Complete v1 of API reference

Author: ghostwriternr

src/content/docs/sandbox/api/commands.mdx

@@ -1,5 +1,5 @@
 ---
-title: Commands API
+title: Commands
 pcx_content_type: concept
 sidebar:
   order: 1

src/content/docs/sandbox/api/files.mdx

@@ -1,5 +1,5 @@
 ---
-title: Files API
+title: Files
 pcx_content_type: concept
 sidebar:
   order: 2

src/content/docs/sandbox/api/index.mdx

@@ -49,6 +49,22 @@ The Sandbox SDK is organized into focused APIs:
 	Execute Python and JavaScript code with rich outputs including charts, tables, and formatted data.
 </LinkTitleCard>
 
+<LinkTitleCard
+	title="Ports"
+	href="/sandbox/api/ports/"
+	icon="globe"
+>
+	Expose services running in the sandbox via preview URLs. Access web servers and APIs from the internet.
+</LinkTitleCard>
+
+<LinkTitleCard
+	title="Sessions"
+	href="/sandbox/api/sessions/"
+	icon="wrench"
+>
+	Advanced: Create isolated execution contexts with persistent shell state. Configure environment variables and manage container lifecycle.
+</LinkTitleCard>
+
 </CardGrid>
 
 ## Quick reference
@@ -98,13 +114,6 @@ The Sandbox SDK is organized into focused APIs:
 |--------|-------------|
 | `gitCheckout()` | Clone a repository into the sandbox |
 
-### Environment and sessions
-
-| Method | Description |
-|--------|-------------|
-| `setEnvVars()` | Set environment variables (must be called first) |
-| `createSession()` | Create an isolated execution session |
-
 ## Common patterns
 
 ### Error handling