chore: remove dead code — 8 components, 5 libs, 4 API routes, 4 npm packages, 30+ scripts, dead CSS, dead exports

Removed unused components:
- brainstorm-canvas, brainstorm-create-dialog, invite-dialog, manual-idea-dialog
- note-inline-editor, profile-page-header, quota-paywall, label-management-dialog

Removed dead lib files:
- api-auth.ts, color-harmony-recommendation.ts, label-storage.ts, modern-color-options.ts
- hooks/use-card-size-mode.ts

Removed dead API routes:
- ai/test-chat, ai/test-embeddings, ai/test-tags, admin/randomize-labels

Removed unused npm packages:
- cmdk, novel, tippy.js, react-force-graph-2d

Cleaned dead CSS from globals.css:
- acrylic-*, win11-shadow-*, muuri-grid/item, ai-glass, ai-tab-indicator, ai-send-btn, sidebar-view-toggle, memento-sidebar-depth

Removed 29 orphan scripts and 3 root orphan files

Cleaned dead exports from 8 lib files:
- NOTE_TYPE_CONFIG, getPublishableKey, PROVIDER_DEFAULTS, useNotes/useNote/invalidateNote, etc.

memento-note/hooks/use-card-size-mode.ts

@@ -1,37 +0,0 @@
-'use client'
-
-import { useState, useEffect, useCallback } from 'react'
-
-type CardSizeMode = 'variable' | 'uniform'
-
-export function useCardSizeMode(): CardSizeMode {
-  const [mode, setMode] = useState<CardSizeMode>('variable')
-
-  useEffect(() => {
-    // Check localStorage first (for immediate UI response)
-    const stored = localStorage.getItem('card-size-mode') as CardSizeMode | null
-    if (stored && (stored === 'variable' || stored === 'uniform')) {
-      setMode(stored)
-    }
-
-    // Listen for storage changes (when user changes setting in another tab)
-    const handleStorageChange = (e: StorageEvent) => {
-      if (e.key === 'card-size-mode') {
-        const newMode = e.newValue as CardSizeMode | null
-        if (newMode && (newMode === 'variable' || newMode === 'uniform')) {
-          setMode(newMode)
-        }
-      }
-    }
-
-    window.addEventListener('storage', handleStorageChange)
-    return () => window.removeEventListener('storage', handleStorageChange)
-  }, [])
-
-  return mode
-}
-
-export function useIsUniformSize(): boolean {
-  const mode = useCardSizeMode()
-  return mode === 'uniform'
-}