feat(website/sandbox): add Run panel

Signed-off-by: Roman Volosatovs <rvolosatovs@riseup.net>

Author: rvolosatovs

.cargo/config.toml

@@ -1,5 +1,12 @@
 [target.wasm32-unknown-unknown]
 rustflags = [
+    # Emit Wasm imports for the JS-provided host functions the sandbox declares
+    # in `extern` blocks (`read_input`, `set_*`, …). These are resolved by the
+    # host at instantiation, never at link time; without this, `rust-lld` (since
+    # the 1.96 toolchain) rejects them as undefined symbols instead of importing
+    # them. Harmless for the wasm-bindgen-based `language-server-web`, which has
+    # no such raw imports.
+    "-Clink-arg=--import-undefined",
     # This adds __indirect_function_table to the exports which is needed for
     # the host to be able to call function pointers directly.
     "-Clink-arg=--export-table",

Cargo.lock

@@ -12,12 +12,22 @@ test = false
 crate-type = ["cdylib"]
 
 [dependencies]
+anyhow = "1.0.102"
 log = "0.4.28"
 miette.workspace = true
 serde.workspace = true
 serde_cbor = "0.11.2"
+serde_json.workspace = true
+sha2 = "0.10.9"
 starstream-compiler.workspace = true
 starstream-to-wasm.workspace = true
 termcolor = "1.4.1"
-wasmprinter = { workspace = true, features = ["component-model"] }
-wit-component.workspace = true
+starstream-runtime-next = { workspace = true, features = [
+    "wasmtime-custom-virtual-memory",
+] }
+wasmtime = { git = "https://github.com/bytecodealliance/wasmtime", branch = "release-46.0.0", default-features = false }
+cranelift-codegen = { git = "https://github.com/bytecodealliance/wasmtime", branch = "release-46.0.0", default-features = false }
+# wasm-tools crates kept in lockstep with wasmtime 46 (the workspace pins 0.240
+# for the wasmtime-45 crates; the sandbox needs the matching 0.251 line).
+wasmprinter = { version = "0.251.0", features = ["component-model"] }
+wit-component = "0.251.0"

starstream-sandbox-web/Cargo.toml

@@ -0,0 +1,7 @@
+fn main() {
+    // Cranelift recursion (egraph, regalloc) overflows the default 1 MiB
+    // shadow stack when compiling a component in `deploy`; give it headroom.
+    if std::env::var("CARGO_CFG_TARGET_ARCH").as_deref() == Ok("wasm32") {
+        println!("cargo::rustc-link-arg=-zstack-size=4194304");
+    }
+}