Phase A: integrate voice web UI into CLI app

[eanzhao]

Summary

This draft PR implements the Phase A scope of #205 only.

It integrates the browser-based voice UI into the existing CLI web app so aevatar voice --agent <actorId> can ensure the local UI host is running, point it at the selected backend, and open /voice?agent=<actorId>.

What Changed

• added a new aevatar voice CLI entrypoint for launching the Phase A voice page
• introduced a shared local app host launcher so chat and voice use the same probe/start/proxy-target flow
• added a dedicated /voice React page with microphone capture, websocket session handling, playout metrics, and provider/sample-rate controls
• added AudioWorklet encoder/decoder assets adapted from ChronoAIProject/voice-presence
• added websocket proxy support in the local CLI host and mapped /ws/voice/{actorId} in both workflow and mainnet hosts
• updated CLI README and added tests for the new command and websocket proxy path

Why

Issue #205 Phase A requires a browser voice UI first, with the CLI acting as the entrypoint. The Phase A goal is to reuse the existing web UI shell instead of introducing a parallel standalone host, while keeping the voice websocket path available from the backend hosts.

User / Developer Impact

• users can now run aevatar voice --agent <actorId> to open the browser voice UI directly
• the local CLI app can proxy /ws/voice/{actorId} traffic to the configured backend
• backend hosts now expose the voice websocket route needed by the browser client
• this PR intentionally does not include later phases such as background daemonization or non-browser voice clients

Validation

• npm run build in tools/Aevatar.Tools.Cli/Frontend
• dotnet test test/Aevatar.Tools.Cli.Tests/Aevatar.Tools.Cli.Tests.csproj --nologo -m:1 -p:UseSharedCompilation=false --filter 'FullyQualifiedName~VoiceCommandTests'
• dotnet test test/Aevatar.Tools.Cli.Tests/Aevatar.Tools.Cli.Tests.csproj --nologo -m:1 -p:UseSharedCompilation=false --filter 'FullyQualifiedName~RootCommandFactoryTests'
• dotnet test test/Aevatar.Tools.Cli.Tests/Aevatar.Tools.Cli.Tests.csproj --nologo -m:1 -p:UseSharedCompilation=false --filter 'FullyQualifiedName~AppPlaygroundHostTests'
• dotnet build src/workflow/Aevatar.Workflow.Host.Api/Aevatar.Workflow.Host.Api.csproj --nologo -m:1 -p:UseSharedCompilation=false
• dotnet build src/Aevatar.Mainnet.Host.Api/Aevatar.Mainnet.Host.Api.csproj --nologo -m:1 -p:UseSharedCompilation=false

Notes

• a pre-existing unrelated test in WorkflowStudioBranchCoverageTests still fails in the full Aevatar.Tools.Cli.Tests project run; it is outside this diff and was not changed here
• reference implementation source: ChronoAIProject/voice-presence

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 81.86%. Comparing base (82c0e8b) to head (5bb1fba).

@@            Coverage Diff             @@
##              dev     #213      +/-   ##
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- Coverage   81.87%   81.86%   -0.02%     
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  Files         786      786              
  Lines       50533    50533              
  Branches     6642     6642              
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- Hits        41376    41370       -6     
- Misses       6317     6323       +6     
  Partials     2840     2840              

Flag	Coverage Δ
ci	81.86% <ø> (-0.02%)	⬇️

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