chore: clean up repo for public release

- Remove BMAD framework, IDE configs, dev screenshots, test files,
  internal docs, and backup files
- Rename keep-notes/ to memento-note/
- Update all references from keep-notes to memento-note
- Add Apache 2.0 license with Commons Clause (non-commercial restriction)
- Add clean .gitignore and .env.docker.example

memento-note/lib/label-storage.ts

@@ -0,0 +1,57 @@
+import { LabelColorName } from './types'
+
+const STORAGE_KEY = 'memento-label-colors'
+
+// Store label colors in localStorage
+export function getLabelColor(label: string): LabelColorName {
+  if (typeof window === 'undefined') return 'gray'
+  
+  try {
+    const stored = localStorage.getItem(STORAGE_KEY)
+    if (!stored) return 'gray'
+    
+    const colors = JSON.parse(stored) as Record<string, LabelColorName>
+    return colors[label] || 'gray'
+  } catch {
+    return 'gray'
+  }
+}
+
+export function setLabelColor(label: string, color: LabelColorName) {
+  if (typeof window === 'undefined') return
+  
+  try {
+    const stored = localStorage.getItem(STORAGE_KEY)
+    const colors = stored ? JSON.parse(stored) as Record<string, LabelColorName> : {}
+    colors[label] = color
+    localStorage.setItem(STORAGE_KEY, JSON.stringify(colors))
+  } catch (error) {
+    console.error('Failed to save label color:', error)
+  }
+}
+
+export function getAllLabelColors(): Record<string, LabelColorName> {
+  if (typeof window === 'undefined') return {}
+  
+  try {
+    const stored = localStorage.getItem(STORAGE_KEY)
+    return stored ? JSON.parse(stored) : {}
+  } catch {
+    return {}
+  }
+}
+
+export function deleteLabelColor(label: string) {
+  if (typeof window === 'undefined') return
+  
+  try {
+    const stored = localStorage.getItem(STORAGE_KEY)
+    if (!stored) return
+    
+    const colors = JSON.parse(stored) as Record<string, LabelColorName>
+    delete colors[label]
+    localStorage.setItem(STORAGE_KEY, JSON.stringify(colors))
+  } catch (error) {
+    console.error('Failed to delete label color:', error)
+  }
+}