Add confirmed project deletion

docs/ARCHITECTURE.md

@@ -31,7 +31,7 @@ macOS App
 ├── Integrations
 │   └── OpenAI
 └── Persistence
-    └── Local project/version storage
+    └── Local project/version storage and deletion
 ```
 
 ## AI Director

docs/PRODUCT.md

@@ -78,7 +78,8 @@ are not part of the current product requirement.
 ## Project Management
 
 Every song is stored as a project. Important changes can create versions
-so previous states remain recoverable.
+so previous states remain recoverable. A project can be deleted after
+explicit user confirmation.
 
 ## AI Rules
 

docs/TASKS.md

@@ -127,3 +127,7 @@ automatically configure the agreed song parameters, generate/edit lyrics
 and song planning through OpenAI, select instruments, review
 the complete project, save versions, and retain the approved final
 lyrics and style prompt in the project.
+
+## Current Improvements
+
+-   [x] Add confirmed project deletion from the project browser.