Add search history and zoom controls to settings

Implemented search history tracking and display using localStorage, with options to clear history from the settings page. Replaced the display scale slider with interactive zoom controls and preset buttons, applying zoom changes immediately. Updated styles and HTML structure to support these new features.

renderer/script.js

@@ -128,6 +128,38 @@ function addToSiteHistory(url) {
   }
 }
 
+// Search history management using localStorage
+function getSearchHistory() {
+  try {
+    const history = localStorage.getItem('searchHistory');
+    return history ? JSON.parse(history) : [];
+  } catch (err) {
+    console.error('Error reading search history from localStorage:', err);
+    return [];
+  }
+}
+
+function addToSearchHistory(searchQuery) {
+  try {
+    let history = getSearchHistory();
+    // Remove if already exists to avoid duplicates
+    history = history.filter(item => item !== searchQuery);
+    // Add to beginning
+    history.unshift(searchQuery);
+    // Keep only last 100 entries
+    if (history.length > 100) {
+      history = history.slice(0, 100);
+    }
+    localStorage.setItem('searchHistory', JSON.stringify(history));
+    // Also save to file via IPC for persistence
+    if (window.electronAPI && window.electronAPI.invoke) {
+      window.electronAPI.invoke('save-search-history', history);
+    }
+  } catch (err) {
+    console.error('Error saving search history to localStorage:', err);
+  }
+}
+
 // Store current theme colors globally for use by renderTabs
 let currentThemeColors = null;
 
@@ -653,6 +685,7 @@ function performNavigation(input, originalInputForHistory) {
   const isInternal = input.startsWith('nebula://');
   const isLikelyUrl = hasProtocol || input.includes('.');
   let resolved;
+  let isSearch = false;
   if (isFileProtocol) {
     resolved = input;
   } else if (looksLikeLocalPath) {
@@ -660,6 +693,9 @@ function performNavigation(input, originalInputForHistory) {
     if (/^[A-Za-z]:\//.test(p)) resolved = 'file:///' + encodeURI(p); else if (p.startsWith('/')) resolved = 'file://' + encodeURI(p); else resolved = 'file://' + encodeURI(p);
   } else if (!isInternal && !isLikelyUrl) {
     resolved = `https://www.google.com/search?q=${encodeURIComponent(input)}`;
+    isSearch = true;
+    // Save to search history
+    addToSearchHistory(input);
   } else {
     resolved = resolveInternalUrl(input);
   }