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/context/home-view-context.tsx

@@ -0,0 +1,36 @@
+'use client'
+
+import { createContext, useContext, useMemo, useState, type ReactNode } from 'react'
+
+export type HomeUiControls = {
+  isTabsMode: boolean
+  openNoteComposer: () => void
+}
+
+type Ctx = {
+  controls: HomeUiControls | null
+  setControls: (c: HomeUiControls | null) => void
+}
+
+const HomeViewContext = createContext<Ctx | null>(null)
+
+export function HomeViewProvider({ children }: { children: ReactNode }) {
+  const [controls, setControls] = useState<HomeUiControls | null>(null)
+  const value = useMemo(() => ({ controls, setControls }), [controls])
+
+  return <HomeViewContext.Provider value={value}>{children}</HomeViewContext.Provider>
+}
+
+/** Enregistré par la page d’accueil ; la sidebar lit `controls` */
+export function useHomeView() {
+  const ctx = useContext(HomeViewContext)
+  if (!ctx) {
+    throw new Error('useHomeView must be used within HomeViewProvider')
+  }
+  return ctx
+}
+
+/** Sidebar / shells : ne pas planter si hors provider */
+export function useHomeViewOptional(): Ctx | null {
+  return useContext(HomeViewContext)
+}