Finalized dependency aware scope prop

src/repo_registry/web_ui/views.py

@@ -1619,6 +1619,11 @@ def analysis_run_diff_detail(
             base_analysis_run_id,
             target_analysis_run_id,
         )
+        impact = service.analyze_dependency_impact(
+            repository_id,
+            base_analysis_run_id,
+            target_analysis_run_id,
+        )
     except NotFoundError as exc:
         raise HTTPException(status_code=404, detail=str(exc)) from exc
     display_name = repository_display_name(diff.repository)
@@ -1639,6 +1644,13 @@ def analysis_run_diff_detail(
         </form>
       </div>
     </section>
+    <section class="panel" style="margin-top:18px">
+      <div class="actions">
+        <h2 style="margin-right:auto">Dependency Impact</h2>
+        <a class="button secondary" href="/ui/repos/{repository_id}/dependency-graph?base_analysis_run_id={base_analysis_run_id}&target_analysis_run_id={target_analysis_run_id}">Open Graph</a>
+      </div>
+      {render_dependency_impact_summary(asdict(impact))}
+    </section>
     <div class="grid" style="margin-top:18px">
       <section class="panel">
         <h2>Approved Registry Impact</h2>
@@ -2403,6 +2415,65 @@ def render_diff_section(section: dict) -> str:
     return rendered or '<p class="muted">No differences.</p>'
 
 
+def render_dependency_impact_summary(impact: dict) -> str:
+    impacts = impact.get("impacts", [])
+    metric_row = (
+        f'<span class="pill">{escape(str(impact.get("propagation_breadth", 0)))} impacted</span>'
+        f'<span class="pill">depth {escape(str(impact.get("max_depth", 0)))}</span>'
+        + (
+            '<span class="pill">scope impacted</span>'
+            if impact.get("scope_impacted")
+            else '<span class="pill">scope current</span>'
+        )
+    )
+    changed_facts = impact.get("changed_fact_keys", [])
+    changed_fact_rows = "".join(
+        f'<li class="source">{escape(str(fact_key))}</li>'
+        for fact_key in changed_facts[:8]
+    )
+    changed_fact_note = (
+        f"<ul>{changed_fact_rows}</ul>"
+        if changed_fact_rows
+        else '<p class="muted">No changed facts reached approved characteristics.</p>'
+    )
+    rows = "\n".join(
+        f"""
+        <tr>
+          <td><span class="pill">{escape(str(item.get('item_kind', '')))}</span></td>
+          <td>{escape(str(item.get('name', '')))}</td>
+          <td><span class="pill">{escape(str(item.get('freshness_state', '')))}</span></td>
+          <td>{escape(str(item.get('recommended_action', '')))}</td>
+          <td>{escape(str(item.get('impact_depth', '')))}</td>
+          <td>{render_impact_reasons(item.get('reasons', []))}</td>
+        </tr>
+        """
+        for item in impacts
+    )
+    table = (
+        f"""
+        <table>
+          <thead><tr><th>Kind</th><th>Name</th><th>Freshness</th><th>Action</th><th>Depth</th><th>Why</th></tr></thead>
+          <tbody>{rows}</tbody>
+        </table>
+        """
+        if rows
+        else '<p class="muted">No approved downstream items were marked stale.</p>'
+    )
+    return f"""
+    <div class="actions">{metric_row}</div>
+    <h3>Changed Facts</h3>
+    {changed_fact_note}
+    <h3>Impacted Items</h3>
+    {table}
+    """
+
+
+def render_impact_reasons(reasons: list[str]) -> str:
+    if not reasons:
+        return '<span class="muted">No reason recorded.</span>'
+    return "<br>".join(escape(str(reason)) for reason in reasons[:3])
+
+
 def render_diff_group(items: list[dict], title: str) -> str:
     if not items:
         return ""