Decouple and fix mistral (#595)

* decouple and fix mistral

* fix wrong variable for currentBaseUrl and buildAPIProviderProperties

src/utils/providerFlag.ts

@@ -7,6 +7,7 @@
  * Usage:
  *   openclaude --provider openai --model gpt-4o
  *   openclaude --provider gemini --model gemini-2.0-flash
+ *   openclaude --provider mistral --model ministral-3b-latest
  *   openclaude --provider ollama --model llama3.2
  *   openclaude --provider anthropic   (default, no-op)
  */
@@ -15,6 +16,7 @@ export const VALID_PROVIDERS = [
   'anthropic',
   'openai',
   'gemini',
+  'mistral',
   'github',
   'bedrock',
   'vertex',
@@ -77,6 +79,13 @@ export function applyProviderFlag(
     }
   }
 
+  delete process.env.CLAUDE_CODE_USE_OPENAI
+  delete process.env.CLAUDE_CODE_USE_GEMINI
+  delete process.env.CLAUDE_CODE_USE_MISTRAL
+  delete process.env.CLAUDE_CODE_USE_GITHUB
+  delete process.env.CLAUDE_CODE_USE_BEDROCK
+  delete process.env.CLAUDE_CODE_USE_VERTEX
+
   const model = parseModelFlag(args)
 
   switch (provider as ProviderFlagName) {
@@ -86,17 +95,22 @@ export function applyProviderFlag(
 
     case 'openai':
       process.env.CLAUDE_CODE_USE_OPENAI = '1'
-      if (model) process.env.OPENAI_MODEL ??= model
+      if (model) process.env.OPENAI_MODEL = model
       break
 
     case 'gemini':
       process.env.CLAUDE_CODE_USE_GEMINI = '1'
-      if (model) process.env.GEMINI_MODEL ??= model
+      if (model) process.env.GEMINI_MODEL = model
+      break
+
+    case 'mistral':
+      process.env.CLAUDE_CODE_USE_MISTRAL = '1'
+      if (model) process.env.MISTRAL_MODEL = model
       break
 
     case 'github':
       process.env.CLAUDE_CODE_USE_GITHUB = '1'
-      if (model) process.env.OPENAI_MODEL ??= model
+      if (model) process.env.OPENAI_MODEL = model
       break
 
     case 'bedrock':
@@ -109,9 +123,13 @@ export function applyProviderFlag(
 
     case 'ollama':
       process.env.CLAUDE_CODE_USE_OPENAI = '1'
-      process.env.OPENAI_BASE_URL ??= 'http://localhost:11434/v1'
-      process.env.OPENAI_API_KEY ??= 'ollama'
-      if (model) process.env.OPENAI_MODEL ??= model
+      if (!process.env.OPENAI_BASE_URL) {
+        process.env.OPENAI_BASE_URL = 'http://localhost:11434/v1'
+      }
+      if (!process.env.OPENAI_API_KEY) {
+        process.env.OPENAI_API_KEY = 'ollama'
+      }
+      if (model) process.env.OPENAI_MODEL = model
       break
   }