refactor(extensions): move windows-thumbnail to extensions (#2562)

apps/readest-app/extensions/windows-thumbnail/Cargo.toml

@@ -8,7 +8,7 @@ publish = false
 
 [lib]
 name = "windows_thumbnail"
-path = "mod.rs"
+path = "src/mod.rs"
 crate-type = ["cdylib"]
 
 [dependencies]

apps/readest-app/extensions/windows-thumbnail/src/extraction.rs

@@ -434,7 +434,7 @@ pub fn create_thumbnail_with_overlay(cover_bytes: &[u8], requested_size: u32) ->
 /// Load the Readest overlay icon.
 fn load_overlay_icon() -> Option<DynamicImage> {
     // Try embedded icon
-    let icon_bytes = include_bytes!("../../../../public/icon.png");
+    let icon_bytes = include_bytes!("../../../public/icon.png");
     if let Ok(img) = image::load_from_memory(icon_bytes) {
         return Some(img);
     }

apps/readest-app/src-tauri/build.rs

@@ -1,7 +1,7 @@
 use std::{env, fs, path::PathBuf, process::Command};
 
 fn main() {
-    println!("cargo:rerun-if-changed=src/windows/thumbnail");
+    println!("cargo:rerun-if-changed=../extensions/windows-thumbnail/src");
     let target_os = env::var("CARGO_CFG_TARGET_OS").unwrap_or_default();
     if target_os == "windows" {
         build_windows_thumbnail();
@@ -12,7 +12,10 @@ fn main() {
 
 fn build_windows_thumbnail() {
     let manifest_dir = PathBuf::from(env::var("CARGO_MANIFEST_DIR").unwrap());
-    let dll_crate_dir = manifest_dir.join("src/windows/thumbnail");
+    let dll_crate_dir = manifest_dir
+        .join("..")
+        .join("extensions")
+        .join("windows-thumbnail");
     let dll_crate_manifest = dll_crate_dir.join("Cargo.toml");
     let profile = env::var("PROFILE").unwrap_or_else(|_| "debug".into());