refactor: modularize server.rs into separate route modules

- Extract scan.rs, files.rs, types.rs, processing.rs, visual_chunk_search.rs
- Move AppState and AppConfig to types.rs
- Each module exposes pub fn xxx_routes() -> Router<AppState>
- server.rs reduced from 5005 to 118 lines (orchestrator only)
- All stubs filled with real implementations from git history
- Verify: cargo check, clippy, tests all pass

src/api/identity_api.rs

@@ -10,7 +10,7 @@ use sqlx::Row;
 
 use crate::core::db::ResourceRecord;
 
-pub fn identity_routes() -> Router<crate::api::server::AppState> {
+pub fn identity_routes() -> Router<crate::api::types::AppState> {
     Router::new()
         .route("/api/v1/files", get(list_files))
         .route("/api/v1/file/:file_uuid", get(get_file_detail))
@@ -65,7 +65,7 @@ pub struct FilesQuery {
 }
 
 async fn list_files(
-    State(state): State<crate::api::server::AppState>,
+    State(state): State<crate::api::types::AppState>,
     Query(params): Query<FilesQuery>,
 ) -> Result<Json<FilesResponse>, (StatusCode, String)> {
     let page = params.page.unwrap_or(1);
@@ -158,7 +158,7 @@ pub struct FileDetailResponse {
 }
 
 async fn get_file_detail(
-    State(state): State<crate::api::server::AppState>,
+    State(state): State<crate::api::types::AppState>,
     Path(file_uuid): Path<String>,
 ) -> Result<Json<FileDetailResponse>, (StatusCode, String)> {
     let file = state
@@ -212,7 +212,7 @@ pub struct FileIdentityItem {
 }
 
 async fn get_file_identities(
-    State(state): State<crate::api::server::AppState>,
+    State(state): State<crate::api::types::AppState>,
     Path(file_uuid): Path<String>,
     Query(params): Query<FilesQuery>,
 ) -> Result<Json<FileIdentitiesResponse>, (StatusCode, String)> {
@@ -300,7 +300,7 @@ fn strip_uuid(u: &uuid::Uuid) -> String {
 }
 
 async fn get_identity_detail(
-    State(state): State<crate::api::server::AppState>,
+    State(state): State<crate::api::types::AppState>,
     Path(identity_uuid): Path<String>,
 ) -> Result<Json<IdentityDetailResponse>, (StatusCode, String)> {
     let uuid_clean = identity_uuid.replace('-', "");
@@ -338,7 +338,7 @@ async fn get_identity_detail(
 }
 
 async fn get_identity_status(
-    State(state): State<crate::api::server::AppState>,
+    State(state): State<crate::api::types::AppState>,
     Path(identity_uuid): Path<String>,
 ) -> Result<Json<IdentityStatusResponse>, (StatusCode, String)> {
     let uuid_clean = identity_uuid.replace('-', "");
@@ -386,7 +386,7 @@ pub struct IdentityFilesResponse {
 }
 
 async fn delete_identity(
-    State(state): State<crate::api::server::AppState>,
+    State(state): State<crate::api::types::AppState>,
     Path(identity_uuid): Path<String>,
 ) -> Result<StatusCode, StatusCode> {
     let table = crate::core::db::schema::table_name("face_detections");
@@ -438,7 +438,7 @@ pub struct IdentityFileItem {
 }
 
 async fn get_identity_files(
-    State(state): State<crate::api::server::AppState>,
+    State(state): State<crate::api::types::AppState>,
     Path(identity_uuid): Path<String>,
     Query(params): Query<FilesQuery>,
 ) -> Result<Json<IdentityFilesResponse>, (StatusCode, String)> {
@@ -524,7 +524,7 @@ pub struct BBox {
 }
 
