From 955eab8d73a9216e56c1b510cf02305f6a68b22b Mon Sep 17 00:00:00 2001
From: QuartzLibrary <81446760+QuartzLibrary@users.noreply.github.com>
Date: Sat, 11 Jul 2026 17:36:27 +0100
Subject: [PATCH 1/7] Split `cli` module

---
 src/{main.rs => cli.rs} | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)
 rename src/{main.rs => cli.rs} (99%)

diff --git a/src/main.rs b/src/cli.rs
similarity index 99%
rename from src/main.rs
rename to src/cli.rs
index aa0883c..9d628ff 100644
--- a/src/main.rs
+++ b/src/cli.rs
@@ -152,8 +152,7 @@ impl Display for OutputFormat {
     }
 }
 
-#[tokio::main]
-async fn main() {
+pub async fn main() {
     simple_logger::init_with_level(log::Level::Info).unwrap();
 
     let command = Command::parse();

From ab665f0d7759581e717447ad60df17208f615e6d Mon Sep 17 00:00:00 2001
From: QuartzLibrary <81446760+QuartzLibrary@users.noreply.github.com>
Date: Sat, 11 Jul 2026 17:38:31 +0100
Subject: [PATCH 2/7] Create main.rs

---
 src/main.rs | 13 +++++++++++++
 1 file changed, 13 insertions(+)
 create mode 100644 src/main.rs

diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..34aedbd
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,13 @@
+#[cfg(not(target_arch = "wasm32"))]
+mod cli;
+
+#[cfg(not(target_arch = "wasm32"))]
+#[tokio::main]
+async fn main() {
+    cli::main().await;
+}
+
+#[cfg(target_arch = "wasm32")]
+fn main() {
+    println!("Not implemented for wasm32");
+}

From c2dd0571f87fcb84584498eb8755316bd9dabdbf Mon Sep 17 00:00:00 2001
From: QuartzLibrary <81446760+QuartzLibrary@users.noreply.github.com>
Date: Sat, 11 Jul 2026 16:29:54 +0100
Subject: [PATCH 3/7] Build on `wasm`

---
 .cargo/config.toml |   5 +
 Cargo.lock         | 717 ++++++++++++++++++++++++++++++++++++++++++---
 Cargo.toml         |  14 +-
 src/api/mod.rs     |   6 +-
 4 files changed, 694 insertions(+), 48 deletions(-)
 create mode 100644 .cargo/config.toml

diff --git a/.cargo/config.toml b/.cargo/config.toml
new file mode 100644
index 0000000..d530c0b
--- /dev/null
+++ b/.cargo/config.toml
@@ -0,0 +1,5 @@
+[profile.rust-analyzer]
+inherits = "dev"
+
+[target.wasm32-unknown-unknown]
+rustflags = ['--cfg', 'getrandom_backend="wasm_js"']
diff --git a/Cargo.lock b/Cargo.lock
index 6e002b4..adff034 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -182,6 +182,15 @@ dependencies = [
  "simd-abstraction",
 ]
 
+[[package]]
+name = "basic-toml"
+version = "0.1.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ba62675e8242a4c4e806d12f11d136e626e6c8361d6b829310732241652a178a"
+dependencies = [
+ "serde",
+]
+
 [[package]]
 name = "bitflags"
 version = "1.3.2"
@@ -215,6 +224,15 @@ dependencies = [
  "generic-array",
 ]
 
+[[package]]
+name = "bs58"
+version = "0.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bf88ba1141d185c399bee5288d850d63b8369520c1eafc32a0430b5b6c287bf4"
+dependencies = [
+ "tinyvec",
+]
+
 [[package]]
 name = "bumpalo"
 version = "3.17.0"
@@ -282,6 +300,27 @@ version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
+[[package]]
+name = "chacha20"
+version = "0.10.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d524456ba66e72eb8b115ff89e01e497f8e6d11d78b70b1aa13c0fbd97540a81"
+dependencies = [
+ "cfg-if",
+ "cpufeatures 0.3.0",
+ "rand_core 0.10.1",
+]
+
+[[package]]
+name = "charset"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f1f927b07c74ba84c7e5fe4db2baeb3e996ab2688992e39ac68ce3220a677c7e"
+dependencies = [
+ "base64",
+ "encoding_rs",
+]
+
 [[package]]
 name = "chrono"
 version = "0.4.40"
@@ -379,6 +418,15 @@ dependencies = [
  "syn 1.0.109",
 ]
 
+[[package]]
+name = "content_disposition"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ebc14a88e1463ddd193906285abe5c360c7e8564e05ccc5d501755f7fbc9ca9c"
+dependencies = [
+ "charset",
+]
+
 [[package]]
 name = "convert_case"
 version = "0.4.0"
@@ -419,6 +467,15 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "cpufeatures"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8b2a41393f66f16b0823bb79094d54ac5fbd34ab292ddafb9a0456ac9f87d201"
+dependencies = [
+ "libc",
+]
+
 [[package]]
 name = "crc32fast"
 version = "1.4.2"
@@ -512,6 +569,75 @@ dependencies = [
  "syn 2.0.98",
 ]
 
