Fix: Backend startup race conditions

[MathCunha16]

This pull request updates the application to version v0.1.19-alpha and introduces important fixes and improvements for Windows compatibility and startup reliability, especially regarding backend connectivity in the Tauri desktop client.

Key changes include:

Version Bump

• Updated all version references from 0.1.18-alpha to 0.1.19-alpha across the Go backend (version.go), Tauri Rust backend (Cargo.toml), frontend (package.json), and Tauri config (tauri.conf.json). [1] [2] [3] [4]

Windows Backend Launch Fixes

• Modified backend process spawning in backend.rs to prevent a visible console window from flashing up on Windows by setting the CREATE_NO_WINDOW flag when launching the Go backend.

Backend API Base URL Consistency and Reliability

• Changed all fallback and dynamically assigned backend API base URLs from localhost to 127.0.0.1 to avoid issues on Windows where localhost may resolve to ::1 (IPv6) while the backend only binds IPv4. This affects both the static fallback in client.ts and the dynamic assignment in RootLayout. [1] [2]

Startup Race Condition Fix

• Refactored RootLayout so that the native backend session (port and token handshake) is fully resolved before mounting any providers or components that might fire API queries. This prevents API requests from being sent to an incorrect or unavailable backend address during app startup, especially in production builds on Windows. [1] [2]

Code Cleanup

• Removed outdated comments and relocated the session initialization logic from RootLayoutInner to the top-level RootLayout component for clarity and correctness. [1] [2] [3] [4] [5]

These changes collectively improve the reliability of backend connectivity, especially on Windows, and ensure that the application only makes API requests after the backend session is ready.

Summary by CodeRabbit

• Novidades

  • Atualização da versão da aplicação para 0.1.19-alpha.
  • O backend agora inicia no Windows sem exibir uma janela de console.
  • Melhorada a conexão com o backend local em ambientes webview.

• Correções

  • O carregamento da interface agora aguarda a validação da sessão nativa e das informações do backend.
  • Falhas na inicialização exibem uma mensagem de erro com opção de tentar novamente.
  • O splash screen é encerrado corretamente após o sucesso ou falha da inicialização.

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📒 Files selected for processing (1)

• frontend/src/components/RootLayout.tsx

🚧 Files skipped from review as they are similar to previous changes (1)

• frontend/src/components/RootLayout.tsx

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📝 Walkthrough

Walkthrough

A versão da aplicação passa para 0.1.19-alpha. O backend evita a janela de console no Windows. O frontend usa 127.0.0.1 e resolve a sessão nativa antes de montar os provedores, com tratamento de erro e retry.

Changes

Versão e inicialização da aplicação

Layer / File(s)	Summary
Alinhamento da versão backend/internal/domain/model/version.go, frontend/package.json, frontend/src-tauri/Cargo.toml, frontend/src-tauri/tauri.conf.json	As versões do backend, frontend, pacote Tauri e aplicação passam para 0.1.19-alpha.
Inicialização do processo backend frontend/src-tauri/src/backend.rs	O comando é configurado antes da execução. No Windows, CREATE_NO_WINDOW impede a exibição da janela de console.
Inicialização e recuperação da sessão nativa frontend/src/api/client.ts, frontend/src/components/RootLayout.tsx	O fallback usa 127.0.0.1. Em Tauri, RootLayout resolve porta e token antes de montar os provedores. Falhas exibem erro e permitem retry. O splash é fechado após a inicialização.

Estimated code review effort: 3 (Moderate) | ~20 minutes

Sequence Diagram(s)

sequenceDiagram
  participant RootLayout
  participant TauriRuntime
  participant BackendProcess
  participant SplashScreen
  RootLayout->>TauriRuntime: solicita get_backend_info
  TauriRuntime->>BackendProcess: inicia o backend
  BackendProcess-->>TauriRuntime: retorna porta e token
  TauriRuntime-->>RootLayout: entrega porta e token
  RootLayout->>SplashScreen: fecha o splash após sucesso ou falha

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🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 1 functions across 4 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	O título descreve de forma clara e concisa a principal alteração: a correção de condições de corrida na inicialização do backend.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents

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Inline comments:
In `@frontend/src/components/RootLayout.tsx`:
- Around line 312-313: Altere o fluxo de inicialização de sessão no RootLayout
para não definir sessionReady como true no finally quando estiver executando no
Tauri. Em caso de falha de get_backend_info, exiba um estado de erro com opção
de reinicialização e só monte RootLayoutInner após obter porta e token válidos;
preserve o fallback existente para ambientes fora do Tauri.

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Repository UI (base), Organization UI (inherited)

Review profile: CHILL

Plan: Essentials

Run ID: 04695b9d-43c5-4271-bbe4-7fc373739567

📥 Commits

Reviewing files that changed from the base of the PR and between fe3d645 and 42b3bc4.

📒 Files selected for processing (7)

• backend/internal/domain/model/version.go
• frontend/package.json
• frontend/src-tauri/Cargo.toml
• frontend/src-tauri/src/backend.rs
• frontend/src-tauri/tauri.conf.json
• frontend/src/api/client.ts
• frontend/src/components/RootLayout.tsx

Included review availability: 4 reviews are currently available. Your included PR review attempts over the past 7 days set your current allowance at 5 reviews per hour.