diff --git a/craft/src/panels/left/BlocksPanel.test.tsx b/craft/src/panels/left/BlocksPanel.test.tsx
new file mode 100644
index 0000000..adcab52
--- /dev/null
+++ b/craft/src/panels/left/BlocksPanel.test.tsx
@@ -0,0 +1,119 @@
+import { describe, test, expect, afterEach, beforeEach } from 'vitest';
+import React from 'react';
+import { renderEditorHarness, EditorHarness } from '../../test-utils/editorHarness';
+import { BlocksPanel } from './BlocksPanel';
+import { searchBlocks } from './blocks-registry';
+
+let h: EditorHarness | null = null;
+beforeEach(() => { window.localStorage.clear(); });
+afterEach(() => { h?.unmount(); h = null; });
+
+function mountPanel(): EditorHarness {
+  const hh = renderEditorHarness();
+  hh.mountChild(<BlocksPanel />);
+  return hh;
+}
+
+const input = (hh: EditorHarness) => hh.container.querySelector('input[aria-label="Search blocks"]') as HTMLInputElement;
+const tileIds = (hh: EditorHarness) => Array.from(hh.container.querySelectorAll('.block-item')).map((e) => e.getAttribute('data-block-id'));
+const headers = (hh: EditorHarness) => Array.from(hh.container.querySelectorAll('.block-category-header'));
+
+function type(hh: EditorHarness, value: string) {
+  hh.act(() => {
+    const setter = Object.getOwnPropertyDescriptor(HTMLInputElement.prototype, 'value')!.set!;
+    setter.call(input(hh), value);
+    input(hh).dispatchEvent(new Event('input', { bubbles: true }));
+  });
+}
+function key(hh: EditorHarness, k: string) {
+  hh.act(() => { input(hh).dispatchEvent(new KeyboardEvent('keydown', { key: k, bubbles: true })); });
+}
+
+describe('BlocksPanel search', () => {
+  test('typing "pric" shows a flat list of the matching blocks, no category headers', () => {
+    h = mountPanel();
+    type(h, 'pric');
+    const expected = searchBlocks('pric').map((b) => b.id);
+    expect(expected[0]).toBe('pricing-table');
+    expect(tileIds(h)).toEqual(expected);
+    expect(tileIds(h).length).toBeLessThan(10);
+    expect(headers(h)).toHaveLength(0);
+  });
+
+  test('Enter inserts the first result into the canvas and selects it', () => {
+    h = mountPanel();
+    type(h, 'pric');
+    key(h, 'Enter');
+    const nodes = JSON.parse(h.getSerialized());
+    const rootKids: string[] = nodes.ROOT.nodes;
+    expect(rootKids).toHaveLength(1);
+    expect(nodes[rootKids[0]].type.resolvedName).toBe('PricingTable');
+    expect(h.query.getEvent('selected').all()).toEqual([rootKids[0]]);
+  });
+
+  test('Enter inserts the FIRST of several results (ranked label-prefix)', () => {
+    h = mountPanel();
+    type(h, 'form');
+    expect(tileIds(h).length).toBeGreaterThan(1);
+    key(h, 'Enter');
+    const nodes = JSON.parse(h.getSerialized());
+    expect(nodes[nodes.ROOT.nodes[0]].type.resolvedName).toBe('FormContainer');
+  });
+
+  test('Enter and Escape do not bubble to React ancestors of the input', () => {
+    let seen: string[] = [];
+    h = renderEditorHarness();
+    h.mountChild(<div onKeyDown={(e) => seen.push(e.key)}><BlocksPanel /></div>);
+    type(h, 'pric');
+    key(h, 'Enter');
+    key(h, 'Escape');
+    expect(seen).toEqual([]);
+  });
+
+  test('Enter with no results inserts nothing', () => {
+    h = mountPanel();
+    type(h, 'zzzz-nothing');
+    key(h, 'Enter');
+    expect(JSON.parse(h.getSerialized()).ROOT.nodes).toHaveLength(0);
+    expect(h.container.textContent).toContain('No blocks match');
+  });
+
+  test('Escape and clearing the input restore the categories', () => {
+    h = mountPanel();
+    type(h, 'pric');
+    key(h, 'Escape');
+    expect(input(h).value).toBe('');
+    expect(headers(h).length).toBeGreaterThan(1);
+    type(h, 'pric');
+    type(h, '');
+    expect(headers(h).length).toBeGreaterThan(1);
+  });
+
+  test('filtered tiles are still drag sources (Craft marks them draggable)', () => {
+    h = mountPanel();
+    type(h, 'pric');
+    const tiles = Array.from(h.container.querySelectorAll('.block-item'));
+    expect(tiles.length).toBeGreaterThan(0);
+    for (const t of tiles) expect(t.getAttribute('draggable')).toBe('true');
+  });
+});
+
+describe('BlocksPanel categories', () => {
+  test('all categories are expanded initially', () => {
+    h = mountPanel();
+    expect(headers(h).length).toBeGreaterThan(1);
+    expect(h.container.querySelectorAll('.collapsed')).toHaveLength(0);
+  });
+
+  test('collapsing Forms is remembered across a remount', () => {
+    h = mountPanel();
+    const forms = () => headers(h!).find((e) => e.textContent === 'Forms') as HTMLElement;
+    h.act(() => { forms().click(); });
+    expect(forms().classList.contains('collapsed')).toBe(true);
+    h.unmount();
+    h = mountPanel();
+    expect(forms().classList.contains('collapsed')).toBe(true);
+    const basic = headers(h).find((e) => e.textContent === 'Basic')!;
+    expect(basic.classList.contains('collapsed')).toBe(false);
+  });
+});
diff --git a/craft/src/panels/left/BlocksPanel.tsx b/craft/src/panels/left/BlocksPanel.tsx
index 65c4b20..77b6c96 100644
--- a/craft/src/panels/left/BlocksPanel.tsx
+++ b/craft/src/panels/left/BlocksPanel.tsx
@@ -1,8 +1,9 @@
-import React, { useCallback, useState } from 'react';
+import React, { useCallback, useMemo, useState } from 'react';
 import { useEditor } from '@craftjs/core';
 import { useIsMobile } from '../../hooks/useIsMobile';
 import { useMobileChrome } from '../../state/MobileChromeContext';
-import { BLOCKS, BLOCK_CATEGORIES, BlockDef, insertBlock } from './blocks-registry';
+import { getPref, setPref } from '../../utils/local-prefs';
+import { BLOCKS, BLOCK_CATEGORIES, BlockDef, insertBlock, searchBlocks } from './blocks-registry';
 