+[[package]]
+name = "darling"
+version = "0.20.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fc7f46116c46ff9ab3eb1597a45688b6715c6e628b5c133e288e709a29bcb4ee"
+dependencies = [
+ "darling_core 0.20.11",
+ "darling_macro 0.20.11",
+]
+
+[[package]]
+name = "darling"
+version = "0.23.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "25ae13da2f202d56bd7f91c25fba009e7717a1e4a1cc98a76d844b65ae912e9d"
+dependencies = [
+ "darling_core 0.23.0",
+ "darling_macro 0.23.0",
+]
+
+[[package]]
+name = "darling_core"
+version = "0.20.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0d00b9596d185e565c2207a0b01f8bd1a135483d02d9b7b0a54b11da8d53412e"
+dependencies = [
+ "fnv",
+ "ident_case",
+ "proc-macro2",
+ "quote",
+ "strsim",
+ "syn 2.0.98",
+]
+
+[[package]]
+name = "darling_core"
+version = "0.23.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9865a50f7c335f53564bb694ef660825eb8610e0a53d3e11bf1b0d3df31e03b0"
+dependencies = [
+ "ident_case",
+ "proc-macro2",
+ "quote",
+ "strsim",
+ "syn 2.0.98",
+]
+
+[[package]]
+name = "darling_macro"
+version = "0.20.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fc34b93ccb385b40dc71c6fceac4b2ad23662c7eeb248cf10d529b7e055b6ead"
+dependencies = [
+ "darling_core 0.20.11",
+ "quote",
+ "syn 2.0.98",
+]
+
+[[package]]
+name = "darling_macro"
+version = "0.23.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ac3984ec7bd6cfa798e62b4a642426a5be0e68f9401cfc2a01e3fa9ea2fcdb8d"
+dependencies = [
+ "darling_core 0.23.0",
+ "quote",
+ "syn 2.0.98",
+]
+
 [[package]]
 name = "dashmap"
 version = "5.5.3"
@@ -548,11 +674,11 @@ checksum = "5c297a1c74b71ae29df00c3e22dd9534821d60eb9af5a0192823fa2acea70c2a"
 
 [[package]]
 name = "deranged"
-version = "0.3.11"
+version = "0.5.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b42b6fa04a440b495c8b04d0e71b707c585f83cb9cb28cf8cd0d976c315e31b4"
+checksum = "7cd812cc2bc1d69d4764bd80df88b4317eaef9e773c75226407d9bc0876b211c"
 dependencies = [
- "powerfmt",
+ "serde_core",
 ]
 
 [[package]]
@@ -610,6 +736,12 @@ dependencies = [
  "dtoa",
 ]
 
+[[package]]
+name = "dyn-clone"
+version = "1.0.20"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d0881ea181b1df73ff77ffaaf9c7544ecc11e82fba9b5f27b262a3c73a332555"
+
 [[package]]
 name = "either"
 version = "1.14.0"
@@ -647,6 +779,17 @@ version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "877a4ace8713b0bcf2a4e7eec82529c029f1d0619886d18145fea96c3ffe5c0f"
 
+[[package]]
+name = "erased-serde"
+version = "0.4.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d2add8a07dd6a8d93ff627029c51de145e12686fbc36ecb298ac22e74cf02dec"
+dependencies = [
+ "serde",
+ "serde_core",
+ "typeid",
+]
+
 [[package]]
 name = "errno"
 version = "0.3.10"
@@ -767,43 +910,92 @@ dependencies = [
  "new_debug_unreachable",
 ]
 
+[[package]]
+name = "futures"
+version = "0.3.32"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8b147ee9d1f6d097cef9ce628cd2ee62288d963e16fb287bd9286455b241382d"
+dependencies = [
+ "futures-channel",
+ "futures-core",
+ "futures-executor",
+ "futures-io",
+ "futures-sink",
+ "futures-task",
+ "futures-util",
+]
+
 [[package]]
 name = "futures-channel"
-version = "0.3.31"
+version = "0.3.32"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2dff15bf788c671c1934e366d07e30c1814a8ef514e1af724a602e8a2fbe1b10"
+checksum = "07bbe89c50d7a535e539b8c17bc0b49bdb77747034daa8087407d655f3f7cc1d"
 dependencies = [
  "futures-core",
+ "futures-sink",
 ]
 
 [[package]]
 name = "futures-core"
-version = "0.3.31"
+version = "0.3.32"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "05f29059c0c2090612e8d742178b0580d2dc940c837851ad723096f87af6663e"
+checksum = "7e3450815272ef58cec6d564423f6e755e25379b217b0bc688e295ba24df6b1d"
+
+[[package]]
+name = "futures-executor"
+version = "0.3.32"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "baf29c38818342a3b26b5b923639e7b1f4a61fc5e76102d4b1981c6dc7a7579d"
+dependencies = [
+ "futures-core",
+ "futures-task",
+ "futures-util",
+]
+
+[[package]]
+name = "futures-io"
+version = "0.3.32"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cecba35d7ad927e23624b22ad55235f2239cfa44fd10428eecbeba6d6a717718"
+
+[[package]]
+name = "futures-macro"
+version = "0.3.32"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e835b70203e41293343137df5c0664546da5745f82ec9b84d40be8336958447b"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.98",
+]
 
 [[package]]
 name = "futures-sink"
-version = "0.3.31"
+version = "0.3.32"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e575fab7d1e0dcb8d0c7bcf9a63ee213816ab51902e6d244a95819acacf1d4f7"
+checksum = "c39754e157331b013978ec91992bde1ac089843443c49cbc7f46150b0fad0893"
 
 [[package]]
 name = "futures-task"
-version = "0.3.31"
+version = "0.3.32"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f90f7dce0722e95104fcb095585910c0977252f286e354b5e3bd38902cd99988"
+checksum = "037711b3d59c33004d3856fbdc83b99d4ff37a24768fa1be9ce3538a1cde4393"
 
 [[package]]
 name = "futures-util"
-version = "0.3.31"
+version = "0.3.32"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9fa08315bb612088cc391249efdc3bc77536f16c91f6cf495e6fbe85b20a4a81"
+checksum = "389ca41296e6190b48053de0321d02a77f32f8a5d2461dd38762c0593805c6d6"
 dependencies = [
+ "futures-channel",
  "futures-core",
+ "futures-io",
+ "futures-macro",
+ "futures-sink",
  "futures-task",
+ "memchr",
  "pin-project-lite",
- "pin-utils",
+ "slab",
 ]
 
