refactor(#2591): drop the client-side DAG label map — show source + node kinds

Per mara (#2660): the client shouldn't re-derive a friendly name from
node kinds — that re-bakes the domain knowledge the raw-graph redesign
removed. The queue card / hivectl header now shows what the backend sends
(the DAG's source + the raw node kinds); the node chain conveys the
operation. Removes the DagView::label() helper (hivectl was its only
consumer after iris dropped the frontend map in #2660) and points
hivectl's header at d.source instead.

hive-sh4re/src/jobs.rs

@@ -192,32 +192,4 @@ impl DagView {
             State::Done
         }
     }
-
-    /// A short human label for the DAG, derived from its node kinds — the
-    /// shared replacement for the old `Template` wire string now that the kind
-    /// isn't sent. Priority-ordered so the most distinctive node wins (an
-    /// approval deploy reads as "deploy" even though it also rebuilds). Purely
-    /// cosmetic (progress/queue display); consumers that need exactness inspect
-    /// the node kinds directly.
-    #[must_use]
-    pub fn label(&self) -> &'static str {
-        let has = |k: &str| self.nodes.iter().any(|n| n.kind == k);
-        if has("approval_deploy") {
-            "deploy"
-        } else if has("meta_lock") {
-            "meta-update"
-        } else if has("create") || has("provision") {
-            "spawn"
-        } else if has("swap") || has("prebuild") || has("post_swap") {
-            "rebuild"
-        } else if has("write_perm_file") {
-            "perm-change"
-        } else if has("signal") || has("drain") {
-            "graceful"
-        } else if has("set_wanted") || has("stop_for_update") {
-            "power"
-        } else {
-            "reconcile"
-        }
-    }
 }