feat: Add documentation files including Code of Conduct, Contributing guidelines, and Security policy; update Markdown linting configuration and scripts

docs/api/client-articles/index.md

@@ -0,0 +1,10 @@
+# Client Articles
+
+Articles related to the EchoHub TUI client built with Terminal.Gui v2.
+
+## Topics
+
+- Terminal.Gui v2 patterns and conventions
+- Theme system and customization
+- Command system reference
+- Configuration management

docs/api/client-articles/toc.yml

@@ -0,0 +1,2 @@
+- name: Overview
+  href: index.md

docs/api/core-articles/index.md

@@ -0,0 +1,9 @@
+# Core Articles
+
+Articles related to the EchoHub.Core shared library.
+
+## Topics
+
+- Data models and DTOs
+- SignalR contract interface
+- Validation constants and shared rules

docs/api/core-articles/toc.yml

@@ -0,0 +1,2 @@
+- name: Overview
+  href: index.md

docs/api/index.md

@@ -0,0 +1,17 @@
+# API Reference
+
+Browse the generated API documentation for each EchoHub project.
+
+## Projects
+
+### [Client](client/EchoHub.Client.yml)
+
+Terminal.Gui v2 TUI application -- UI components, services, themes, and configuration.
+
+### [Core](core/EchoHub.Core.Constants.yml)
+
+Shared library -- DTOs, models, constants, and the SignalR client contract.
+
+### [Server](server/EchoHub.Server.Controllers.yml)
+
+ASP.NET Core server -- controllers, hubs, authentication, and data access.

docs/api/server-articles/index.md

@@ -0,0 +1,11 @@
+# Server Articles
+
+Articles related to the EchoHub server built with ASP.NET Core.
+
+## Topics
+
+- Authentication and JWT tokens
+- SignalR hub and real-time messaging
+- File upload and validation
+- Rate limiting configuration
+- Database schema and migrations

docs/api/server-articles/toc.yml

@@ -0,0 +1,2 @@
+- name: Overview
+  href: index.md

docs/api/toc.yml

@@ -0,0 +1,18 @@
+- name: Client
+  items:
+    - name: API Reference
+      href: ../_api_meta/client/toc.yml
+    - name: Articles
+      href: client-articles/
+- name: Core
+  items:
+    - name: API Reference
+      href: ../_api_meta/core/toc.yml
+    - name: Articles
+      href: core-articles/
+- name: Server
+  items:
+    - name: API Reference
+      href: ../_api_meta/server/toc.yml
+    - name: Articles
+      href: server-articles/

docs/docfx.json

@@ -8,7 +8,7 @@
           "files": ["EchoHub.Core.dll"]
         }
       ],
-      "dest": "api/core",
+      "dest": "_api_meta/core",
       "filter": "filterConfig.yml"
     },
     {
@@ -18,7 +18,7 @@
           "files": ["EchoHub.Server.dll"]
         }
       ],
-      "dest": "api/server",
+      "dest": "_api_meta/server",
       "filter": "filterConfig.yml"
     },
     {
@@ -28,7 +28,7 @@
           "files": ["EchoHub.Client.dll"]
         }
       ],
-      "dest": "api/client",
+      "dest": "_api_meta/client",
       "filter": "filterConfig.yml"
     }
   ],
@@ -36,7 +36,25 @@
     "content": [
       {
         "files": ["**/*.{md,yml}"],
-        "exclude": ["_site/**", "_temp/**"]
+        "exclude": ["_site/**", "_api_meta/**"]
+      },
+      {
+        "src": "_api_meta/core",
+        "dest": "api/core",
+        "files": ["*.yml", ".manifest"],
+        "exclude": ["toc.yml"]
+      },
+      {
+        "src": "_api_meta/server",
+        "dest": "api/server",
+        "files": ["*.yml", ".manifest"],
+        "exclude": ["toc.yml"]
+      },
+      {
+        "src": "_api_meta/client",
+        "dest": "api/client",
+        "files": ["*.yml", ".manifest"],
+        "exclude": ["toc.yml"]
       }
     ],
     "resource": [

docs/images/hue_icon.svg

@@ -1,4 +1,4 @@
-<svg width="800" height="800" viewBox="0 0 1000 1000" xmlns="http://www.w3.org/2000/svg">
+<svg width="32" height="32" viewBox="0 0 1000 1000" xmlns="http://www.w3.org/2000/svg">
     <g stroke="#E6C06E" stroke-width="28" fill="none" stroke-linecap="round" stroke-linejoin="round">
         <circle cx="500" cy="500" r="420" />
         <circle cx="500" cy="500" r="180" />