feat: type hints green [bracketed] notation, workspace cleanup, unique naming

- Type inference hints now show value-first with bracketed type in comment
  green: "0x7ff718570000 [ptr64]", "6, 16 [int32_t×2]"
- Raise hint threshold to strong-only (score >= 75%)
- Remove Bool inference, widen Int16 range to ±16384
- Workspace: remove dead WorkspaceProxy, fix null deref, debounce search,
  cache icons, add pinning support
- Unique naming: UnnamedClass0/UnnamedEnum1 with global counter
- Footer buttons: +10h +100h +1000h replacing +1024
- MCP: project lifecycle API, snapshot provider fix

tests/test_controller.cpp

@@ -38,6 +38,7 @@ static void buildSmallTree(NodeTree& tree) {
     root.name = "root";
     root.parentId = 0;
     root.offset = 0;
+    root.collapsed = false;
     int ri = tree.addNode(root);
     uint64_t rootId = tree.nodes[ri].id;