fix: stabilize process targeting with search/pinning and fix targeted report data isolation

src-tauri/src/main.rs

@@ -409,22 +409,26 @@ fn generate_report(start_time: DateTime<Utc>, snapshots: Vec<Snapshot>, mode: Pr
         // Targeted mode: Return only the target root(s) and their hierarchy
         let mut targeted_roots = Vec::new();
         if let Some(tpid) = target_pid {
-            // Find target or its closest surviving ancestor/child in the tree
-            // Actually final_roots already contains the full tree.
-            // We want only the root that contains our target PID.
-            fn find_target_node(roots: &mut Vec<AggregatedProcess>, tpid: u32) -> Option<AggregatedProcess> {
-                for i in 0..roots.len() {
-                    if roots[i].pid == tpid {
-                        return Some(roots.remove(i));
+            fn extract_target(nodes: Vec<AggregatedProcess>, tpid: u32) -> (Vec<AggregatedProcess>, Option<AggregatedProcess>) {
+                let mut remaining = Vec::new();
+                let mut found = None;
+                for mut node in nodes {
+                    if node.pid == tpid {
+                        found = Some(node);
+                    } else {
+                        let (new_children, sub_found) = extract_target(node.children, tpid);
+                        node.children = new_children;
+                        if let Some(f) = sub_found {
+                            found = Some(f);
                         }
-                    if let Some(found) = find_target_node(&mut roots[i].children, tpid) {
-                        return Some(found);
+                        remaining.push(node);
                     }
                 }
-                None
+                (remaining, found)
             }
-            if let Some(target_tree) = find_target_node(&mut final_roots, tpid) {
-                targeted_roots.push(target_tree);
+            let (_, target_node) = extract_target(final_roots, tpid);
+            if let Some(t) = target_node {
+                targeted_roots.push(t);
             }
         }