chore(docs): update navigation and home page for new sections

Extend oxidoc.toml to include the Graph Engine, Document Engine, and
NodeDB-Lite entries in the sidebar navigation. Update home.rdx to
reflect the full feature surface and link to the new sections.

Author: farhan-syah

home.rdx

@@ -5,32 +5,38 @@ layout: landing
 ---
 
 <Hero title="NodeDB">
-<HeroAction label="Get Started" href="/docs/getting-started/quickstart" variant="primary" />
+<HeroAction label="Get Started" href="/getting-started/quickstart" variant="primary" />
 <HeroAction label="GitHub" href="https://github.com/NodeDB/nodedb" variant="secondary" />
 
-One database for vectors, metadata, CRDTs, and timeseries. Built for multi-modal AI and agentic workloads.
+One database for vectors, graphs, documents, metadata, state, and metrics. Built for multi-modal AI and agentic workloads.
 </Hero>
 
 <Section bg="muted">
 <FeatureGrid>
-<Feature icon="brain" title="Four Engines, One Binary">
-Vector (HNSW), Sparse/Metadata (B-Tree + BM25), CRDT (episodic state), and Timeseries — unified with shared storage and zero network hops.
+<Feature icon="brain" title="Six Engines, One Binary">
+Vector (HNSW), Graph (CSR), Document (MessagePack/redb), Sparse/Metadata (B-Tree + BM25), CRDT (episodic state), and Timeseries — unified with shared storage and zero network hops.
 </Feature>
 <Feature icon="zap" title="Hybrid Execution Model">
 Tokio Control Plane for query planning, Thread-per-Core Data Plane with io_uring for physical execution. Lock-free SPSC bridge between them.
 </Feature>
-<Feature icon="database" title="Postgres Compatible">
-Speaks the PostgreSQL wire protocol. Use psql, any ORM, or any Postgres driver in any language.
+<Feature icon="smartphone" title="Edge-Native with NodeDB-Lite">
+Embedded SQLite-like client for phones, tablets, browsers, and desktops. Offline-first with vector search and CRDT sync via WebSocket to Origin.
+</Feature>
+<Feature icon="globe" title="Graph Engine">
+Compressed Sparse Row (CSR) format for graph traversal. Low-latency neighborhood queries, multi-hop paths, and graph analytics without external tools.
+</Feature>
+<Feature icon="file-text" title="Document Engine">
+MessagePack-encoded documents with full-text search. Store semi-structured JSON-like data with automatic indexing and BM25 ranking.
 </Feature>
 <Feature icon="shield" title="Production Grade">
-WAL with O_DIRECT, tiered storage (RAM/NVMe/S3), Multi-Raft consensus, mTLS, tenant isolation.
+WAL with O_DIRECT, tiered storage (RAM/NVMe/S3), Multi-Raft consensus, mTLS, tenant isolation, and 1,253 tests across 92K+ lines in 12 crates.
 </Feature>
 </FeatureGrid>
 </Section>
 
 <Section>
 <CTA title="Ready to build?" description="Get NodeDB running in under a minute.">
-<HeroAction label="Quickstart" href="/docs/getting-started/quickstart" variant="primary" />
-<HeroAction label="Architecture" href="/docs/architecture/overview" variant="secondary" />
+<HeroAction label="Quickstart" href="/getting-started/quickstart" variant="primary" />
+<HeroAction label="Architecture" href="/concepts/overview" variant="secondary" />
 </CTA>
 </Section>

oxidoc.toml

@@ -22,6 +22,7 @@ header_links = [
   { label = "Drivers", href = "/drivers" },
   { label = "Operations", href = "/operations" },
   { label = "Reference", href = "/reference" },
+  { label = "NodeDB-Lite", href = "/nodedb-lite" },
 ]
 navigation = [
 
@@ -91,6 +92,17 @@ navigation = [
       "vector/pre-filtering",
       "vector/indexing-params",
     ] },
+    { group = "Graph Engine", pages = [
+      "graph/overview",
+      "graph/csr-index",
+      "graph/traversal",
+      "graph/graphrag",
+    ] },
+    { group = "Document Engine", pages = [
+      "document/overview",
+      "document/secondary-indexes",
+      "document/json-functions",
+    ] },
     { group = "Sparse & Metadata Engine", pages = [
       "sparse/overview",
       "sparse/btree-indexes",
@@ -126,6 +138,8 @@ navigation = [
       "select",
       "insert-upsert",
       "update-delete",
+      "joins",
+      "aggregations",
       "ddl",
       "explain",
       "functions",
@@ -252,6 +266,24 @@ navigation = [
       "defaults",
     ] },
   ] },
+
+  # ── NodeDB-Lite ──────────────────────────────────────────────
+  { path = "/nodedb-lite", dir = "nodedb-lite", groups = [
+    { group = "Overview", pages = [
+      "overview",
+      "quickstart",
+    ] },
+    { group = "SDKs", pages = [
+      "rust-sdk",
+      "javascript-sdk",
+      "ios-android",
+    ] },
+    { group = "Sync", pages = [
+      "sync",
+      "shapes",
+      "compensation",
+    ] },
+  ] },
 ]
 
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