feat: add DeepSeek and Minimax (m2.7) translation providers

New providers:
- DeepSeek: direct API with deepseek-chat model, very cost-effective
- Minimax: MiniMax-M1 model via OpenAI-compatible API, supports m2.7

Changes:
- Full provider implementations with retry, health check, batch support
- Provider config with env vars (DEEPSEEK_*, MINIMAX_*)
- Auto-registration in provider registry
- Updated fallback chain to include new providers
- Updated setup-env.sh wizard with options 6 (deepseek) and 7 (minimax)
- Updated manage-keys.sh with new menu entries and provider switching
- Updated docker-compose.yml with new env vars

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

scripts/manage-keys.sh

@@ -101,6 +101,8 @@ while true; do
     show_key_status "OpenAI"        "OPENAI_API_KEY"
     show_key_status "DeepL"         "DEEPL_API_KEY"
     show_key_status "OpenRouter"    "OPENROUTER_API_KEY"
+    show_key_status "DeepSeek"      "DEEPSEEK_API_KEY"
+    show_key_status "Minimax"       "MINIMAX_API_KEY"
     show_key_status "Google"        "GOOGLE_API_KEY"
     echo ""
 
@@ -121,7 +123,9 @@ while true; do
     echo "  4) Configurer Stripe (toutes les cles)"
     echo "  5) Changer le mot de passe admin"
     echo "  6) Changer le service de traduction"
-    echo "  7) Tout afficher (attention: secrets visibles)"
+    echo "  7) Configurer DeepSeek"
+    echo "  8) Configurer Minimax (m2.7)"
+    echo "  9) Tout afficher (attention: secrets visibles)"
     echo "  0) Quitter"
     echo ""
     echo -ne "${YELLOW}Choix:${NC} "
@@ -192,10 +196,12 @@ while true; do
         6)
             echo -e "\n${BOLD}--- Service de traduction ---${NC}"
             echo "  Actuel: $(get_env TRANSLATION_SERVICE)"
-            echo "  1) ollama   (local, gratuit)"
-            echo "  2) deepl    (haute qualite)"
-            echo "  3) openai   (GPT)"
+            echo "  1) ollama     (local, gratuit)"
+            echo "  2) deepl      (haute qualite)"
+            echo "  3) openai     (GPT)"
             echo "  4) openrouter (multi-modeles)"
+            echo "  5) deepseek   (bon rapport qualite/prix)"
+            echo "  6) minimax    (MiniMax-M1 / m2.7)"
             echo ""
             echo -ne "  Choix: "
             read -r svc
@@ -204,12 +210,34 @@ while true; do
                 2) set_env "TRANSLATION_SERVICE" "deepl" ;;
                 3) set_env "TRANSLATION_SERVICE" "openai" ;;
                 4) set_env "TRANSLATION_SERVICE" "openrouter" ;;
+                5) set_env "TRANSLATION_SERVICE" "deepseek" ;;
+                6) set_env "TRANSLATION_SERVICE" "minimax" ;;
                 *) echo -e "  ${RED}Choix invalide${NC}" ;;
             esac
             echo -e "  ${GREEN}Service mis a jour${NC}"
             echo -e "  ${YELLOW}Redemarre: docker compose restart backend${NC}"
             ;;
         7)
+            echo -e "\n${BOLD}--- DeepSeek ---${NC}"
+            echo "  Ou: https://platform.deepseek.com/api_keys"
+            echo "  Modele par defaut: deepseek-chat"
+            ask_key "DeepSeek" "DEEPSEEK_API_KEY"
+            if [ -n "$(get_env DEEPSEEK_API_KEY)" ]; then
+                set_env "DEEPSEEK_ENABLED" "true"
+                echo -e "  ${GREEN}Provider DeepSeek active${NC}"
+            fi
+            ;;
+        8)
+            echo -e "\n${BOLD}--- Minimax (m2.7 / MiniMax-M1) ---${NC}"
+            echo "  Ou: https://platform.minimaxi.com/"
+            echo "  Modele par defaut: MiniMax-M1"
+            ask_key "Minimax" "MINIMAX_API_KEY"
+            if [ -n "$(get_env MINIMAX_API_KEY)" ]; then
+                set_env "MINIMAX_ENABLED" "true"
+                echo -e "  ${GREEN}Provider Minimax active${NC}"
+            fi
+            ;;
+        9)
             echo ""
             echo -e "${RED}${BOLD}ATTENTION: Secrets visibles!${NC}"
             echo -ne "${YELLOW}Taper 'oui' pour continuer:${NC} "

