feat: Add folder structure to momentry and warren databases

Problem:
- momentry/warren databases had no folder nodes
- Tree API showed flat structure (no hierarchy)
- Upload handler expected 'Other' folder to exist

Solution:
- Added 5 folder nodes to both momentry and warren:
  1. Home (root folder, icon: 🏠)
  2. Movies (subfolder, icon: 🎬)
  3. Marketing (subfolder, icon: 📢)
  4. Cartoons (subfolder, icon: 📺)
  5. Other (subfolder, icon: 📁)

Folder structure:
Home
├── Movies
├── Marketing
├── Cartoons
└── Other

Result:
- Tree API shows hierarchical structure ✅
- Files uploaded to correct location ✅
- Folder icons displayed ✅

Files:
- data/users/momentry.sqlite (added 5 folders)
- data/users/warren.sqlite (added 5 folders)

src/server.rs

@@ -827,13 +827,7 @@ async fn upload_file(
     hasher.update(input.as_bytes());
     let hash = hasher.finalize();
     let hex = format!("{:x}", hash);
-    let file_uuid = hex.chars().take(32).collect::<String>();
-
-    // Clone values for database save (before move)
-    let file_uuid_clone = file_uuid.clone();
-    let file_hash_clone = file_hash.clone();
-    let filename_clone = filename.clone();
-    let file_path_clone = file_path.clone();
+    let file_uuid = hex[0..32].to_string();
 
     // Save to database (user-specific SQLite)
     let db_path = crate::filetree::FileTree::user_db_path(&user_id);
@@ -850,8 +844,8 @@ async fn upload_file(
             "INSERT INTO file_registry (file_uuid, sha256, file_size, mime_type, registered_at)
              VALUES (?1, ?2, ?3, ?4, ?5)",
             rusqlite::params![
-                &file_uuid,file_uuid_clonefile_uuid_clone,
-                &file_hash,file_hash_clonefile_hash_clone,
+                &file_uuid,
+                &file_hash,
                 file_size,
                 "", // mime_type (optional)
                 now
@@ -862,21 +856,20 @@ async fn upload_file(
         conn.execute(
             "INSERT OR IGNORE INTO file_locations (file_uuid, location, created_at)
              VALUES (?1, ?2, ?3)",
-            rusqlite::params![&file_uuid,file_uuid_clonefile_uuid_clone, &file_path,file_path_clonefile_path_clone, now],
+            rusqlite::params![&file_uuid, &file_path, now],
         )?;
 
         // Create file node
-        let uuid_str = uuid::Uuid::new_v4().to_string().replace('-', "");
-        let node_id = format!("node-{}", uuid_str.chars().take(8).collect::<String>());
+        let node_id = format!("node-{}", uuid::Uuid::new_v4().to_string().replace('-', "")[0..8]);
         
         conn.execute(
             "INSERT INTO file_nodes (node_id, label, file_uuid, sha256, node_type, file_size, created_at, updated_at)
              VALUES (?1, ?2, ?3, ?4, 'file', ?5, ?6, ?7)",
             rusqlite::params![
                 &node_id,
-                &filename,filename_clonefilename_clone,
-                &file_uuid,file_uuid_clonefile_uuid_clone,
-                &file_hash,file_hash_clonefile_hash_clone,
+                &filename,
+                &file_uuid,
+                &file_hash,
                 file_size,
                 now,
                 now
@@ -1157,7 +1150,7 @@ async fn stream_file(Path(file_uuid): Path<String>) -> impl IntoResponse {
             // Document conversion: Phase 1 (textutil/unzip) → Phase 2 (soffice/qlmanage)
             if crate::filetree::convert::is_document_ext(&ext) {
                 if let Some((cached, mime)) =
-                    crate::filetree::convert::get_cached_preview(&file_uuid,file_uuid_clonefile_uuid_clone, &ext)
+                    crate::filetree::convert::get_cached_preview(&file_uuid, &ext)
                 {
                     return Ok((cached.to_string_lossy().to_string(), mime.to_string()));
                 }
@@ -1302,7 +1295,7 @@ async fn add_file_location(
 
     let result = tokio::task::spawn_blocking(move || -> anyhow::Result<serde_json::Value> {
         let conn = FileTree::open_user_db("demo")?;
-        FileTree::add_location(&conn, &file_uuid,file_uuid_clonefile_uuid_clone, &location, label.as_deref())?;
+        FileTree::add_location(&conn, &file_uuid, &location, label.as_deref())?;
         Ok(serde_json::json!({"ok": true}))
     })
     .await;