Tier 0: render what the services already decided, honestly

Claude-Session: https://claude.ai/code/session_01Ms2FbjQy31TVf3CEvQhGM8

config/dot/quickshell/services/Health.qml

@@ -27,6 +27,61 @@ Singleton {
     property bool postRepairScanPending: false
 
     readonly property bool actionable: root.status === "warning" || root.status === "error"
+
+    // ── The one health verdict ──────────────────────────────────────────────
+    //
+    // The Health page's hero and the Settings sidebar's footer each used to
+    // work this out themselves, and they disagreed about the order of the
+    // first two questions: the hero asked "is the diagnostic unavailable?"
+    // first, the footer asked "have we got any checks?" first. A snapshot
+    // rejected AFTER a good one satisfies both -- checks are still there,
+    // diagnosticUnavailable is true -- so the same desktop was a red "Health
+    // check unavailable" in the hero and a green "Desktop is healthy" in the
+    // footer, at the same time, six inches apart.
+    //
+    // Unavailable comes first because it is the only state that says the other
+    // four are not known to be true. Everything after it describes checks that
+    // actually ran.
+    readonly property string headlineState: {
+        if (root.diagnosticUnavailable)
+            return "unavailable";
+        if (root.checks.length === 0)
+            return "checking";
+        if (root.status === "error")
+            return "error";
+        if (root.status === "warning")
+            return "warning";
+        return "healthy";
+    }
+
+    // Rendered verbatim by both surfaces. The words match the ones
+    // HealthCheckRow puts on an individual check, so "Needs attention" means
+    // the same thing wherever it appears.
+    readonly property string headline: {
+        switch (root.headlineState) {
+        case "unavailable": return "Health check unavailable";
+        case "checking": return "Checking the desktop";
+        case "error": return "Action required";
+        case "warning": return "Needs attention";
+        default: return "Desktop is healthy";
+        }
+    }
+
+    // "danger" | "warn" | "muted" | "ok". Named rather than a colour: Theme is
+    // a UI concern and this is a service.
+    readonly property string tone: {
+        switch (root.headlineState) {
+        case "unavailable":
+        case "error": return "danger";
+        case "warning": return "warn";
+        case "checking": return "muted";
+        default: return "ok";
+        }
+    }
+
+    // How many checks the headline is about. Zero unless something is wrong,
+    // and shared for the same reason the headline is.
+    readonly property int observationCount: root.summary.warnings + root.summary.errors
     readonly property bool busy: scanProcess.running || repairProcess.running
         || singleCheckProcess.running || root.postRepairScanPending
     readonly property string helperPath: Quickshell.env("PANAMA_HEALTH_HELPER")
@@ -569,6 +624,9 @@ Singleton {
             summary: root.summary,
             busy: root.busy,
             diagnosticUnavailable: root.diagnosticUnavailable,
+            headlineState: root.headlineState,
+            headline: root.headline,
+            tone: root.tone,
             queuedRefresh: root.queuedRefresh,
             generation: root.generation,
             acceptedGeneration: root.acceptedGeneration,