Fix base path on web and fullstack (#3247)

* Create a crate for constant serialization of config structs for manganis

* use SerializeConst for the image asset builder

* switch to a declarative macro for assets

* clean up asset macro a bit

* add serializable options for each asset type

* serialize const vec

* Add unique path formatting

* implement the new manganis macro

* optimize assets in the CLI

* Fix clippy

* Fix assets with dioxus formattable

* reduce fuzzing test limits

* use the new syntax in examples

* fix formatting

* Final doc and test pass on const-serialize

* fix avif support

* Fix manganis doc tests

* cache asset optimization

* Split out asset and bundled asset

* make hash pointer width independent

* remove const serialize cargo lock

* Fix manganis macro docs

* all tests passing

* add constvec::is_empty method to fix clippy lint

* remove nasm feature

* simplify test_rsplit_once test so typos passes

* fix range syntax for stable

* revert example change from clippy fix

* remove dioxus-static-site-generation workspace dependency

* always accept unix paths

* fix windows path seperator

* fix folder asset hash

* Optimize assets in a blocking task

* Fix asset options docs

* Document Asset and BundledAsset

* move manganis back into it's own folder

* simplify the linker macro a bit

* add more docs to AssetParser expansion

* fix manganis core doc test

* add image format helpers

* Fill in new cargo.tomls

* fix folders with explicit options

* Split by  both unix and windows path separators and take the smallest one

* fix string length

* Fix base path on web and fullstack

* Fix assets with base path

* fix fullstack base route with trailing slash

* fix clippy

packages/manganis/manganis-core/src/asset.rs

@@ -124,8 +124,23 @@ impl Asset {
             return PathBuf::from(self.bundled.absolute_source_path.as_str());
         }
 
+        #[cfg(feature = "dioxus")]
+        let bundle_root = {
+            let base_path = dioxus_cli_config::base_path();
+            let base_path = base_path
+                .as_deref()
+                .map(|base_path| {
+                    let trimmed = base_path.trim_matches('/');
+                    format!("/{trimmed}")
+                })
+                .unwrap_or_default();
+            PathBuf::from(format!("{base_path}/assets/"))
+        };
+        #[cfg(not(feature = "dioxus"))]
+        let bundle_root = PathBuf::from("/assets/");
+
         // Otherwise presumably we're bundled and we can use the bundled path
-        PathBuf::from("/assets/").join(PathBuf::from(
+        bundle_root.join(PathBuf::from(
             self.bundled.bundled_path.as_str().trim_start_matches('/'),
         ))
     }