fix: Add ToSchema derives and register theme endpoints in OpenAPI

- Add utoipa::ToSchema derives to ThemePreset and ThemeColors
- Register get_theme_presets and apply_theme_preset in OpenAPI paths
- Add ThemePresetsResponse and ApplyPresetRequest to OpenAPI schemas
- This enables frontend TypeScript client generation for theme APIs

crates/goose-server/src/openapi.rs

@@ -360,6 +360,8 @@ derive_utoipa!(Icon as IconSchema);
         super::routes::config_management::get_pricing,
         super::routes::config_management::get_theme_variables,
         super::routes::config_management::save_theme,
+        super::routes::config_management::get_theme_presets,
+        super::routes::config_management::apply_theme_preset,
         super::routes::prompts::get_prompts,
         super::routes::prompts::get_prompt,
         super::routes::prompts::save_prompt,
@@ -450,6 +452,10 @@ derive_utoipa!(Icon as IconSchema);
         super::routes::config_management::PricingData,
         super::routes::config_management::ThemeVariablesResponse,
         super::routes::config_management::SaveThemeRequest,
+        super::routes::config_management::ThemePresetsResponse,
+        super::routes::config_management::ApplyPresetRequest,
+        super::theme_presets::ThemePreset,
+        super::theme_presets::ThemeColors,
         super::routes::prompts::PromptsListResponse,
         super::routes::prompts::PromptContentResponse,
         super::routes::prompts::SavePromptRequest,

crates/goose-server/src/theme_presets.rs

@@ -5,8 +5,9 @@
 
 use serde::{Deserialize, Serialize};
 use std::collections::HashMap;
+use utoipa::ToSchema;
 
-#[derive(Debug, Clone, Serialize, Deserialize)]
+#[derive(Debug, Clone, Serialize, Deserialize, ToSchema)]
 pub struct ThemePreset {
     pub id: String,
     pub name: String,
@@ -17,7 +18,7 @@ pub struct ThemePreset {
     pub version: String,
 }
 
-#[derive(Debug, Clone, Serialize, Deserialize)]
+#[derive(Debug, Clone, Serialize, Deserialize, ToSchema)]
 pub struct ThemeColors {
     pub light: HashMap<String, String>,
     pub dark: HashMap<String, String>,