 [[package]]
@@ -843,8 +1035,10 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c4567c8db10ae91089c99af84c68c38da3ec2f087c3f82960bcdbf3656b6f4d7"
 dependencies = [
  "cfg-if",
+ "js-sys",
  "libc",
  "wasi 0.11.0+wasi-snapshot-preview1",
+ "wasm-bindgen",
 ]
 
 [[package]]
@@ -854,11 +1048,27 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "43a49c392881ce6d5c3b8cb70f98717b7c07aabbdff06687b9030dbfbe2725f8"
 dependencies = [
  "cfg-if",
+ "js-sys",
  "libc",
  "wasi 0.13.3+wasi-0.2.2",
+ "wasm-bindgen",
  "windows-targets 0.52.6",
 ]
 
+[[package]]
+name = "getrandom"
+version = "0.4.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "300e883d756b2e4ec94e02791f39b04b522276138852cfc41d9fb7e904106099"
+dependencies = [
+ "cfg-if",
+ "js-sys",
+ "libc",
+ "r-efi",
+ "rand_core 0.10.1",
+ "wasm-bindgen",
+]
+
 [[package]]
 name = "gif"
 version = "0.13.1"
@@ -881,6 +1091,18 @@ version = "0.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a8d1add55171497b4705a648c6b583acafb01d58050a51727785f0b2c8e0a2b2"
 
+[[package]]
+name = "gloo-timers"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bbb143cf96099802033e0d4f4963b19fd2e0b728bcf076cd9cf7f6634f092994"
+dependencies = [
+ "futures-channel",
+ "futures-core",
+ "js-sys",
+ "wasm-bindgen",
+]
+
 [[package]]
 name = "glowpub"
 version = "0.4.0"
@@ -891,6 +1113,9 @@ dependencies = [
  "cssparser 0.33.0",
  "epub-builder",
  "fontdb",
+ "getrandom 0.2.15",
+ "getrandom 0.3.1",
+ "getrandom 0.4.3",
  "glob",
  "html-escape",
  "html5ever",
@@ -915,6 +1140,7 @@ dependencies = [
  "tiny-skia",
  "tokio",
  "usvg",
+ "utile",
  "uuid",
  "xml5ever",
 ]
@@ -931,7 +1157,7 @@ dependencies = [
  "futures-core",
  "futures-sink",
  "http",
- "indexmap",
+ "indexmap 2.7.1",
  "slab",
  "tokio",
  "tokio-util",
@@ -974,6 +1200,12 @@ version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2304e00983f87ffb38b55b444b5e3b60a884b5d30c0fca7d82fe33449bbe55ea"
 
+[[package]]
+name = "hex"
+version = "0.4.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7f24254aa9a54b5c858eaee2f5bccdb46aaf0e486a595ed5fd8f86ba55232a70"
+
 [[package]]
 name = "html-escape"
 version = "0.2.13"
@@ -1037,6 +1269,15 @@ version = "1.10.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f2d708df4e7140240a16cd6ab0ab65c972d7433ab77819ea693fde9c43811e2a"
 
+[[package]]
+name = "humansize"
+version = "2.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6cb51c9a029ddc91b07a787f1d86b53ccfa49b0e86688c946ebe8d3555685dd7"
+dependencies = [
+ "libm",
+]
+
 [[package]]
 name = "hyper"
 version = "1.6.0"
@@ -1250,6 +1491,12 @@ dependencies = [
  "syn 2.0.98",
 ]
 
+[[package]]
+name = "ident_case"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b9e0384b61958566e926dc50660321d12159025e767c18e043daf26b70104c39"
+
 [[package]]
 name = "idna"
 version = "1.0.3"
@@ -1310,6 +1557,17 @@ version = "0.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ce23b50ad8242c51a442f3ff322d56b02f08852c77e4c0b4d3fd684abc89c683"
 
+[[package]]
+name = "indexmap"
+version = "1.9.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bd070e393353796e801d209ad339e89596eb4c8d430d18ede6a1cced8fafbd99"
+dependencies = [
+ "autocfg",
+ "hashbrown 0.12.3",
+ "serde",
+]
+
 [[package]]
 name = "indexmap"
 version = "2.7.1"
@@ -1398,6 +1656,12 @@ version = "0.2.170"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "875b3680cb2f8f71bdcf9a30f38d48282f5d3c95cbf9b3fa57269bb5d5c06828"
 
+[[package]]
+name = "libm"
+version = "0.2.16"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b6d2cec3eae94f9f509c767b45932f1ada8350c4bdb85af2fcab4a3c14807981"
+
 [[package]]
 name = "lightningcss"
 version = "1.0.0-alpha.63"
@@ -1412,7 +1676,7 @@ dependencies = [
  "dashmap",
  "data-encoding",
  "getrandom 0.2.15",
- "indexmap",
+ "indexmap 2.7.1",
  "itertools",
  "lazy_static",
  "lightningcss-derive",
@@ -1481,7 +1745,7 @@ dependencies = [
  "memchr",
  "mime",
  "selectors",
- "thiserror",
+ "thiserror 1.0.69",
 ]
 
 [[package]]
@@ -1549,6 +1813,22 @@ version = "0.3.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6877bb514081ee2a7ff5ef9de3281f14a4dd4bceac4c09388074a6b5df8a139a"
 
+[[package]]
+name = "mime_guess"
+version = "2.0.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f7c44f8e672c00fe5308fa235f821cb4198414e1c77935c1ab6948d3fd78550e"
+dependencies = [
+ "mime",
+ "unicase",
+]
+
+[[package]]
+name = "minimal-lexical"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "68354c5c6bd36d73ff3feceb05efa59b6acb7626617f4962be322a825e61f79a"
+
 [[package]]
 name = "miniz_oxide"
 version = "0.8.5"
@@ -1599,11 +1879,27 @@ version = "0.1.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "72ef4a56884ca558e5ddb05a1d1e7e1bfd9a68d9ed024c21704cc98872dae1bb"
 