 // The business category is empty until its blocks land; hide empty groups.
 const categories = BLOCK_CATEGORIES
@@ -13,18 +14,34 @@ export const BlocksPanel: React.FC = () => {
   const { connectors, actions, query } = useEditor();
   const isMobile = useIsMobile();
   const { closeSheet } = useMobileChrome();
+  // All categories start open; a collapse the user made is remembered per category.
   const [collapsed, setCollapsed] = useState<Record<string, boolean>>(() => {
     const initial: Record<string, boolean> = {};
-    categories.forEach((cat, index) => {
-      initial[cat.id] = index !== 0; // First category open
-    });
+    categories.forEach((cat) => { initial[cat.id] = getPref<boolean>('blocks:collapsed:' + cat.id, false) === true; });
     return initial;
   });
+  const [search, setSearch] = useState('');
 
   const toggleCategory = (categoryId: string) => {
-    setCollapsed((prev) => ({ ...prev, [categoryId]: !prev[categoryId] }));
+    const next = !collapsed[categoryId];
+    setPref('blocks:collapsed:' + categoryId, next);
+    setCollapsed((prev) => ({ ...prev, [categoryId]: next }));
   };
 
+  // Drag elements are built once per mount (not every render) so typing in the
+  // search box doesn't churn fresh elements / re-register every tile.
+  const dragRefs = useMemo(() => {
+    const map = new Map<string, (el: HTMLElement | null) => void>();
+    BLOCKS.forEach((block) => {
+      const element = block.create();
+      map.set(block.id, (el) => { if (el) connectors.create(el, element); });
+    });
+    return map;
+  // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, []);
+
+  const results = useMemo(() => (search.trim() ? searchBlocks(search) : null), [search]);
+
   /** Shared by desktop double-click (append to the default canvas, no
    *  selection change) and mobile tap-to-add (insert after the selection;
    *  the select/scroll step is deferred below). Returns the new node id. */
@@ -62,9 +79,54 @@ export const BlocksPanel: React.FC = () => {
     });
   }, [addBlockNode, closeSheet, actions, query]);
 
+  const renderTile = (block: BlockDef) => (
+    <div
+      key={block.id}
+      className="block-item"
+      data-block-id={block.id}
+      ref={dragRefs.get(block.id)}
+      onDoubleClick={() => addBlockNode(block, false)}
+      onClick={isMobile ? () => handleTapToAdd(block) : undefined}
+      title={isMobile ? `Tap to add ${block.label}` : `Drag or double-click to add ${block.label}`}
+    >
+      <i className={`fa ${block.icon} block-item-icon`} />
+      <span className="block-item-label">{block.label}</span>
+    </div>
+  );
+
+  const onSearchKeyDown = (e: React.KeyboardEvent<HTMLInputElement>) => {
+    if (e.key === 'Enter') {
+      e.stopPropagation();
+      if (results && results.length > 0) {
+        insertBlock(query, actions, results[0].id, { afterSelection: true });
+        if (isMobile) closeSheet();
+      }
+    } else if (e.key === 'Escape') {
+      e.stopPropagation();
+      setSearch('');
+    }
+  };
+
   return (
     <div>
-      {categories.map((category) => {
+      <div className="block-search">
+        <input
+          type="search"
+          className="block-search-input"
+          placeholder="Search blocks…"
+          aria-label="Search blocks"
+          value={search}
+          onChange={(e) => setSearch(e.target.value)}
+          onKeyDown={onSearchKeyDown}
+        />
+      </div>
+      {results ? (
+        results.length > 0 ? (
+          <div className="block-grid block-search-results">{results.map(renderTile)}</div>
