fix: use provider block's own vision model on legacy fallback

When falling back to a provider block (providerID / legacy ludmila-ai),
prefer the model flagged attachment:true in that block instead of the
Google-default options.model. Prevents sending 'gemini-2.5-flash' to the
ludmila endpoint which expects 'gemini/gemini-2.5-flash'.

package.json

@@ -1,6 +1,6 @@
 {
   "name": "vision-bridge",
-  "version": "0.2.0",
+  "version": "0.2.1",
   "type": "module",
   "description": "Opencode plugin: bridges images to a vision model when the active model cannot see images.",
   "main": "src/vision-bridge.ts",

src/vision-bridge.ts

@@ -147,19 +147,19 @@ export const VisionBridge: Plugin = async (_input: any, options: any = {}) => {
     const pBase = p?.options?.baseURL
     const pKey = p?.options?.apiKey
     if (pBase && pKey) {
-      let pmodel = resolveTemplates(options.model) || ""
-      if (!pmodel) {
-        for (const [id, m] of Object.entries<any>(p?.models ?? {})) {
-          if (m?.attachment === true) {
-            pmodel = typeof m?.id === "string" && m.id ? m.id : id
-            break
-          }
+      // Prefer the provider block's own vision model (attachment: true).
+      // options.model only as a last-resort fallback.
+      let pmodel = ""
+      for (const [id, m] of Object.entries<any>(p?.models ?? {})) {
+        if (m?.attachment === true) {
+          pmodel = typeof m?.id === "string" && m.id ? m.id : id
+          break
         }
       }
       providerInfo = {
         baseURL: String(pBase).replace(/\/$/, ""),
         apiKey: pKey,
-        visionModel: pmodel || DEFAULT_MODEL,
+        visionModel: pmodel || resolveTemplates(options.model) || DEFAULT_MODEL,
       }
       return
     }