+[[package]]
+name = "nohash-hasher"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2bf50223579dc7cdcfb3bfcacf7069ff68243f8c363f62ffa99cf000a6b9c451"
+
+[[package]]
+name = "nom"
+version = "7.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d273983c5a657a70a3e8f2a01329822f3b8c8172b73826411a55751e404a0a4a"
+dependencies = [
+ "memchr",
+ "minimal-lexical",
+]
+
 [[package]]
 name = "num-conv"
-version = "0.1.0"
+version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "51d515d32fb182ee37cda2ccdcb92950d6a3c2893aa280e540671c2cd0f3b1d9"
+checksum = "521739c6d2bac4aa25192232afe6841231376b2b26d4d9fae5ecf8ca5772e441"
 
 [[package]]
 name = "num-traits"
@@ -1872,16 +2168,30 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5be167a7af36ee22fe3115051bc51f6e6c7054c9348e28deb4f49bd6f705a315"
 
 [[package]]
-name = "pin-project-lite"
-version = "0.2.16"
+name = "pin-project"
+version = "1.1.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3b3cff922bd51709b605d9ead9aa71031d81447142d828eb4a6eba76fe619f9b"
+checksum = "2466b2336ed02bcdca6b294417127b90ec92038d1d5c4fbeac971a922e0e0924"
+dependencies = [
+ "pin-project-internal",
+]
 
 [[package]]
-name = "pin-utils"
-version = "0.1.0"
+name = "pin-project-internal"
+version = "1.1.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c96395f0a926bc13b1c17622aaddda1ecb55d49c8f1bf9777e4d877800a43f8b"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.98",
+]
+
+[[package]]
+name = "pin-project-lite"
+version = "0.2.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8b870d8c151b6f2fb93e84a13146138f05d02ed11c7e7c54f8826aaaf7c9f184"
+checksum = "3b3cff922bd51709b605d9ead9aa71031d81447142d828eb4a6eba76fe619f9b"
 
 [[package]]
 name = "pkg-config"
@@ -1889,6 +2199,36 @@ version = "0.3.31"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "953ec861398dccce10c670dfeaf3ec4911ca479e9c02154b3a215178c5f566f2"
 
+[[package]]
+name = "plotly"
+version = "0.12.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0746e9faf2b051db76470fd428cbc0db792db05346dedaae4a75b16d7be503b5"
+dependencies = [
+ "dyn-clone",
+ "erased-serde",
+ "once_cell",
+ "plotly_derive",
+ "rand 0.8.5",
+ "rinja",
+ "serde",
+ "serde_json",
+ "serde_repr",
+ "serde_with",
+]
+
+[[package]]
+name = "plotly_derive"
+version = "0.12.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2d683930282f098b9f524e2596e3e63483507ac499231c96127fcb166bc05d26"
+dependencies = [
+ "darling 0.20.11",
+ "proc-macro2",
+ "quote",
+ "syn 2.0.98",
+]
+
 [[package]]
 name = "png"
 version = "0.17.16"
@@ -1973,6 +2313,12 @@ dependencies = [
  "proc-macro2",
 ]
 
+[[package]]
+name = "r-efi"
+version = "6.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f8dcc9c7d52a811697d2151c701e0d08956f92b0e24136cf4cf27b57a6a0d9bf"
+
 [[package]]
 name = "radium"
 version = "0.7.0"
@@ -2004,6 +2350,17 @@ dependencies = [
  "rand_core 0.6.4",
 ]
 
+[[package]]
+name = "rand"
+version = "0.10.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c7f5fa3a058cd35567ef9bfa5e75732bee0f9e4c55fa90477bef2dfcdbc4be80"
+dependencies = [
+ "chacha20",
+ "getrandom 0.4.3",
+ "rand_core 0.10.1",
+]
+
 [[package]]
 name = "rand_chacha"
 version = "0.2.2"
@@ -2042,6 +2399,12 @@ dependencies = [
  "getrandom 0.2.15",
 ]
 
+[[package]]
+name = "rand_core"
+version = "0.10.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "63b8176103e19a2643978565ca18b50549f6101881c443590420e4dc998a3c69"
+
 [[package]]
 name = "rand_hc"
 version = "0.2.0"
@@ -2089,6 +2452,26 @@ dependencies = [
  "bitflags 2.9.0",
 ]
 
+[[package]]
+name = "ref-cast"
+version = "1.0.25"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f354300ae66f76f1c85c5f84693f0ce81d747e2c3f21a45fef496d89c960bf7d"
+dependencies = [
+ "ref-cast-impl",
+]
+
+[[package]]
+name = "ref-cast-impl"
+version = "1.0.25"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b7186006dcb21920990093f30e3dea63b7d6e977bf1256be20c3563a5db070da"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.98",
+]
+
 [[package]]
 name = "regex"
 version = "1.11.1"
@@ -2211,6 +2594,49 @@ dependencies = [
  "windows-sys 0.52.0",
 ]
 
+[[package]]
+name = "rinja"
+version = "0.3.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3dc4940d00595430b3d7d5a01f6222b5e5b51395d1120bdb28d854bb8abb17a5"
+dependencies = [
+ "humansize",
+ "itoa 1.0.14",
+ "percent-encoding",
+ "rinja_derive",
+ "serde",
+ "serde_json",
+]
+
+[[package]]
+name = "rinja_derive"
+version = "0.3.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "08d9ed0146aef6e2825f1b1515f074510549efba38d71f4554eec32eb36ba18b"
+dependencies = [
+ "basic-toml",
+ "memchr",
+ "mime",
+ "mime_guess",
+ "proc-macro2",
+ "quote",
+ "rinja_parser",
+ "rustc-hash",
+ "serde",
+ "syn 2.0.98",
+]
+
+[[package]]
+name = "rinja_parser"
+version = "0.3.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "93f9a866e2e00a7a1fb27e46e9e324a6f7c0e7edc4543cae1d38f4e4a100c610"
+dependencies = [
+ "memchr",
+ "nom",
+ "serde",
+]
+
 [[package]]
 name = "rkyv"
 version = "0.7.45"
@@ -2240,6 +2666,25 @@ dependencies = [
  "syn 1.0.109",
 ]
 
