feat(projects): add architecture diagrams, align project texts

Add diagrams to three projects. A tap opens them full size.
Align en/de texts: no versions, Gitea not GitHub, Portainer, home
server + VPS. Make To Be Played the featured project.
Remove the Hostinger logo image.

src/assets/i18n/en.json

@@ -212,9 +212,9 @@
         "LINK_EXTERNAL": "andreas-dahm.eu",
         "LINK_INTERNAL": "Project details",
         "HIGHLIGHTS": {
-          "P1": "Using modern technologies and CI/CD pipelines (Angular 20+, Spring Boot 4, GitHub).",
+          "P1": "Modern frontend stack and a CI/CD pipeline on Gitea Actions (Angular, Docker).",
           "P2": "Showcasing personal projects and improving algorithmic skills over time.",
-          "P3": "Deepening knowledge in JavaScript/TypeScript, Angular, Spring Boot and related technologies through hands-on practice."
+          "P3": "Deepening knowledge in JavaScript/TypeScript, Angular and related technologies through hands-on practice."
         }
       },
       "P1": {
@@ -301,6 +301,7 @@
   "PROJECTS": {
     "DOWNLOAD": "Download",
     "READ_MORE": "Read More",
+    "DIAGRAM_ALT": "Architecture diagram",
     "LINK_TO_PROJECT": "To the project",
     "CLOSE": "Close",
     "SECTION": {
@@ -309,11 +310,11 @@
     },
     "PLAYGROUND": {
       "TITLE": "Playground Portfolio",
-      "SHORT_DESCRIPTION": "Full-stack portfolio with interactive algorithm visualizations.",
+      "SHORT_DESCRIPTION": "Frontend portfolio with interactive algorithm visualizations.",
       "INTRODUCTION": "This website serves as a living portfolio and testing ground for modern web technologies. The goal is to clearly represent complex algorithms and mathematical concepts (such as WebGPU simulations or Raymarching) directly in the browser.",
-      "BULLET_1": "Development with Angular 19+ and Material Design.",
+      "BULLET_1": "Development with Angular and Material Design.",
       "BULLET_2": "Implementation of performant visualizations (WebGPU, Shader, Canvas).",
-      "BULLET_3": "Automated CI/CD pipelines and containerization with Docker.",
+      "BULLET_3": "Automated CI/CD with Gitea Actions and containerization with Docker.",
       "BULLET_4": "Internationalization (i18n) for global reach.",
       "CHALLENGE_1": "Optimizing render performance for complex 3D fractals in real-time.",
       "CHALLENGE_2": "Architecting a scalable and maintainable frontend structure for diverse sub-projects.",
@@ -322,11 +323,11 @@
     },
     "TRIBBLE": {
       "TITLE": "Self-Hosted Infrastructure",
-      "SHORT_DESCRIPTION": "Home infrastructure with Docker, Traefik, and secure VPN connectivity.",
-      "INTRODUCTION": "Documentation and construction of a private cloud infrastructure. Focus is on data sovereignty, automation, and security.",
+      "SHORT_DESCRIPTION": "Home server for CI and private services, plus a VPS for the public sites.",
+      "INTRODUCTION": "Two machines: the home server \"Tribble\" runs Gitea with its Actions runner and the private services, and a Hostinger VPS serves the public sites. CI builds the images at home, the VPS pulls new images over Tailscale with Watchtower, and Traefik routes the public sites.",
       "BULLET_1": "Central management via Docker-Compose and Portainer.",
       "BULLET_2": "Automatic SSL management and reverse proxy with Traefik.",
-      "BULLET_3": "Private version control (Gitea) and media streaming (Jellyfin).",
+      "BULLET_3": "Private version control and CI with Gitea, media streaming with Jellyfin.",
       "BULLET_4": "Network-wide ad-blocking and DNS control via AdGuard Home.",
       "CHALLENGE_1": "Configuring secure network layers and firewall rules for remote access.",
       "CHALLENGE_2": "Automating backups and recovery strategies for containerized data.",
@@ -336,14 +337,13 @@
     "EL_MUCHO": {
       "TITLE": "El Mucho (Steam Release)",
       "SHORT_DESCRIPTION": "Turn-based tactical RPG, published on Steam.",
-      "INTRODUCTION": "A commercial game project that was independently implemented from the initial idea to the worldwide release on Steam. A tactical RPG that combines classic gameplay elements with modern systems.",
-      "BULLET_1": "Complete engine development in Unity (C#).",
+      "INTRODUCTION": "A commercial game that my brother and I took from the first idea to the release on Steam: planned, built and sold. A tactical RPG that combines classic gameplay elements with modern systems.",
+      "BULLET_1": "Game development in Unity (C#).",
       "BULLET_2": "Integration of Steamworks features (Achievements, Cloud Saves).",
       "BULLET_3": "Development of a custom tactical AI and pathfinding logic.",
       "BULLET_4": "Management of the entire asset pipeline and sound design.",
       "CHALLENGE_1": "Implementing a robust turn-based system with complex dependencies.",
       "CHALLENGE_2": "Performance optimization for a smooth experience across various hardware profiles.",
-      "CHALLENGE_3": "Handling Steam's strict certification requirements.",
       "LEARNING_1": "Perseverance and focus over a multi-year development cycle.",
       "LEARNING_2": "Marketing and community management for a digital product."
     },