fix: handle Ollama model names case-insensitively

- Store Ollama models with both original and lowercase keys in getOllamaModels
- Update useSelectedModel hook to try case-insensitive lookup for Ollama
- Update NativeOllamaHandler to handle case-insensitive model lookups
- Fixes issue where models like "GPT-OSS:120B" were rejected due to case mismatch

Fixes #9608

src/api/providers/fetchers/ollama.ts

@@ -89,7 +89,14 @@ export async function getOllamaModels(
 							{ headers },
 						)
 						.then((ollamaModelInfo) => {
-							models[ollamaModel.name] = parseOllamaModel(ollamaModelInfo.data)
+							const modelInfo = parseOllamaModel(ollamaModelInfo.data)
+							// Store with original name
+							models[ollamaModel.name] = modelInfo
+							// Also store with lowercase name for case-insensitive lookup
+							const lowerName = ollamaModel.name.toLowerCase()
+							if (lowerName !== ollamaModel.name) {
+								models[lowerName] = modelInfo
+							}
 						}),
 				)
 			}

src/api/providers/native-ollama.ts

@@ -274,9 +274,16 @@ export class NativeOllamaHandler extends BaseProvider implements SingleCompletio
 
 	override getModel(): { id: string; info: ModelInfo } {
 		const modelId = this.options.ollamaModelId || ""
+		// Try exact match first, then lowercase for case-insensitive lookup
+		let modelInfo = this.models[modelId]
+		if (!modelInfo && modelId) {
+			// Try case-insensitive lookup
+			const lowerModelId = modelId.toLowerCase()
+			modelInfo = this.models[lowerModelId]
+		}
 		return {
 			id: modelId,
-			info: this.models[modelId] || openAiModelInfoSaneDefaults,
+			info: modelInfo || openAiModelInfoSaneDefaults,
 		}
 	}
 

webview-ui/src/components/ui/hooks/useSelectedModel.ts

@@ -281,7 +281,13 @@ function getSelectedModel({
 		}
 		case "ollama": {
 			const id = apiConfiguration.ollamaModelId ?? ""
-			const info = ollamaModels && ollamaModels[apiConfiguration.ollamaModelId!]
+			// Try exact match first, then lowercase for case-insensitive lookup
+			let info = ollamaModels && ollamaModels[apiConfiguration.ollamaModelId!]
+			if (!info && ollamaModels && apiConfiguration.ollamaModelId) {
+				// Try case-insensitive lookup
+				const lowerModelId = apiConfiguration.ollamaModelId.toLowerCase()
+				info = ollamaModels[lowerModelId]
+			}
 
 			const adjustedInfo =
 				info?.contextWindow &&