refine(sticky): reduce preset sizes and remove pan tool shortcuts

frontend/src/canvas/stickyPresets.ts

@@ -11,11 +11,11 @@ export type StickyTextSize = 'S' | 'M' | 'L' | 'XL' | 'XXL';
 export const STICKY_SIZES: StickyTextSize[] = ['S', 'M', 'L', 'XL', 'XXL'];
 
 export const STICKY_FONT_MAP: Record<StickyTextSize, number> = {
-  S: 20, M: 28, L: 36, XL: 48, XXL: 60,
+  S: 12, M: 14, L: 18, XL: 24, XXL: 32,
 };
 
 export const STICKY_WIDTH_MAP: Record<StickyTextSize, number> = {
-  S: 200, M: 260, L: 320, XL: 400, XXL: 480,
+  S: 180, M: 220, L: 280, XL: 340, XXL: 420,
 };
 
 /** Default preset for new sticky creation. */

frontend/src/canvas/tools.ts

@@ -1,10 +1,9 @@
 /**
  * Tools — PixiJS version.
  *
- * SELECT/PAN are handled by the viewport (pixi-viewport) and SelectionManager.
- * PEN/TEXT/ERASER need PixiJS implementations.
- * For now, only SELECT and PAN are fully functional; PEN/TEXT/ERASER are stubs
- * that will be implemented when drawing support is added.
+ * Canvas navigation is handled by the viewport (space-drag, middle-drag, etc.)
+ * and SelectionManager.
+ * PEN/TEXT/ERASER/STICKY are PixiJS tool modes.
  */
 
 import type { Viewport } from 'pixi-viewport';
@@ -400,12 +399,10 @@ export function activateTool(
 
 export const toolShortcuts: Record<string, ToolType> = {
   v: ToolType.SELECT,
-  h: ToolType.PAN,
   p: ToolType.PEN,
   t: ToolType.TEXT,
   s: ToolType.STICKY,
   '1': ToolType.SELECT,
-  '2': ToolType.PAN,
   '3': ToolType.PEN,
   '4': ToolType.TEXT,
   '5': ToolType.STICKY,

frontend/src/components/ShortcutsHelp.tsx

@@ -45,7 +45,6 @@ export default function ShortcutsHelp({ shortcuts, onClose }: ShortcutsHelpProps
   // Additional tool shortcuts not in registry
   const toolShortcuts = [
     { keys: 'V / 1', description: 'Select tool' },
-    { keys: 'H / 2', description: 'Pan tool' },
     { keys: 'P / 3', description: 'Draw tool' },
     { keys: 'T / 4', description: 'Text tool' },
     { keys: 'S / 5', description: 'Sticky note tool' },

frontend/src/components/Toolbar.tsx

@@ -46,14 +46,6 @@ function IconSelect() {
   );
 }
 
-function IconPan() {
-  return (
-    <svg width="16" height="16" viewBox="0 0 16 16" fill="none" stroke="currentColor" strokeWidth="1.5">
-      <path d="M8 1v14M1 8h14M4 4L8 1L12 4M4 12L8 15L12 12M1 4L4 8L1 12M15 4L12 8L15 12" strokeLinejoin="round" />
-    </svg>
-  );
-}
-
 function IconPen() {
   return (
     <svg width="16" height="16" viewBox="0 0 16 16" fill="none" stroke="currentColor" strokeWidth="1.5">
@@ -129,7 +121,6 @@ function IconLayers() {
 
 const toolButtons: { tool: ToolType; label: string; shortcut: string; numKey: string; Icon: React.FC; hint?: string }[] = [
   { tool: ToolType.SELECT, label: 'Select', shortcut: 'V', numKey: '1', Icon: IconSelect, hint: 'Click to select, drag to move, Shift+click for multi-select' },
-  { tool: ToolType.PAN, label: 'Pan', shortcut: 'H', numKey: '2', Icon: IconPan, hint: 'Click and drag to pan the canvas' },
   { tool: ToolType.PEN, label: 'Draw', shortcut: 'P', numKey: '3', Icon: IconPen, hint: 'Click and drag to draw freehand' },
   { tool: ToolType.TEXT, label: 'Text', shortcut: 'T', numKey: '4', Icon: IconText, hint: 'Click on the canvas to place text' },
   { tool: ToolType.STICKY, label: 'Sticky', shortcut: 'S', numKey: '5', Icon: IconSticky, hint: 'Click on the canvas to place a sticky note' },

frontend/src/hooks/useShortcutHandler.ts

@@ -56,7 +56,7 @@ export function useShortcutHandler(deps: ShortcutHandlerDeps) {
       const viewport = canvasRef.current?.getViewport();
       if (!scene || !selection || !viewport) return;
 
-      // Tool shortcuts (bare keys 1-5, v/h/p/t/e -- no modifiers)
+      // Tool shortcuts (bare keys only for the primary visible tools)
       if (!e.ctrlKey && !e.metaKey && !e.altKey) {
         const tool = toolShortcuts[e.key.toLowerCase()];
         if (tool) {