docs: improve SEO descriptions (#282)

Author: NicholasKissel

docs/content/docs/authentication.mdx

@@ -1,6 +1,6 @@
 ---
 title: "Authentication"
-description: "Authenticating requests to a deployed app."
+description: "Authenticate requests to deployed Dynamic Apps with Hono middleware, route guards, and application-level authorization before handlers run."
 ---
 
 ## Authentication

docs/content/docs/background-work.mdx

@@ -1,6 +1,6 @@
 ---
 title: "Background Work"
-description: "Durable jobs and recurring schedules inside an app."
+description: "Run durable background jobs and recurring schedules inside Dynamic Apps with workflows, queues, and cron jobs that survive restarts."
 ---
 
 ## Workflows

docs/content/docs/index.mdx

@@ -1,6 +1,7 @@
 ---
 title: "Dynamic Apps"
-description: "Deploy user-generated applications in isolated VMs."
+seoTitle: "Dynamic Apps Documentation"
+description: "Deploy user-generated applications in isolated environments with durable state, workflows, realtime coordination, queues, and scheduled jobs."
 skill: true
 ---
 

docs/content/docs/quickstart.mdx

@@ -1,6 +1,6 @@
 ---
 title: "Quickstart"
-description: "Set up the server, deploy an AI-generated app, and visit it."
+description: "Set up a Dynamic Apps server, deploy an AI-generated application, connect the router, and verify the app from your browser."
 skill: true
 ---
 

docs/content/docs/realtime.mdx

@@ -1,6 +1,6 @@
 ---
 title: "Realtime"
-description: "Share realtime state between every user connected to an app."
+description: "Share realtime application state across connected users with actor-backed multiplayer coordination and automatic client synchronization."
 ---
 
 ## Multiplayer

docs/content/docs/reference.mdx

@@ -1,6 +1,6 @@
 ---
 title: "Reference"
-description: "Building apps with AI, and what is planned next."
+description: "Build and repair Dynamic Apps with AI-generated files, deployment diagnostics, and a practical roadmap for extending generated backends."
 ---
 
 ## Build Apps with AI
@@ -14,6 +14,6 @@ them back to the agent and deploy its repaired files again.
 ## Planned Improvements
 
 - Automatically include agent skills based on the
-  [Rivet Cookbooks](https://rivet.dev/cookbook/) for better app generation.
+  [Actors Learn guides](https://rivet.dev/actors/learn/) for better app generation.
 - Billing API for tracking and charging for app usage.
 - Built-in error reporting for generated apps.

docs/content/docs/routing.mdx

@@ -1,6 +1,6 @@
 ---
 title: "Route requests"
-description: "Mount deployed apps on your Hono server with appsRouter."
+description: "Mount deployed Dynamic Apps on a Hono server, route requests by application ID, and connect an explicit RivetKit client when needed."
 skill: true
 ---
 

docs/content/docs/state-and-data.mdx

@@ -1,6 +1,6 @@
 ---
 title: "State & Data"
-description: "Durable SQLite state and queued work inside an app."
+description: "Give Dynamic Apps durable SQLite state, queues, workflows, multiplayer coordination, and scheduled jobs within each application."
 ---
 
 Agents can generate more than pages and REST APIs. These examples show apps