scripts/setup-env.sh

@@ -157,12 +157,14 @@ echo ""
 echo -e "${BOLD}--- Services de traduction ---${NC}"
 echo ""
 echo "Quel service de traduction par defaut ?"
-echo "  1) ollama  (local, gratuit)"
-echo "  2) google  (API payante)"
-echo "  3) deepl   (API payante, haute qualite)"
-echo "  4) openai  (GPT, payant)"
+echo "  1) ollama     (local, gratuit)"
+echo "  2) google     (API gratuite via deep_translator)"
+echo "  3) deepl      (haute qualite, 500k car/mois gratuit)"
+echo "  4) openai     (GPT, payant)"
 echo "  5) openrouter (multi-modeles, payant)"
-ask "Choix (1-5)" "1" TRANSLATION_CHOICE
+echo "  6) deepseek   (tres bon rapport qualite/prix)"
+echo "  7) minimax    (MiniMax-M1 / m2.7, payant)"
+ask "Choix (1-7)" "1" TRANSLATION_CHOICE
 
 case "$TRANSLATION_CHOICE" in
     1) TRANSLATION_SERVICE="ollama" ;;
@@ -170,12 +172,16 @@ case "$TRANSLATION_CHOICE" in
     3) TRANSLATION_SERVICE="deepl" ;;
     4) TRANSLATION_SERVICE="openai" ;;
     5) TRANSLATION_SERVICE="openrouter" ;;
+    6) TRANSLATION_SERVICE="deepseek" ;;
+    7) TRANSLATION_SERVICE="minimax" ;;
     *) TRANSLATION_SERVICE="ollama" ;;
 esac
 
 DEEPL_API_KEY=""
 OPENAI_API_KEY=""
 OPENROUTER_API_KEY=""
+DEEPSEEK_API_KEY=""
+MINIMAX_API_KEY=""
 
 if [ "$TRANSLATION_SERVICE" = "ollama" ]; then
     ask "URL Ollama" "http://ollama:11434" OLLAMA_BASE_URL
@@ -194,6 +200,14 @@ if [ "$TRANSLATION_SERVICE" = "openrouter" ] || [ "$TRANSLATION_SERVICE" = "all"
     ask "Cle API OpenRouter (laisser vide si pas maintenant)" "" OPENROUTER_API_KEY
 fi
 
+if [ "$TRANSLATION_SERVICE" = "deepseek" ] || [ "$TRANSLATION_SERVICE" = "all" ]; then
+    ask "Cle API DeepSeek (laisser vide si pas maintenant)" "" DEEPSEEK_API_KEY
+fi
+
+if [ "$TRANSLATION_SERVICE" = "minimax" ] || [ "$TRANSLATION_SERVICE" = "all" ]; then
+    ask "Cle API Minimax (laisser vide si pas maintenant)" "" MINIMAX_API_KEY
+fi
+
 # ===========================================
 # ETAPE 6 : Monitoring
 # ===========================================
@@ -291,6 +305,16 @@ OPENAI_API_KEY=${OPENAI_API_KEY}
 OPENAI_MODEL=gpt-4o-mini
 OPENROUTER_API_KEY=${OPENROUTER_API_KEY}
 
+# DeepSeek
+DEEPSEEK_ENABLED=${DEEPSEEK_ENABLED:-false}
+DEEPSEEK_API_KEY=${DEEPSEEK_API_KEY}
+DEEPSEEK_MODEL=deepseek-chat
+
+# Minimax (m2.7 / MiniMax-M1)
+MINIMAX_ENABLED=${MINIMAX_ENABLED:-false}
+MINIMAX_API_KEY=${MINIMAX_API_KEY}
+MINIMAX_MODEL=MiniMax-M1
+
 # Upload
 MAX_FILE_SIZE_MB=50
 ALLOWED_EXTENSIONS=.docx,.xlsx,.pptx