El IDE: 10-round pass — syntax highlighting, file browser, runner, completion, split panes, find/replace, settings, minimap

Round 1: Fix dependency paths (../el/crates → ../el/engrams), verify build
Round 2: Enhanced syntax highlighting — function call detection, all El keywords (activate, sealed, parallel, deploy, etc.)
Round 3: Full El keyword set in CodeMirror tokenizer and completions; 50+ builtin function completions with type signatures
Round 4: File system integration — mkdir, rename, delete, file tree search; git status badges
Round 5: Runner integration — Ctrl+R shortcut, SSE streaming output, clickable error lines with jump-to-line
Round 6: Error highlighting with accurate line/col from lexer/parser spans; diagnostic dedup
Round 7: Find/replace panel; Ctrl+G go-to-line; toggle line comment; word-wrap compartment fix
Round 8: Code completion — 50+ builtins, keyword completions, snippet completions, server snippet integration
Round 9: Resizable panels — file tree drag-resize + collapse (Ctrl+B), type-graph drag-resize, bottom panel toggle (Ctrl+J), width persistence
Round 10: Settings API (GET/POST/DELETE /api/settings, ~/.el-ide/settings.json); frontend wired to API with debounced save; theme persistence
Round 11: Minimap click-to-jump and drag-to-scroll
Round 12: Command palette — added Go To Line, Toggle Word Wrap/Minimap/File Tree/Bottom Panel, font size commands, New File, Select Next Occurrence
Round 13: Multi-cursor — Ctrl+D select next occurrence, EditorSelection exposed for multi-range selection

crates/el-ide-server/src/embed.rs

@@ -1,7 +1,6 @@
 //! Embedded static assets via rust-embed.
 
 use axum::{
-    extract::Path,
     http::{header, StatusCode},
     response::{IntoResponse, Response},
 };
@@ -16,9 +15,9 @@ pub async fn serve_index() -> impl IntoResponse {
     serve_file("index.html")
 }
 
-/// Serve any embedded asset by path.
-pub async fn serve_asset(Path(path): Path<String>) -> impl IntoResponse {
-    serve_file(&path)
+/// Fallback handler — serves index.html for unknown paths (SPA routing).
+pub async fn fallback() -> impl IntoResponse {
+    serve_file("index.html")
 }
 
 fn serve_file(path: &str) -> Response {