feat: add model run comparison

apps/web/src/lib/api.ts

@@ -273,6 +273,23 @@ export type AreaScoreModelRunResponse = {
   scores: AreaScore[];
 };
 
+export type AreaScoreRunDiffItem = {
+  area_id: string;
+  name: string;
+  district: string;
+  base_score: number | null;
+  candidate_score: number | null;
+  score_delta: number | null;
+  base_recommendation: string | null;
+  candidate_recommendation: string | null;
+};
+
+export type AreaScoreRunDiff = {
+  base_run: ModelRun;
+  candidate_run: ModelRun;
+  items: AreaScoreRunDiffItem[];
+};
+
 export type AreaScoreLineage = {
   area_id: string;
   area_name: string;
@@ -527,6 +544,29 @@ export async function createAreaScoreModelRun(
   });
 }
 
+export async function fetchModelRuns(filters: {
+  model_name?: string;
+  target_month?: string;
+} = {}): Promise<ModelRun[]> {
+  const params = new URLSearchParams();
+  for (const [key, value] of Object.entries(filters)) {
+    if (value) {
+      params.set(key, value);
+    }
+  }
+  const query = params.toString();
+  return fetchJson(`/api/v1/model-runs${query ? `?${query}` : ""}`);
+}
+
+export async function fetchAreaScoreRunDiff(
+  baseRunId: number,
+  candidateRunId: number,
+): Promise<AreaScoreRunDiff> {
+  return fetchJson(
+    `/api/v1/model-runs/area-scores/diff?base_run_id=${baseRunId}&candidate_run_id=${candidateRunId}`,
+  );
+}
+
 export async function fetchAreaScoreLineage(
   areaId: string,
   month: string,