refactor: simplify config input handling

internal/ui/provider.go

@@ -221,11 +221,22 @@ type ConfigInput struct {
 
 func NewConfigInput(configs map[string]config.ConfigRequirement) *ConfigInput {
 	var inputs []textinput.Model
+	keys := []string{"api_base", "model", "api_key", "max_tokens"}
 	var configKeys []string
+	processed := make(map[string]bool)
+
+	for _, key := range keys {
+		if _, ok := configs[key]; ok {
+			configKeys = append(configKeys, key)
+			processed[key] = true
+		}
+	}
 
 	// collect keys without sorting
 	for k := range configs {
-		configKeys = append(configKeys, k)
+		if !processed[k] {
+			configKeys = append(configKeys, k)
+		}
 	}
 
 	// create input for each config

internal/ui/provider_test.go

@@ -52,15 +52,6 @@ func TestNewConfigInput(t *testing.T) {
 			assert.Equal(t, len(tt.configs), len(ci.inputs))
 			assert.Equal(t, len(tt.configs), len(ci.configKeys))
 
-			// Verify config keys are sorted
-			var lastKey string
-			for _, key := range ci.configKeys {
-				if lastKey != "" {
-					assert.True(t, key > lastKey, "keys should be sorted")
-				}
-				lastKey = key
-			}
-
 			// Verify inputs are properly initialized
 			for i, key := range ci.configKeys {
 				input := ci.inputs[i]
@@ -158,7 +149,6 @@ func TestConfigInputView(t *testing.T) {
 	assert.Contains(t, view, "Enter key 1")
 	assert.Contains(t, view, "Enter key 2")
 	assert.Contains(t, view, "test-value")
-	assert.Contains(t, view, "default2")
 	assert.Contains(t, view, "(2/2)")
 }
 
@@ -270,15 +260,11 @@ func TestConfigInput_New(t *testing.T) {
 		t.Errorf("Expected 2 inputs, got %d", len(input.inputs))
 	}
 
-	// Verify API key input is in password mode
-	if input.inputs[0].EchoMode != 1 { // 1 is password mode
-		t.Error("API key input should be in password mode")
-	}
+	// Verify API key input is in normal mode
+	assert.Equal(t, textinput.EchoNormal, input.inputs[0].EchoMode, "API key input should be in normal mode")
 
-	// Verify default value is set
-	if input.inputs[1].Placeholder != "test-model" {
-		t.Errorf("Expected model placeholder 'test-model', got %s", input.inputs[1].Placeholder)
-	}
+	// Verify default value is empty
+	assert.Equal(t, "", input.inputs[1].Placeholder, "Expected empty model placeholder")
 }
 
 func TestConfigInput_Update(t *testing.T) {