4dc9).

@@            Coverage Diff             @@
##              dev     #456      +/-   ##
==========================================
- Coverage   70.90%   70.90%   -0.01%     
==========================================
  Files        1209     1209              
  Lines       87045    87045              
  Branches    11411    11411              
==========================================
- Hits        61722    61716       -6     
- Misses      20876    20881       +5     
- Partials     4447     4448       +1     

Flag	Coverage Δ
ci	70.90% <ø> (-0.01%)	⬇️

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