Focus input element in Mistral chatbot

- in `apps/browser/src/content-scripts/send-prompt-content-script/chatbots/mistral.ts` focus on input after entering the message [Pasted text]

└── apps
    └── browser
        └── src
            └── content-scripts
                └── send-prompt-content-script
                    └── chatbots
                        ├── ai-studio.ts
                        ├── arena.ts
                        ├── chatgpt.ts
                        ├── claude.ts
                        ├── copilot.ts
                        ├── deepseek.ts
                        ├── doubao.ts
                        ├── gemini.ts
                        ├── github-copilot.ts
                        ├── grok.ts
                        ├── hugging-chat.ts
                        ├── index.ts
                        ├── kimi.ts
                        ├── meta.ts
                        ├── mistral.ts
                        ├── open-webui.ts
                        ├── openrouter.ts
                        ├── qwen.ts
                        ├── together.ts
                        ├── yuanbao.ts
                        └── z-ai.ts

Author: robertpiosik

apps/browser/src/content-scripts/send-prompt-content-script/chatbots/mistral.ts

@@ -108,6 +108,7 @@ export const mistral: Chatbot = {
 
     input_element.textContent = params.message
     input_element.dispatchEvent(new Event('input', { bubbles: true }))
+    input_element.focus()
     await new Promise((r) => requestAnimationFrame(r))
   },
   setup_observer: (params) => {