 async fn get_identity_faces(
-    State(state): State<crate::api::server::AppState>,
+    State(state): State<crate::api::types::AppState>,
     Path(identity_uuid): Path<String>,
     Query(params): Query<FilesQuery>,
 ) -> Result<Json<IdentityFacesResponse>, (StatusCode, String)> {
@@ -608,7 +608,7 @@ pub struct IdentityChunkItem {
 }
 
 async fn get_identity_chunks(
-    State(state): State<crate::api::server::AppState>,
+    State(state): State<crate::api::types::AppState>,
     Path(identity_uuid): Path<String>,
     Query(params): Query<FilesQuery>,
 ) -> Result<Json<IdentityChunksResponse>, (StatusCode, String)> {
@@ -680,7 +680,7 @@ pub struct ResourceItem {
 }
 
 async fn register_resource(
-    State(state): State<crate::api::server::AppState>,
+    State(state): State<crate::api::types::AppState>,
     Json(req): Json<RegisterResourceRequest>,
 ) -> Result<Json<ResourceResponse>, (StatusCode, String)> {
     let resource = ResourceRecord {
@@ -715,7 +715,7 @@ pub struct HeartbeatRequest {
 }
 
 async fn heartbeat_resource(
-    State(state): State<crate::api::server::AppState>,
+    State(state): State<crate::api::types::AppState>,
     Json(req): Json<HeartbeatRequest>,
 ) -> Result<Json<ResourceResponse>, (StatusCode, String)> {
     let status = req.status.unwrap_or("online".to_string());
@@ -733,7 +733,7 @@ async fn heartbeat_resource(
 }
 
 async fn list_resources(
-    State(state): State<crate::api::server::AppState>,
+    State(state): State<crate::api::types::AppState>,
 ) -> Result<Json<ResourceResponse>, (StatusCode, String)> {
     let records = state
         .db
@@ -771,7 +771,7 @@ struct IdentityUploadResponse {
 }
 
 async fn upload_identity(
-    State(state): State<crate::api::server::AppState>,
+    State(state): State<crate::api::types::AppState>,
     Json(payload): Json<crate::core::identity::storage::IdentityFile>,
 ) -> Result<Json<IdentityUploadResponse>, (StatusCode, Json<serde_json::Value>)> {
     let parsed = uuid::Uuid::parse_str(&payload.identity_uuid)
@@ -838,7 +838,7 @@ struct ProfileImageResponse {
 }
 
 async fn upload_profile_image(
-    State(state): State<crate::api::server::AppState>,
+    State(state): State<crate::api::types::AppState>,
     Path(identity_uuid): Path<String>,
     mut multipart: Multipart,
 ) -> Result<Json<ProfileImageResponse>, (StatusCode, Json<serde_json::Value>)> {
@@ -951,7 +951,7 @@ async fn get_profile_image(
 }
 
 async fn get_identity_json(
-    State(state): State<crate::api::server::AppState>,
+    State(state): State<crate::api::types::AppState>,
     Path(identity_uuid): Path<String>,
 ) -> Result<(StatusCode, [(String, String); 1], Vec<u8>), StatusCode> {
     let clean = identity_uuid.replace('-', "");
@@ -1040,7 +1040,7 @@ struct IdentityTextResponse {
 
 /// Path A: Search chunk text → associated identities
 async fn search_identity_text(
-    State(state): State<crate::api::server::AppState>,
+    State(state): State<crate::api::types::AppState>,
     Query(params): Query<IdentityTextQuery>,
 ) -> Result<Json<IdentityTextResponse>, StatusCode> {
     use crate::core::db::schema;
@@ -1148,7 +1148,7 @@ struct IdentitySearchResponse {
 
 /// Path B: Search identity name → associated chunk text
 async fn search_identities_by_text(
-    State(state): State<crate::api::server::AppState>,
+    State(state): State<crate::api::types::AppState>,
     Query(params): Query<IdentitySearchQuery>,
 ) -> Result<Json<IdentitySearchResponse>, StatusCode> {
     use crate::core::db::schema;