+[[package]]
+name = "rmp"
+version = "0.8.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4ba8be72d372b2c9b35542551678538b562e7cf86c3315773cae48dfbfe7790c"
+dependencies = [
+ "num-traits",
+]
+
+[[package]]
+name = "rmp-serde"
+version = "1.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "72f81bee8c8ef9b577d1681a70ebbc962c232461e397b22c208c43c04b67a155"
+dependencies = [
+ "rmp",
+ "serde",
+]
+
 [[package]]
 name = "roxmltree"
 version = "0.19.0"
@@ -2383,6 +2828,30 @@ dependencies = [
  "windows-sys 0.59.0",
 ]
 
+[[package]]
+name = "schemars"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4cd191f9397d57d581cddd31014772520aa448f65ef991055d7f61582c65165f"
+dependencies = [
+ "dyn-clone",
+ "ref-cast",
+ "serde",
+ "serde_json",
+]
+
+[[package]]
+name = "schemars"
+version = "1.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a2b42f36aa1cd011945615b92222f6bf73c599a102a300334cd7f8dbeec726cc"
+dependencies = [
+ "dyn-clone",
+ "ref-cast",
+ "serde",
+ "serde_json",
+]
+
 [[package]]
 name = "scopeguard"
 version = "1.2.0"
@@ -2446,18 +2915,28 @@ checksum = "f79dfe2d285b0488816f30e700a7438c5a73d816b5b7d3ac72fbc48b0d185e03"
 
 [[package]]
 name = "serde"
-version = "1.0.218"
+version = "1.0.228"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9a8e94ea7f378bd32cbbd37198a4a91436180c5bb472411e48b5ec2e2124ae9e"
+dependencies = [
+ "serde_core",
+ "serde_derive",
+]
+
+[[package]]
+name = "serde_core"
+version = "1.0.228"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e8dfc9d19bdbf6d17e22319da49161d5d0108e4188e8b680aef6299eed22df60"
+checksum = "41d385c7d4ca58e59fc732af25c3983b67ac852c1a25000afe1175de458b67ad"
 dependencies = [
  "serde_derive",
 ]
 
 [[package]]
 name = "serde_derive"
-version = "1.0.218"
+version = "1.0.228"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f09503e191f4e797cb8aac08e9a4a4695c5edf6a2e70e376d961ddd5c969f82b"
+checksum = "d540f220d3187173da220f885ab66608367b6574e925011a9353e4badda91d79"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -2466,14 +2945,26 @@ dependencies = [
 
 [[package]]
 name = "serde_json"
-version = "1.0.139"
+version = "1.0.150"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "44f86c3acccc9c65b153fe1b85a3be07fe5515274ec9f0653b4a0875731c72a6"
+checksum = "e8014e44b4736ed0538adeecded0fce2a272f22dc9578a7eb6b2d9993c74cfb9"
 dependencies = [
  "itoa 1.0.14",
  "memchr",
- "ryu",
  "serde",
+ "serde_core",
+ "zmij",
+]
+
+[[package]]
+name = "serde_repr"
+version = "0.1.20"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "175ee3e80ae9982737ca543e96133087cbd9a485eecc3bc4de9c1a37b47ea59c"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.98",
 ]
 
 [[package]]
@@ -2488,6 +2979,38 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "serde_with"
+version = "3.21.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "76a5c54c7310e7b8b9577c286d7e399ddd876c3e12b3ed917a8aabc4b96e9e8c"
+dependencies = [
+ "base64",
+ "bs58",
+ "chrono",
+ "hex",
+ "indexmap 1.9.3",
+ "indexmap 2.7.1",
+ "schemars 0.9.0",
+ "schemars 1.2.1",
+ "serde_core",
+ "serde_json",
+ "serde_with_macros",
+ "time",
+]
+
+[[package]]
+name = "serde_with_macros"
+version = "3.21.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "84d57bc0c8b9a17920c178daa6bb924850d54a9c97ab45194bb8c17ad66bb660"
+dependencies = [
+ "darling 0.23.0",
+ "proc-macro2",
+ "quote",
+ "syn 2.0.98",
+]
+
 [[package]]
 name = "servo_arc"
 version = "0.1.1"
@@ -2505,7 +3028,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "793db75ad2bcafc3ffa7c68b215fee268f537982cd901d132f89c6343f3a3dc8"
 dependencies = [
  "cfg-if",
- "cpufeatures",
+ "cpufeatures 0.2.17",
  "digest",
 ]
 
@@ -2517,10 +3040,11 @@ checksum = "0fda2ff0d084019ba4d7c6f371c95d8fd75ce3524c3cb8fb653a3023f6323e64"
 
 [[package]]
 name = "signal-hook-registry"
-version = "1.4.2"
+version = "1.4.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a9e9e0b4211b72e7b8b6e85c807d36c212bdb33ea8587f7569562a84df5465b1"
+checksum = "c4db69cba1110affc0e9f7bcd48bbf87b3f4fc7c61fc9155afd4c469eb3d6c1b"
 dependencies = [
+ "errno",
  "libc",
 ]
 
