feat: add emoji-regex and remove-accents dependencies; enhance chat and setup pages

- Added `emoji-regex` and `remove-accents` packages to improve text processing capabilities.
- Implemented automatic Ollama startup in the chat page for better user experience.
- Enhanced setup page to include GPU selection based on hardware specifications.
- Updated chat input to support real-time validation and improved user feedback.
- Refactored message handling in chat to incorporate new processing features.

lib/download-utils.ts

@@ -0,0 +1,97 @@
+import { invoke } from '@tauri-apps/api/core';
+
+/**
+ * URLs oficiais dos instaladores Ollama
+ */
+export const OLLAMA_DOWNLOAD_URLS = {
+  windows: 'https://ollama.com/download/OllamaSetup.exe',
+  mac: 'https://ollama.com/download/Ollama-darwin.zip',
+  linux: 'https://ollama.com/install.sh',
+} as const;
+
+/**
+ * Nomes dos arquivos de fallback locais
+ */
+export const LOCAL_INSTALLER_FILES = {
+  windows: 'OllamaSetup.exe',
+  mac: 'Ollama-darwin.zip',
+  linux: 'install.sh',
+} as const;
+
+export type OS = 'windows' | 'mac' | 'linux';
+
+/**
+ * Verifica se a URL oficial está disponível
+ */
+export async function checkOfficialUrlAvailable(os: OS): Promise<boolean> {
+  try {
+    const url = OLLAMA_DOWNLOAD_URLS[os];
+    return await invoke<boolean>('check_download_url', { url });
+  } catch (error) {
+    console.error('Erro ao verificar URL oficial:', error);
+    return false;
+  }
+}
+
+/**
+ * Verifica se o instalador local existe
+ */
+export async function checkLocalInstallerExists(os: OS): Promise<boolean> {
+  try {
+    const filename = LOCAL_INSTALLER_FILES[os];
+    const path = await invoke<string | null>('get_local_installer_path', { 
+      filename 
+    });
+    return path !== null;
+  } catch (error) {
+    console.error('Erro ao verificar instalador local:', error);
+    return false;
+  }
+}
+
+/**
+ * Faz download do instalador (oficial ou fallback)
+ * Retorna o caminho do arquivo baixado
+ */
+export async function downloadInstaller(os: OS): Promise<string> {
+  const url = OLLAMA_DOWNLOAD_URLS[os];
+  const filename = LOCAL_INSTALLER_FILES[os];
+  
+  try {
+    const filePath = await invoke<string>('download_installer', { 
+      url,
+      filename
+    });
+    return filePath;
+  } catch (error) {
+    throw new Error(`Falha ao baixar instalador: ${error}`);
+  }
+}
+
+/**
+ * Verifica se o instalador já foi baixado
+ */
+export async function getDownloadedInstallerPath(os: OS): Promise<string | null> {
+  const filename = LOCAL_INSTALLER_FILES[os];
+  try {
+    const path = await invoke<string | null>('get_downloaded_installer_path', { 
+      filename 
+    });
+    return path;
+  } catch (error) {
+    console.error('Erro ao verificar instalador baixado:', error);
+    return null;
+  }
+}
+
+/**
+ * Executa o instalador baixado
+ */
+export async function runInstaller(filePath: string): Promise<void> {
+  try {
+    await invoke('run_installer', { filePath });
+  } catch (error) {
+    throw new Error(`Falha ao executar instalador: ${error}`);
+  }
+}
+