feat(ai): add Xiaomi MiMo provider, ZAI as last-resort fallback

Add MiMo-V2.5-Pro from Xiaomi Token Plan as a new AI provider with
base URL https://token-plan-ams.xiaomimimo.com/v1. The /model change
command now switches between MiniMax and MiMo only. ZAI is always
placed last in the fallback chain as the provider of ultimate resort.
Config panel shows MiniMax and MiMo cards.

💘 Generated with Crush

Assisted-by: GLM-5.1 via Crush <crush@charm.land>

internal/api/handlers_info.go

@@ -530,6 +530,11 @@ func (s *Server) handleProvidersQuota(w http.ResponseWriter, r *http.Request) {
 					}
 				}
 			}
+		case "mimo":
+			q.Healthy = p.APIKey != ""
+			if p.APIKey == "" {
+				q.Error = "no API key"
+			}
 		case "claude", "anthropic":
 			// Claude Code n'a pas d'API externe, vérifier l'installation
 			claudePath := "/usr/bin/claude"

internal/config/config.go

@@ -269,6 +269,12 @@ func Default() *MuyueConfig {
 			BaseURL: "https://api.minimax.io/v1",
 			Active:  true,
 		},
+		{
+			Name:    "mimo",
+			Model:   "MiMo-V2.5-Pro",
+			BaseURL: "https://token-plan-ams.xiaomimimo.com/v1",
+			Active:  false,
+		},
 		{
 			Name:    "zai",
 			Model:   "glm",

internal/orchestrator/orchestrator.go

@@ -476,6 +476,8 @@ func getProviderBaseURL(name string) string {
 		return "https://api.openai.com/v1"
 	case "zai":
 		return "https://api.z.ai/v1"
+	case "mimo":
+		return "https://token-plan-ams.xiaomimimo.com/v1"
 	default:
 		return ""
 	}
@@ -503,11 +505,19 @@ func (o *Orchestrator) sendWithFallback(reqBody ChatRequest, baseURLOverride str
 	if o.provider != nil {
 		providerOrder = append(providerOrder, o.provider)
 	}
+	var zaiProvider *config.AIProvider
 	for _, p := range providers {
 		if o.provider == nil || p.Name != o.provider.Name {
-			providerOrder = append(providerOrder, p)
+			if p.Name == "zai" {
+				zaiProvider = p
+			} else {
+				providerOrder = append(providerOrder, p)
+			}
 		}
 	}
+	if zaiProvider != nil {
+		providerOrder = append(providerOrder, zaiProvider)
+	}
 
 	var lastErr error
 	var triedProviders []string

web/src/components/Config.jsx

@@ -343,7 +343,7 @@ function PanelProviders({ providers, editProvider, providerForm, setProviderForm
     setValidating(null)
   }
 
-  const displayed = providers.filter(p => p.name === 'minimax' || p.name === 'zai')
+  const displayed = providers.filter(p => p.name === 'minimax' || p.name === 'mimo')
 
   return (
     <div className="config-providers-list">

web/src/components/Studio.jsx

@@ -452,15 +452,15 @@ export default function Studio({ api }) {
         api.getProviders().then(data => {
           const providers = data.providers || []
           const minimax = providers.find(p => p.name.toUpperCase() === 'MINIMAX')
-          const zai = providers.find(p => p.name.toUpperCase() === 'ZAI')
-          if (!minimax || !zai) {
-            setMessages(prev => [...prev, { id: Date.now().toString(), role: 'assistant', content: 'MiniMax et ZAI doivent être configurés pour utiliser `/model change`.', time: new Date().toISOString() }])
+          const mimo = providers.find(p => p.name.toUpperCase() === 'MIMO')
+          if (!minimax || !mimo) {
+            setMessages(prev => [...prev, { id: Date.now().toString(), role: 'assistant', content: 'MiniMax et MiMo doivent être configurés pour utiliser `/model change`.', time: new Date().toISOString() }])
             return
           }
           const active = providers.find(p => p.active)
           const activeName = active ? active.name.toUpperCase() : ''
-          const switchTo = activeName === 'MINIMAX' ? 'ZAI' : 'MINIMAX'
-          const target = switchTo === 'MINIMAX' ? minimax : zai
+          const switchTo = activeName === 'MINIMAX' ? 'MIMO' : 'MINIMAX'
+          const target = switchTo === 'MINIMAX' ? minimax : mimo
           api.saveProvider({ name: target.name, active: true }).then(() => {
             setMessages(prev => [...prev, { id: Date.now().toString(), role: 'assistant', content: `✓ Provider changé: **${target.name}** (${target.model})`, time: new Date().toISOString() }])
           }).catch(() => {

web/src/styles/global.css

@@ -155,7 +155,7 @@ input::placeholder { color: var(--text-disabled); }
 .header-clock { font-family: var(--font-mono); font-size: 12px; color: var(--accent); font-weight: 600; }
 
 .content { flex: 1; overflow: hidden; position: relative; }
-.content > div { height: 100%; }
+.content > div { position: absolute; inset: 0; overflow: hidden; }
 .tab-hidden { display: none; }
 
 .statusbar {