+        ) : (
+          <div className="block-search-empty">No blocks match "{search.trim()}"</div>
+        )
+      ) : categories.map((category) => {
         const isCollapsed = collapsed[category.id];
         return (
           <div key={category.id} className="block-category">
@@ -76,21 +138,7 @@ export const BlocksPanel: React.FC = () => {
               <i className="fa fa-chevron-down chevron" />
             </div>
             <div className={`block-category-items ${isCollapsed ? 'collapsed' : ''}`}>
-              <div className="block-grid">
-                {category.blocks.map((block) => (
-                  <div
-                    key={block.id}
-                    className="block-item"
-                    ref={(ref) => { if (ref) connectors.create(ref, block.create()); }}
-                    onDoubleClick={() => addBlockNode(block, false)}
-                    onClick={isMobile ? () => handleTapToAdd(block) : undefined}
-                    title={isMobile ? `Tap to add ${block.label}` : `Drag or double-click to add ${block.label}`}
-                  >
-                    <i className={`fa ${block.icon} block-item-icon`} />
-                    <span className="block-item-label">{block.label}</span>
-                  </div>
-                ))}
-              </div>
+              <div className="block-grid">{category.blocks.map(renderTile)}</div>
             </div>
           </div>
         );
diff --git a/craft/src/panels/left/LeftPanel.test.tsx b/craft/src/panels/left/LeftPanel.test.tsx
new file mode 100644
index 0000000..2097cad
--- /dev/null
+++ b/craft/src/panels/left/LeftPanel.test.tsx
@@ -0,0 +1,39 @@
+import { describe, test, expect, afterEach, beforeEach } from 'vitest';
+import React from 'react';
+import { renderEditorHarness, EditorHarness } from '../../test-utils/editorHarness';
+import { PageProvider } from '../../state/PageContext';
+import { LeftPanel } from './LeftPanel';
+
+let h: EditorHarness | null = null;
+beforeEach(() => { window.localStorage.clear(); });
+afterEach(() => { h?.unmount(); h = null; });
+
+function mountPanel(): EditorHarness {
+  const hh = renderEditorHarness();
+  hh.mountChild(<PageProvider><LeftPanel /></PageProvider>);
+  return hh;
+}
+const activeTab = (hh: EditorHarness) => hh.container.querySelector('.panel-tab.active')?.textContent;
+
+describe('LeftPanel remembers its tab', () => {
+  test('defaults to Blocks', () => {
+    h = mountPanel();
+    expect(activeTab(h)).toBe('Blocks');
+  });
+
+  test('clicking Pages then remounting shows Pages', () => {
+    h = mountPanel();
+    const pages = Array.from(h.container.querySelectorAll('.panel-tab')).find((b) => b.textContent === 'Pages') as HTMLElement;
+    h.act(() => { pages.click(); });
+    expect(activeTab(h)).toBe('Pages');
+    h.unmount();
+    h = mountPanel();
+    expect(activeTab(h)).toBe('Pages');
+  });
+
+  test('an unknown stored tab falls back to Blocks', () => {
+    window.localStorage.setItem('wsb:leftTab', JSON.stringify('bogus'));
+    h = mountPanel();
+    expect(activeTab(h)).toBe('Blocks');
+  });
+});
diff --git a/craft/src/panels/left/LeftPanel.tsx b/craft/src/panels/left/LeftPanel.tsx
index eb9eae5..0e05ee9 100644
--- a/craft/src/panels/left/LeftPanel.tsx
+++ b/craft/src/panels/left/LeftPanel.tsx
@@ -3,11 +3,17 @@ import { BlocksPanel } from './BlocksPanel';
 import { PagesPanel } from './PagesPanel';
 import { LayersPanel } from './LayersPanel';
 import { AssetsPanel } from './AssetsPanel';
+import { getPref, setPref } from '../../utils/local-prefs';
 