@@ -2807,7 +3331,16 @@ version = "1.0.69"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b6aaf5339b578ea85b50e080feb250a3e8ae8cfcdff9a461c9ec2904bc923f52"
 dependencies = [
- "thiserror-impl",
+ "thiserror-impl 1.0.69",
+]
+
+[[package]]
+name = "thiserror"
+version = "2.0.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4288b5bcbc7920c07a1149a35cf9590a2aa808e0bc1eafaade0b80947865fbc4"
+dependencies = [
+ "thiserror-impl 2.0.18",
 ]
 
 [[package]]
@@ -2821,34 +3354,44 @@ dependencies = [
  "syn 2.0.98",
 ]
 
+[[package]]
+name = "thiserror-impl"
+version = "2.0.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ebc4ee7f67670e9b64d05fa4253e753e016c6c95ff35b89b7941d6b856dec1d5"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.98",
+]
+
 [[package]]
 name = "time"
-version = "0.3.37"
+version = "0.3.53"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "35e7868883861bd0e56d9ac6efcaaca0d6d5d82a2a7ec8209ff492c07cf37b21"
+checksum = "18dfaaeddcb932337b5e7866ee7d0ce9b76d2fd092997146f187ec09b4558a50"
 dependencies = [
  "deranged",
- "itoa 1.0.14",
  "libc",
  "num-conv",
  "num_threads",
  "powerfmt",
- "serde",
+ "serde_core",
  "time-core",
  "time-macros",
 ]
 
 [[package]]
 name = "time-core"
-version = "0.1.2"
+version = "0.1.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ef927ca75afb808a4d64dd374f00a2adf8d0fcff8e7b184af886c3c87ec4a3f3"
+checksum = "9e1c906769ad99c88eaa54e728060edef082f8e358ff32030cb7c7d315e81109"
 
 [[package]]
 name = "time-macros"
-version = "0.2.19"
+version = "0.2.31"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2834e6017e3e5e4b9834939793b282bc03b37a3336245fa820e35e233e2a85de"
+checksum = "c431b87111666e491a90baa837f914fb45cd5dc3c268591b0220ff5057f2085f"
 dependencies = [
  "num-conv",
  "time-core",
@@ -2962,6 +3505,7 @@ checksum = "d7fcaa8d55a2bdd6b83ace262b016eca0d79ee02818c5c1bcdf0305114081078"
 dependencies = [
  "bytes",
  "futures-core",
+ "futures-io",
  "futures-sink",
  "pin-project-lite",
  "tokio",
@@ -3001,9 +3545,21 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "784e0ac535deb450455cbfa28a6f0df145ea1bb7ae51b821cf5e7927fdcfbdd0"
 dependencies = [
  "pin-project-lite",
+ "tracing-attributes",
  "tracing-core",
 ]
 
+[[package]]
+name = "tracing-attributes"
+version = "0.1.31"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7490cfa5ec963746568740651ac6781f701c9c5ea257c58e057f3ba8cf69e8da"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.98",
+]
+
 [[package]]
 name = "tracing-core"
 version = "0.1.33"
@@ -3025,12 +3581,24 @@ version = "0.20.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "17f77d76d837a7830fe1d4f12b7b4ba4192c1888001c7164257e4bc6d21d96b4"
 
+[[package]]
+name = "typeid"
+version = "1.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bc7d623258602320d5c55d1bc22793b57daff0ec7efc270ea7d55ce1d5f5471c"
+
 [[package]]
 name = "typenum"
 version = "1.18.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1dccffe3ce07af9386bfd29e80c0ab1a8205a2fc34e4bcd40364df902cfa8f3f"
 
+[[package]]
+name = "unicase"
+version = "2.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dbc4bc3a9f746d862c45cb89d705aa10f187bb96c76001afab07a0d35ce60142"
+
 [[package]]
 name = "unicode-bidi"
 version = "0.3.18"
@@ -3117,6 +3685,7 @@ dependencies = [
  "form_urlencoded",
  "idna",
  "percent-encoding",
+ "serde",
 ]
 
 [[package]]
@@ -3176,6 +3745,40 @@ version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "06abde3611657adf66d383f00b093d7faecc7fa57071cce2578660c9f1010821"
 
+[[package]]
+name = "utile"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "956aef103e8b83bc3b0a9732ca55c37b3e3de5d2a71c5640f86b2b0e162654ea"
+dependencies = [
+ "ahash 0.8.11",
+ "bytes",
+ "content_disposition",
+ "futures",
+ "getrandom 0.2.15",
+ "getrandom 0.3.1",
+ "getrandom 0.4.3",
+ "gloo-timers",
+ "log",
+ "nohash-hasher",
+ "pin-project",
+ "plotly",
+ "rand 0.10.2",
+ "regex",
+ "reqwest",
+ "rmp-serde",
+ "serde",
+ "serde_json",
+ "serde_with",
+ "thiserror 2.0.18",
+ "tokio",
+ "tokio-util",
+ "tracing",
+ "url",
+ "wasm-bindgen-futures",
+ "web-time",
+]
+
 [[package]]
 name = "uuid"
 version = "1.15.1"
@@ -3183,6 +3786,16 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e0f540e3240398cce6128b64ba83fdbdd86129c16a3aa1a3a252efd66eb3d587"
 dependencies = [
  "getrandom 0.3.1",
+ "uuid-rng-internal",
+]
+
+[[package]]
+name = "uuid-rng-internal"
+version = "1.23.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "13ab16e069e7562ecbdfa2e7858097deff01e13284d62921b6db087d0d66dd76"
+dependencies = [
+ "getrandom 0.4.3",
 ]
 
 [[package]]
@@ -3314,6 +3927,16 @@ dependencies = [
  "wasm-bindgen",
 ]
 
+[[package]]
+name = "web-time"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5a6580f308b1fad9207618087a65c04e7a10bc77e02c8e84e9b00dd4b12fa0bb"
+dependencies = [
+ "js-sys",
+ "wasm-bindgen",
+]
+
 [[package]]
 name = "weezl"
 version = "0.1.8"
@@ -3666,6 +4289,12 @@ dependencies = [
  "flate2",
 ]
 
