docs: swap header logo to webp, move meme logo to bottom

Replace header logo with assets/logo.webp across all 6 README
language variants and move the original meme logo (logo.jpg)
to the bottom of each file.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

README.fr.md

@@ -1,5 +1,5 @@
 <div align="center">
-  <img src="assets/logo.jpg" alt="PicoClaw" width="512">
+  <img src="assets/logo.webp" alt="PicoClaw" width="512">
 
   <h1>PicoClaw : Assistant IA Ultra-Efficace en Go</h1>
 
@@ -1203,3 +1203,9 @@ Cela se produit lorsqu'une autre instance du bot est en cours d'exécution. Assu
 | **Zhipu**        | 200K tokens/mois     | Idéal pour les utilisateurs chinois   |
 | **Brave Search** | 2000 requêtes/mois   | Fonctionnalité de recherche web       |
 | **Groq**         | Offre gratuite dispo | Inférence ultra-rapide (Llama, Mixtral) |
+
+---
+
+<div align="center">
+  <img src="assets/logo.jpg" alt="PicoClaw Meme" width="512">
+</div>

README.ja.md

@@ -1,5 +1,5 @@
 <div align="center">
-<img src="assets/logo.jpg" alt="PicoClaw" width="512">
+<img src="assets/logo.webp" alt="PicoClaw" width="512">
 
 <h1>PicoClaw: Go で書かれた超効率 AI アシスタント</h1>
 
@@ -1126,3 +1126,9 @@ Web 検索を有効にするには：
 | **Tavily** | 月 1000 クエリ | AI エージェント検索最適化 |
 | **Groq** | 無料枠あり | 高速推論（Llama, Mixtral） |
 | **Cerebras** | 無料枠あり | 高速推論（Llama, Qwen など） |
+
+---
+
+<div align="center">
+  <img src="assets/logo.jpg" alt="PicoClaw Meme" width="512">
+</div>

README.md

@@ -1,5 +1,5 @@
 <div align="center">
-  <img src="assets/logo.jpg" alt="PicoClaw" width="512">
+  <img src="assets/logo.webp" alt="PicoClaw" width="512">
 
   <h1>PicoClaw: Ultra-Efficient AI Assistant in Go</h1>
 
@@ -1505,3 +1505,9 @@ This happens when another instance of the bot is running. Make sure only one `pi
 | **Groq**         | Free tier available      | Fast inference (Llama, Mixtral)       |
 | **Cerebras**     | Free tier available      | Fast inference (Llama, Qwen, etc.)    |
 | **LongCat**      | Up to 5M tokens/day      | Fast inference (free tier)            |
+
+---
+
+<div align="center">
+  <img src="assets/logo.jpg" alt="PicoClaw Meme" width="512">
+</div>

README.pt-br.md

@@ -1,5 +1,5 @@
 <div align="center">
-<img src="assets/logo.jpg" alt="PicoClaw" width="512">
+<img src="assets/logo.webp" alt="PicoClaw" width="512">
 
 <h1>PicoClaw: Assistente de IA Ultra-Eficiente em Go</h1>
 
@@ -1200,3 +1200,9 @@ Isso acontece quando outra instância do bot está em execução. Certifique-se
 | **Brave Search** | 2000 consultas/mês | Funcionalidade de busca web |
 | **Groq** | Plano gratuito disponível | Inferência ultra-rápida (Llama, Mixtral) |
 | **Cerebras** | Plano gratuito disponível | Inferência ultra-rápida (Llama 3.3 70B) |
+
+---
+
+<div align="center">
+  <img src="assets/logo.jpg" alt="PicoClaw Meme" width="512">
+</div>

README.vi.md

@@ -1,5 +1,5 @@
 <div align="center">
-<img src="assets/logo.jpg" alt="PicoClaw" width="512">
+<img src="assets/logo.webp" alt="PicoClaw" width="512">
 
 <h1>PicoClaw: Trợ lý AI Siêu Nhẹ viết bằng Go</h1>
 
@@ -1168,3 +1168,9 @@ Một số nhà cung cấp (như Zhipu) có bộ lọc nội dung nghiêm ngặt
 | **Zhipu** | 200K tokens/tháng | Tốt nhất cho người dùng Trung Quốc |
 | **Brave Search** | 2000 truy vấn/tháng | Chức năng tìm kiếm web |
 | **Groq** | Có gói miễn phí | Suy luận siêu nhanh (Llama, Mixtral) |
+
+---
+
+<div align="center">
+  <img src="assets/logo.jpg" alt="PicoClaw Meme" width="512">
+</div>

README.zh.md

@@ -1,5 +1,5 @@
 <div align="center">
-<img src="assets/logo.jpg" alt="PicoClaw" width="512">
+<img src="assets/logo.webp" alt="PicoClaw" width="512">
 
 <h1>PicoClaw: 基于Go语言的超高效 AI 助手</h1>
 
@@ -880,3 +880,9 @@ Discord: [https://discord.gg/V4sAZ9XWpN](https://discord.gg/V4sAZ9XWpN)
 | **Tavily** | 1000 次查询/月 | AI Agent 搜索优化 |
 | **Groq** | 提供免费层级 | 极速推理 (Llama, Mixtral) |
 | **LongCat** | 最多 5M tokens/天 | 推理速度快 (免费额度) |
+
+---
+
+<div align="center">
+  <img src="assets/logo.jpg" alt="PicoClaw Meme" width="512">
+</div>