feat: enable wasm-split for route-based code splitting

Enable Dioxus 0.7 automatic WASM bundle splitting by route:

- Add wasm-split feature to dioxus and dioxus-router in Cargo.toml
- Add --wasm-split flag to dx build in Makefile
- Router definitions stay as plain #[route] — splitting is automatic

Dioxus 0.7.9 handles splitting automatically when the feature and
CLI flag are enabled. Per-route #[wasm_split] attributes are not
required (and not supported by this version's derive macro).

Cargo.lock

@@ -69,6 +69,12 @@ version = "0.13.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3df27b8d5ddb458c5fb1bbc1ce172d4a38c614a97d550b0ac89003897fb01de4"
 
+[[package]]
+name = "async-once-cell"
+version = "0.5.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4288f83726785267c6f2ef073a3d83dc3f9b81464e9f99898240cced85fce35a"
+
 [[package]]
 name = "async-stream"
 version = "0.3.6"
@@ -849,6 +855,7 @@ dependencies = [
  "serde",
  "subsecond",
  "warnings",
+ "wasm-splitter",
 ]
 
 [[package]]
@@ -4489,6 +4496,30 @@ dependencies = [
  "wasmparser",
 ]
 
+[[package]]
+name = "wasm-split-macro"
+version = "0.7.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "540776437e21577983e166d89a0c65f355c0409a20e27ca79f72798d7192f0a3"
+dependencies = [
+ "base16",
+ "digest 0.10.7",
+ "proc-macro2",
+ "quote",
+ "sha2 0.10.9",
+ "syn",
+]
+
+[[package]]
+name = "wasm-splitter"
+version = "0.7.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e70a57a19a59bd771cd2db8320d6a65de1763995e9fbdc0d1508301138526231"
+dependencies = [
+ "async-once-cell",
+ "wasm-split-macro",
+]
+
 [[package]]
 name = "wasm-streams"
 version = "0.4.2"
@@ -5011,6 +5042,7 @@ dependencies = [
  "chrono",
  "deadpool-postgres",
  "dioxus",
+ "dioxus-router",
  "dotenvy",
  "getrandom 0.2.17",
  "http",

Cargo.toml

@@ -4,7 +4,8 @@ version = "0.1.0"
 edition = "2021"
 
 [dependencies]
-dioxus = { version = "0.7.9", features = ["fullstack", "router"] }
+dioxus = { version = "0.7.9", features = ["fullstack", "router", "wasm-split"] }
+dioxus-router = { version = "0.7.9", features = ["wasm-split"] }
 serde = { version = "1.0", features = ["derive"] }
 tokio = { version = "1.52", features = ["full"], optional = true }
 tokio-postgres = { version = "0.7", features = ["with-chrono-0_4"], optional = true }

Makefile

@@ -4,7 +4,7 @@ build:
 	@$(MAKE) build-editor
 	@$(MAKE) highlight-css
 	@tailwindcss -i input.css -o public/style.css --minify
-	@dx build --release
+	@dx build --release --wasm-split
 	@echo "Fixing WASM paths for production..."
 	@python3 scripts/fix-wasm-paths.py
 	@echo "WASM paths fixed."

src/router.rs

@@ -23,34 +23,34 @@ pub enum Route {
         Home {},
         #[route("/page/:page")]
         HomePage { page: i32 },
-        #[route("/archives", wasm_split)]
+        #[route("/archives")]
         Archives {},
-        #[route("/tags", wasm_split)]
+        #[route("/tags")]
         Tags {},
-        #[route("/tags/:tag", wasm_split)]
+        #[route("/tags/:tag")]
         TagDetail { tag: String },
         #[route("/post/:slug")]
         PostDetail { slug: String },
-        #[route("/search", wasm_split)]
+        #[route("/search")]
         Search {},
-        #[route("/about", wasm_split)]
+        #[route("/about")]
         About {},
     #[end_layout]
 
     #[nest("/admin")]
     #[layout(AdminLayout)]
-        #[route("/", wasm_split)]
+        #[route("/")]
         Admin {},
-        #[route("/write", wasm_split)]
+        #[route("/write")]
         Write {},
-        #[route("/posts", wasm_split)]
+        #[route("/posts")]
         Posts {},
     #[end_layout]
     #[end_nest]
 
-    #[route("/login", wasm_split)]
+    #[route("/login")]
     Login {},
-    #[route("/register", wasm_split)]
+    #[route("/register")]
     Register {},
 }