+[[package]]
+name = "zmij"
+version = "1.0.21"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b8848ee67ecc8aedbaf3e4122217aff892639231befc6a1b58d29fff4c2cabaa"
+
 [[package]]
 name = "zune-core"
 version = "0.4.12"
diff --git a/Cargo.toml b/Cargo.toml
index dc51f98..9a46c76 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -16,12 +16,12 @@ mime = "0.3"
 rand = "0.8"
 regex = "1"
 sha2 = "0.10"
+utile = "0.1"
 uuid = { version = "1", features = ["v4"] }
 
 reqwest = { version = "0.12", features = ["json"] }
 serde = { version = "1", features = ["derive"] }
 serde_json = "1"
-tokio = { version = "1", features = ["full"] }
 
 fontdb = "0.16"
 resvg = "0.41"
@@ -47,3 +47,15 @@ clap = { version = "4", features = ["derive"] }
 simple_logger = "4"
 slug = "0.1"
 rpassword = "7.3.1"
+
+[target.'cfg(not(target_arch = "wasm32"))'.dependencies]
+tokio = { version = "1", features = ["macros", "rt-multi-thread"] }
+
+[target.'cfg(target_arch = "wasm32")'.dependencies]
+_getrandom4 = { version = "0.4", features = ["wasm_js"], package = "getrandom" }
+_getrandom3 = { version = "0.3", features = ["wasm_js"], package = "getrandom" }
+_getrandom2 = { version = "0.2", features = ["js"], package = "getrandom" }
+uuid = { version = "1", features = ["rng-getrandom"] }
+
+[dev-dependencies]
+tokio = { version = "1", features = ["full"] }
diff --git a/src/api/mod.rs b/src/api/mod.rs
index 66b663b..c29dfb6 100644
--- a/src/api/mod.rs
+++ b/src/api/mod.rs
@@ -76,7 +76,7 @@ impl Replies {
                 Err(errors) => return Ok(Err(errors)),
             }
 
-            tokio::time::sleep(Duration::from_millis(100)).await;
+            utile::time::sleep(Duration::from_millis(100)).await;
         }
 
         Ok(Ok(replies))
@@ -137,7 +137,7 @@ impl BoardPosts {
                 Err(errors) => return Ok(Err(errors)),
             }
 
-            tokio::time::sleep(Duration::from_millis(100)).await;
+            utile::time::sleep(Duration::from_millis(100)).await;
         }
 
         Ok(Ok(posts))
@@ -240,7 +240,7 @@ where
                 if delay > Duration::from_secs(1) || i + 1 == retries {
                     log::info!("Api error, retrying in {delay:?}. {e:?}");
                 }
-                tokio::time::sleep(delay).await;
+                utile::time::sleep(delay).await;
             }
         }
     }

From b8999127cc6d680fef5619c055aca5be8b86e65f Mon Sep 17 00:00:00 2001
From: QuartzLibrary <81446760+QuartzLibrary@users.noreply.github.com>
Date: Sat, 11 Jul 2026 17:39:37 +0100
Subject: [PATCH 4/7] Enable `wasm` CI

---
 .github/workflows/check.yml | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
index 49648e7..6b4c8f4 100644
--- a/.github/workflows/check.yml
+++ b/.github/workflows/check.yml
@@ -31,15 +31,15 @@ jobs:
             target/
           key: ${{ runner.os }}-cargo-clippy-${{ hashFiles('**/Cargo.lock') }}
 
-      # - name: Install WASM toolchain
-      #   run: rustup target add wasm32-unknown-unknown
+      - name: Install WASM toolchain
+        run: rustup target add wasm32-unknown-unknown
 
       - name: Check project
         run: cargo clippy --workspace --all-targets --all-features -- -D warnings
 
-      # - name: Check project (WASM)
-      #   # Note lack of --all-targets here because tests and examples are not wasm compatible
-      #   run: cargo clippy --workspace --all-features --target wasm32-unknown-unknown -- -D warnings
+      - name: Check project (WASM)
+        # Note lack of --all-targets here because tests and examples are not wasm compatible
+        run: cargo clippy --workspace --all-features --target wasm32-unknown-unknown -- -D warnings
 
   test:
     runs-on: ubuntu-latest

From cbd91f84a6e381f7205100913f5689dfc8a9e476 Mon Sep 17 00:00:00 2001
From: QuartzLibrary <81446760+QuartzLibrary@users.noreply.github.com>
Date: Sat, 11 Jul 2026 18:04:12 +0100
Subject: [PATCH 5/7] Bypass cache on `wasm`

---
 src/cached.rs | 25 +++++++++++++++----------
 1 file changed, 15 insertions(+), 10 deletions(-)

diff --git a/src/cached.rs b/src/cached.rs
index 1736171..cfe9c16 100644
--- a/src/cached.rs
+++ b/src/cached.rs
@@ -70,8 +70,7 @@ impl Replies {
 
         let response = Self::get_all(id).await?;
 
-        std::fs::create_dir_all(cache_path.parent().unwrap()).unwrap();
-        write_if_changed(&cache_path, serde_json::to_vec_pretty(&response).unwrap()).unwrap();
+        cache_store(&cache_path, serde_json::to_vec_pretty(&response).unwrap());
 
         Ok(response)
     }
@@ -101,8 +100,7 @@ impl BoardPosts {
 
         let response = Self::get_all(id).await?;
 
-        std::fs::create_dir_all(cache_path.parent().unwrap()).unwrap();
-        write_if_changed(&cache_path, serde_json::to_vec_pretty(&response).unwrap()).unwrap();
+        cache_store(&cache_path, serde_json::to_vec_pretty(&response).unwrap());
 