 type LeftTab = 'blocks' | 'pages' | 'layers' | 'assets';
+const TAB_IDS: LeftTab[] = ['blocks', 'pages', 'layers', 'assets'];
 
 export const LeftPanel: React.FC = () => {
-  const [activeTab, setActiveTab] = useState<LeftTab>('blocks');
+  const [activeTab, setActiveTab] = useState<LeftTab>(() => {
+    const saved = getPref<string>('leftTab', 'blocks');
+    return (TAB_IDS as string[]).includes(saved) ? (saved as LeftTab) : 'blocks';
+  });
+  const selectTab = (id: LeftTab) => { setActiveTab(id); setPref('leftTab', id); };
 
   const tabs: { id: LeftTab; label: string }[] = [
     { id: 'blocks', label: 'Blocks' },
@@ -23,7 +29,7 @@ export const LeftPanel: React.FC = () => {
           <button
             key={tab.id}
             className={`panel-tab ${activeTab === tab.id ? 'active' : ''}`}
-            onClick={() => setActiveTab(tab.id)}
+            onClick={() => selectTab(tab.id)}
           >
             {tab.label}
           </button>
diff --git a/craft/src/styles/editor.css b/craft/src/styles/editor.css
index adf849c..cf0712a 100644
--- a/craft/src/styles/editor.css
+++ b/craft/src/styles/editor.css
@@ -2184,3 +2184,33 @@ body {
     bottom: calc(var(--mobile-tabbar-height) + env(safe-area-inset-bottom, 0px) + 12px);
   }
 }
+
+/* --------------------------------------------------------------------------
+   #38 block search
+   -------------------------------------------------------------------------- */
+.block-search {
+  padding: 0 0 10px;
+}
+
+.block-search-input {
+  width: 100%;
+  padding: 7px 10px;
+  font-size: 12px;
+  color: var(--color-text);
+  background: var(--color-bg-base);
+  border: 1px solid var(--color-border);
+  border-radius: var(--radius-sm);
+  outline: none;
+  transition: border-color var(--transition-fast);
+}
+
+.block-search-input:focus {
+  border-color: var(--color-accent);
+}
+
+.block-search-empty {
+  padding: 16px 4px;
+  font-size: 12px;
+  color: var(--color-text-muted);
+  text-align: center;
+}