feat: icon-only toolbar, versioning fixes, history modal, PanelRight repositioning

- Toolbar: remove text labels from all icon buttons (AI, Save, Preview, Convert)
  all buttons now icon-only with title tooltip for accessibility
- Toolbar: reposition PanelRight (info panel toggle) to far right after three-dot menu
- Versioning: decouple getNoteHistory/restoreNoteVersion from global userAISettings.noteHistory
  now checks note.historyEnabled directly — unblocks manual per-note history
- Versioning: add 'Sauvegarder cette version' button in Versions tab of info panel
  calls commitNoteHistory with visual feedback (spinner → success state)
- note-document-info-panel: import commitNoteHistory, add isSavingVersion state
- notes.ts: fix double guard that silently blocked all history operations

memento-note/.env.example

@@ -22,26 +22,36 @@ NEXTAUTH_URL="http://localhost:3000"
 # -----------------------------------------------------------------------------
 # AI Providers
 # -----------------------------------------------------------------------------
-# Main provider: "openai" | "ollama" | "deepseek" | "openrouter" | "custom-openai"
+# Main provider: "openai" | "anthropic" | "anthropic_custom" | "ollama" | "deepseek" | "openrouter" | "custom-openai"
 # AI_PROVIDER="openai"
 
 # Per-feature provider overrides (optional, falls back to AI_PROVIDER)
 # AI_PROVIDER_CHAT="openai"
-# AI_PROVIDER_TAGS="openai"
+# AI_PROVIDER_TAGS="anthropic"
 # AI_PROVIDER_EMBEDDING="openai"
 
 # Model names (optional, uses provider defaults)
 # AI_MODEL_CHAT="gpt-4o-mini"
-# AI_MODEL_TAGS="gpt-4o-mini"
+# AI_MODEL_TAGS="claude-sonnet-4-20250514"
 # AI_MODEL_EMBEDDING="text-embedding-3-small"
 
 # OpenAI
 # OPENAI_API_KEY="sk-..."
 
+# Anthropic (official Messages API — tags/chat only; use another provider for embeddings)
+# ANTHROPIC_API_KEY="sk-ant-api03-..."
+
+# Anthropic-compatible Messages API (custom host — ex. MiniMax M2.7, pas OpenAI)
+# Same key as sur https://platform.minimax.io — base URL sans slash final.
+# ANTHROPIC_CUSTOM_API_KEY="<MINIMAX_API_KEY>"
+# ANTHROPIC_CUSTOM_BASE_URL="https://api.minimax.io/anthropic"
+# China: https://api.minimaxi.com/anthropic — Model ID admin: MiniMax-M2.7
+# Embeddings MiniMax: utiliser CUSTOM_* avec https://api.minimax.io/v1
+
 # Ollama (local)
 # OLLAMA_BASE_URL="http://localhost:11434"
 
-# Custom OpenAI-compatible endpoint
+# Custom OpenAI-compatible endpoint (incl. MiniMax OpenAI API /v1)
 # CUSTOM_OPENAI_API_KEY="..."
 # CUSTOM_OPENAI_BASE_URL="https://your-provider.com/v1"