feat: improve beginner onboarding and model config sync

[zavier-bin]

Summary

This PR uploads the full current nofx-dev-week1 frontend onboarding and model configuration updates on top of dev.

The main goal is to make the beginner model setup flow consistent and remove refresh-dependent UI behavior after model configuration changes.

What Changed

Beginner onboarding flow

• beginner mode now shows the welcome onboarding route consistently instead of depending on a separate persisted completion flag
• the old local beginner_onboarding_completed flag helpers were removed
• continuing from the beginner onboarding page now relies on navigation flow instead of writing that extra local completion flag

Claw402 first-time setup

• saving the Claw402 model modal now auto-runs the existing beginner onboarding preparation flow when no wallet exists yet
• first-time users no longer need a separate one-click generation step after pressing save
• the returned beginner wallet address is persisted and reused in the trader page state
• the default beginner model is set to deepseek

Model configuration sync without refresh

• added a lightweight model-configs-updated event helper
• model updates and beginner onboarding preparation now emit that event
• the following screens now reactively refresh model-dependent UI without a manual page reload:
  • AI traders page and AI model status panel
  • strategy studio model list
  • Telegram config modal

Beginner guide copy

• updated the beginner guide so it points users to open the model modal and save directly
• removed the misleading separate one-click setup wording now that save already completes first-time setup

Claw402 modal UX

• first-time Claw402 save is allowed even without a manually entered private key
• helper copy explains that the wallet will be auto-generated on first save
• validation and submit button state now support both existing-wallet reuse and first-time auto-generation

Strategy activation error handling

• strategy activation now surfaces backend error messages instead of always showing a generic failure message

Testing

• docker compose build nofx-frontend

Notes

• This PR is intended to represent the current full state of the nofx-dev-week1 workspace for these onboarding and model-sync related changes.

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[github-actions]

🤖 Advisory Check Results

These are advisory checks to help improve code quality. They won't block your PR from being merged.

📋 PR Information

Title Format: ✅ Good - Follows Conventional Commits
PR Size: 🟡 Medium (355 lines: +194 -161)

🔧 Backend Checks

Go Formatting: ⚠️ Needs formatting

Files needing formatting

api/handler_wallet.go
api/utils_test.go
config/config.go
kernel/engine.go
kernel/formatter.go
kernel/grid_engine.go
kernel/validate_test.go
main.go
manager/trader_manager.go
market/data.go

Go Vet: ✅ Good
Tests: ✅ Passed

Fix locally:

go fmt ./...      # Format code
go vet ./...      # Check for issues
go test ./...     # Run tests

⚛️ Frontend Checks

Build & Type Check: ✅ Success

Fix locally:

cd web
npm run build  # Test build (includes type checking)

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• Contributing Guidelines
• Migration Guide

Questions? Feel free to ask in the comments! 🙏

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