Add HTML5 flowchart depth controls

services/api-server/src/api_server/html5.py

@@ -252,11 +252,11 @@ def render_html5_flowchart(
     flowchart: object | None,
     *,
     focus: str | None = None,
+    depth: int = 1,
     oob: bool = False,
 ) -> str:
-    hx_url = f"/html5/projects/{quote(project_id)}/flowchart"
-    if focus:
-        hx_url = f"{hx_url}?focus={quote(focus, safe='')}"
+    normalized_depth = min(max(depth, 1), 3)
+    hx_url = _flowchart_url(project_id, focus, normalized_depth)
     oob_attr = ' hx-swap-oob="outerHTML"' if oob else ""
     if flowchart is None:
         return f"""
@@ -290,6 +290,7 @@ def render_html5_flowchart(
       {oob_attr}
     >
       <div class="panel-title">Карта связей · {escape(mode)}</div>
+      {_flowchart_depth_actions(project_id, focus, normalized_depth)}
       <dl class="report-grid">
         {_metric("Nodes", len(nodes))}
         {_metric("Edges", len(edges))}
@@ -1750,6 +1751,34 @@ def _flowchart_edge_item(edge: object, nodes: Iterable[object]) -> str:
     """
 
 
+def _flowchart_url(project_id: str, focus: str | None, depth: int) -> str:
+    params = []
+    if focus:
+        params.append(f"focus={quote(focus, safe='')}")
+    params.append(f"depth={depth}")
+    return f"/html5/projects/{quote(project_id)}/flowchart?{'&'.join(params)}"
+
+
+def _flowchart_depth_actions(project_id: str, focus: str | None, active_depth: int) -> str:
+    buttons = []
+    for depth in [1, 2, 3]:
+        active = ' aria-current="page" data-html5-object-action-active="true"' if depth == active_depth else ""
+        url = _flowchart_url(project_id, focus, depth)
+        buttons.append(
+            f"""
+            <a
+              class="button"
+              href="{url}"
+              hx-get="{url}"
+              hx-target="[data-html5-flowchart]"
+              hx-swap="outerHTML"
+              {active}
+            >Depth {depth}</a>
+            """
+        )
+    return f'<nav class="object-actions" data-html5-flowchart-actions>{"".join(buttons)}</nav>'
+
+
 def _flowchart_node_item(node: object) -> str:
     name = str(getattr(node, "qualified_name", "") or getattr(node, "label", "") or "node")
     kind = str(getattr(node, "kind", "") or "NODE")