         Ok(response)
     }
@@ -139,8 +137,7 @@ impl Icon {
         let extension = mime_to_image_extension(&mime).ok_or(format!("Invalid mime: {mime}"))?;
 
         let cache_path = Self::cache_key(*id, &extension);
-        std::fs::create_dir_all(cache_path.parent().unwrap()).unwrap();
-        write_if_changed(cache_path, &data).unwrap();
+        cache_store(cache_path, &data);
 
         Ok((mime, data))
     }
@@ -247,8 +244,7 @@ pub async fn download_cached_image(
     let extension = mime_to_image_extension(&mime).ok_or(format!("Invalid mime: {mime}"))?;
 
     let cache_path = image_cache_key(&hash, &extension);
-    std::fs::create_dir_all(cache_path.parent().unwrap()).unwrap();
-    write_if_changed(cache_path, &data).unwrap();
+    cache_store(cache_path, &data);
 
     Ok((mime, data))
 }
@@ -271,8 +267,7 @@ where
     }
     let response = crate::api::get_glowfic(url).await?;
 
-    std::fs::create_dir_all(cache_path.parent().unwrap()).unwrap();
-    write_if_changed(cache_path, serde_json::to_vec_pretty(&response).unwrap()).unwrap();
+    cache_store(cache_path, serde_json::to_vec_pretty(&response).unwrap());
 
     Ok(response)
 }
@@ -323,6 +318,16 @@ fn read_image_file(path: PathBuf) -> Result<(Mime, Vec<u8>), Box<dyn Error>> {
     }
 }
 
+fn cache_store(path: impl AsRef<Path>, contents: impl AsRef<[u8]>) {
+    if cfg!(target_arch = "wasm32") {
+        // TODO: Implement cache storage for wasm32?
+        return;
+    }
+    let path = path.as_ref();
+    std::fs::create_dir_all(path.parent().unwrap()).unwrap();
+    write_if_changed(path, contents).unwrap();
+}
+
 /// Avoids updating the last-modified date of the file.
 pub fn write_if_changed(path: impl AsRef<Path>, contents: impl AsRef<[u8]>) -> std::io::Result<()> {
     match std::fs::read(path.as_ref()) {

From 3c41f0f6874d64adff65d672cddf467f76d52a24 Mon Sep 17 00:00:00 2001
From: QuartzLibrary <81446760+QuartzLibrary@users.noreply.github.com>
Date: Sat, 11 Jul 2026 19:00:03 +0100
Subject: [PATCH 6/7] Allow generation without fetching

---
 src/generate/epub.rs | 19 +++++++++++++++++--
 1 file changed, 17 insertions(+), 2 deletions(-)

diff --git a/src/generate/epub.rs b/src/generate/epub.rs
index 2b2f860..84a2c4b 100644
--- a/src/generate/epub.rs
+++ b/src/generate/epub.rs
@@ -10,6 +10,7 @@ use uuid::Uuid;
 
 use crate::{
     Board, Post, Reply, Thread,
+    intern_images::InternedImage,
     types::{Continuity, Section, User},
 };
 
@@ -19,8 +20,15 @@ use super::{
 
 impl Continuity {
     pub async fn to_epub(&self, options: Options) -> Result<Vec<u8>, Box<dyn Error>> {
-        let mut images_to_intern = self.images_to_intern().await?;
+        let images_to_intern = self.images_to_intern().await?;
+        self.to_epub_from_images(options, images_to_intern)
+    }
 
+    pub fn to_epub_from_images(
+        &self,
+        options: Options,
+        mut images_to_intern: HashMap<String, InternedImage>,
+    ) -> Result<Vec<u8>, Box<dyn Error>> {
         if let Some(size) = options.resize_icons {
             images_to_intern = images_to_intern
                 .into_iter()
@@ -383,8 +391,15 @@ impl Thread {
 
 impl Thread {
     pub async fn to_epub(&self, options: Options) -> Result<Vec<u8>, Box<dyn Error>> {
-        let mut images_to_intern = self.images_to_intern().await?;
+        let images_to_intern = self.images_to_intern().await?;
+        self.to_epub_from_images(options, images_to_intern)
+    }
 
+    pub fn to_epub_from_images(
+        &self,
+        options: Options,
+        mut images_to_intern: HashMap<String, InternedImage>,
+    ) -> Result<Vec<u8>, Box<dyn Error>> {
         if let Some(size) = options.resize_icons {
             images_to_intern = images_to_intern
                 .into_iter()

From d37d16885c64e7a2f3dc4b1b0dd868a8d48b1bd7 Mon Sep 17 00:00:00 2001
From: QuartzLibrary <81446760+QuartzLibrary@users.noreply.github.com>
Date: Sat, 11 Jul 2026 19:21:08 +0100
Subject: [PATCH 7/7] Avoid potential panic

---
 src/cached.rs | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/src/cached.rs b/src/cached.rs
index cfe9c16..af01a94 100644
--- a/src/cached.rs
+++ b/src/cached.rs
@@ -275,8 +275,16 @@ where
 pub async fn download_image(url: &str) -> Result<(Mime, Vec<u8>), reqwest::Error> {
     let response = http_client().get(url).send().await?;
 
-    let content_type = response.headers().get(CONTENT_TYPE).unwrap();
-    let mime = Mime::from_str(content_type.to_str().unwrap()).unwrap();
+    let headers = response.headers();
+    let mime = headers
+        .get(CONTENT_TYPE)
+        .and_then(|v| v.to_str().ok())
+        .and_then(|s| Mime::from_str(s).ok())
+        .or_else(|| {
+            utile::io::get_filename_from_headers(headers)
+                .and_then(|filename| extension_to_image_mime(filename.split('.').next_back()?))
+        })
+        .unwrap_or(mime::APPLICATION_OCTET_STREAM);
 
     let data = response.bytes().await?;