Add syntax highlighting, OSD, search, perf optimizations, and UX improvements

- troika-three-text MSDF rendering for resolution-independent code text
- highlight.js syntax highlighting with Catppuccin Mocha colors
- Lazy text pool: max 25 concurrent code meshes, created on demand
- LOD throttled to every 3 frames, OSD every 10
- 45° tiled watermark (repo/path/filename) behind code
- OSD: breadcrumb, file stats, zoom level
- Search: / or Ctrl+F to find and fly to files
- Keybindings: WASD pan, Q/E rotate, Z/C zoom, Space overview, ? help modal
- Mouse wheel zoom vs trackpad pan detection via event frequency
- Zip GBK filename encoding fallback for Chinese filenames
- Docker volume persistence for SQLite cache

server/Cargo.lock

@@ -900,6 +900,7 @@ name = "repo-vis-server"
 version = "0.1.0"
 dependencies = [
  "axum",
+ "encoding_rs",
  "hex",
  "rusqlite",
  "serde",

server/Cargo.toml

@@ -14,6 +14,7 @@ walkdir = "2"
 sha2 = "0.10"
 hex = "0.4"
 zip = "2"
+encoding_rs = "0.8"
 tempfile = "3"
 tracing = "0.1"
 tracing-subscriber = "0.3"

server/src/main.rs

@@ -183,9 +183,40 @@ async fn scan_zip(
     let mut archive =
         zip::ZipArchive::new(cursor).map_err(|e| (StatusCode::BAD_REQUEST, format!("Invalid zip: {e}")))?;
 
-    archive
-        .extract(tmp.path())
-        .map_err(|e| (StatusCode::INTERNAL_SERVER_ERROR, format!("Extract failed: {e}")))?;
+    // Extract manually to handle non-UTF-8 filenames (GBK from Windows zips)
+    for i in 0..archive.len() {
+        let mut file = archive
+            .by_index_raw(i)
+            .map_err(|e| (StatusCode::INTERNAL_SERVER_ERROR, format!("Zip entry error: {e}")))?;
+
+        let raw_name = file.name_raw();
+        // Try UTF-8 first, then GBK fallback
+        let name = match std::str::from_utf8(raw_name) {
+            Ok(s) => s.to_string(),
+            Err(_) => {
+                let (decoded, _, _) = encoding_rs::GBK.decode(raw_name);
+                decoded.into_owned()
+            }
+        };
+
+        // Sanitize: skip entries that try to escape
+        if name.contains("..") {
+            continue;
+        }
+
+        let out_path = tmp.path().join(&name);
+        if file.is_dir() {
+            std::fs::create_dir_all(&out_path).ok();
+        } else {
+            if let Some(parent) = out_path.parent() {
+                std::fs::create_dir_all(parent).ok();
+            }
+            let mut outfile = std::fs::File::create(&out_path)
+                .map_err(|e| (StatusCode::INTERNAL_SERVER_ERROR, format!("Create file: {e}")))?;
+            std::io::copy(&mut file, &mut outfile)
+                .map_err(|e| (StatusCode::INTERNAL_SERVER_ERROR, format!("Write file: {e}")))?;
+        }
+    }
 
     let entries: Vec<_> = std::fs::read_dir(tmp.path())
         .map_err(|e| (StatusCode::INTERNAL_SERVER_ERROR, e.to_string()))?