feat: Add directory listing functionality

- Add `list_dir` function to `Workspace` struct
- Implement path handling and directory scanning logic
- Refine struct formatting for `Node`, `ComputeSlice`, `StorageSlice`
- Update `StorageSlice.pricing_policy` comment
- Adjust whitespace in CSS styles

lib/develop/heroprompt/heroprompt_workspace.v

@@ -220,6 +220,44 @@ pub:
 	typ  string @[json: 'type']
 }
 
+pub fn (wsp &Workspace) list_dir(rel_path string) ![]ListItem {
+	mut dir := if rel_path.len > 0 {
+		if os.is_abs_path(rel_path) {
+			rel_path
+		} else {
+			os.join_path(wsp.base_path, rel_path)
+		}
+	} else {
+		wsp.base_path
+	}
+
+	if dir.len == 0 {
+		return error('workspace base_path not set')
+	}
+
+	if !os.is_abs_path(dir) {
+		dir = os.join_path(wsp.base_path, dir)
+	}
+
+	entries := os.ls(dir) or { return error('cannot list directory') }
+	mut out := []ListItem{}
+	for e in entries {
+		full := os.join_path(dir, e)
+		if os.is_dir(full) {
+			out << ListItem{
+				name: e
+				typ:  'directory'
+			}
+		} else if os.is_file(full) {
+			out << ListItem{
+				name: e
+				typ:  'file'
+			}
+		}
+	}
+	return out
+}
+
 pub fn (wsp &Workspace) list() ![]ListItem {
 	mut dir := wsp.base_path
 	if dir.len == 0 {

lib/threefold/grid4/datamodel/model_node.v

@@ -78,35 +78,6 @@ pub mut:
 	vcores     int // Total virtual cores
 }
 
-// typically 1GB of memory, but can be adjusted based based on size of machine
-pub struct ComputeSlice {
-pub mut:
-	nodeid                   u32 // the node in the grid, there is an object describing the node
-	id                       int // the id of the slice in the node
-	mem_gb                   f64
-	storage_gb               f64
-	passmark                 int
-	vcores                   int
-	cpu_oversubscription     int
-	storage_oversubscription int
-	price_range              []f64 = [0.0, 0.0]
-	gpus                     u8  // nr of GPU's see node to know what GPU's are
-	price_cc                 f64 // price per slice (even if the grouped one)
-	pricing_policy           PricingPolicy
-	sla_policy               SLAPolicy
-}
-
-// 1GB of storage
-pub struct StorageSlice {
-pub mut:
-	nodeid         u32 // the node in the grid
-	id             int // the id of the slice in the node, are tracked in the node itself
-	price_cc       f64 // price per slice (even if the grouped one)
-	pricing_policy PricingPolicy
-	sla_policy     SLAPolicy
-}
-
-
 fn (mut n Node) check() ! {
 	// todo calculate NodeCapacity out of the devices on the Node
 }

lib/threefold/grid4/datamodel/model_slice_compute.v

@@ -1,7 +1,5 @@
 module datamodel
 
-
-
 // typically 1GB of memory, but can be adjusted based based on size of machine
 @[heap]
 pub struct ComputeSlice {

lib/threefold/grid4/datamodel/model_slice_storage.v

@@ -1,6 +1,5 @@
 module datamodel
 
-
 // 1GB of storage
 @[heap]
 pub struct StorageSlice {
@@ -11,6 +10,3 @@ pub mut:
 	pricing_policy PricingPolicy // copied from node which is part of nodegroup
 	sla_policy     SLAPolicy
 }
-
-
-

lib/web/ui/static/css/main.css

@@ -262,6 +262,7 @@ code {
 
 /* Print styles */
 @media print {
+
   .sidebar,
   .header,
   .theme-toggle {