Address code review feedback - fix UTF-8 truncation, improve readability, and portable shebang

Co-authored-by: yiwang <142937+yiwang@users.noreply.github.com>

Author: Copilot

build-egui-web.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # Build script for LocalGPT egui web UI
 #
 # This script compiles the server crate to WASM and generates the necessary

crates/server/src/web/app.rs

@@ -65,7 +65,9 @@ impl eframe::App for WebApp {
                     }
 
                     if let Some(ref id) = self.session_id {
-                        ui.label(format!("Session: {}...", &id[..8.min(id.len())]));
+                        // Safe truncation that respects UTF-8 character boundaries
+                        let truncated: String = id.chars().take(8).collect();
+                        ui.label(format!("Session: {}...", truncated));
                     }
                 });
             });
@@ -105,7 +107,10 @@ impl eframe::App for WebApp {
                         .hint_text("Type a message..."),
                 );
 
-                if ui.button("Send").clicked() || (input_response.has_focus() && ui.input(|i| i.key_pressed(egui::Key::Enter) && !i.modifiers.shift)) {
+                let enter_without_shift = input_response.has_focus() 
+                    && ui.input(|i| i.key_pressed(egui::Key::Enter) && !i.modifiers.shift);
+
+                if ui.button("Send").clicked() || enter_without_shift {
                     self.send_message();
                     input_response.request_focus();
                 }