feat: make /app redirect to cloud agent in wasm

[dmichelin]

Description

Fix /app in Warp-on-Web so it opens the Cloud Agent start experience instead of a regular Agent tab or restored workspace state.

Linked Issue

N/A

Testing

• cargo fmt -p warp

• MACOSX_DEPLOYMENT_TARGET=10.14 cargo test -p warp uri::tests::test_app_web_link_rewrites_to_new_cloud_agent_conversation

• I have manually tested my changes locally with ./script/run
  https://www.loom.com/share/5c6aa6142e9a43e29519419de771104f

Agent Mode

• Warp Agent Mode - This PR was created via Warp's AI Agent Mode

CHANGELOG-BUG-FIX: Fixed /app in Warp-on-Web opening the wrong Agent experience instead of the Cloud Agent start page.

[oz-for-oss]

@dmichelin

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[oz-for-oss]

Overview

This PR rewrites Warp-on-Web /app launches to the Cloud Agent conversation action, skips restoring persisted state for that web-home launch URL, and adds a workspace source that opens a Cloud Agent tab in a fresh window.

Concerns

• The no-primary-window action path now constructs NewWorkspaceSource::AmbientAgent directly, bypassing the existing Cloud Agent add-tab gating; see the inline comment.
• For this user-facing change, please include screenshots or a screen recording demonstrating it working end to end.

Verdict

Found: 0 critical, 2 important, 0 suggestions

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[captainsafia]

Nice! It's awesome that we were able to get this to redirect to the cloud-mode prompt. I didn't see it in your demo but I assume everythign actually works fine with submitting a prompt via this new redirect and then transitioning to the sesion share for that conversation?

[dmichelin]

Nice! It's awesome that we were able to get this to redirect to the cloud-mode prompt. I didn't see it in your demo but I assume everythign actually works fine with submitting a prompt via this new redirect and then transitioning to the sesion share for that conversation?

Since this goes to a namespace agent I'm not able to test it end to end locally afaik, but since it's launching the namespace task and starting a conversation I assume that you can session share

It basically hangs here at `creating environment`, but it does the same behavior when launching a cloud agent when running locally on master.