fix: restore go compatibility for runtime models

internal/server/server_test.go

@@ -1,6 +1,7 @@
 package server
 
 import (
+	"database/sql"
 	"encoding/json"
 	"net/http"
 	"net/http/httptest"
@@ -9,6 +10,8 @@ import (
 	"testing"
 
 	"codex-agent-manager/internal/app"
+
+	_ "modernc.org/sqlite"
 )
 
 func TestAgentsEndpointReturnsAgentItems(t *testing.T) {
@@ -117,6 +120,48 @@ func TestRuntimeThreadsEndpointReturnsEmptyWhenSQLiteMissing(t *testing.T) {
 	}
 }
 
+func TestRuntimeThreadsEndpointReturnsPartialSourceEvidence(t *testing.T) {
+	root := t.TempDir()
+	db, err := sql.Open("sqlite", filepath.Join(root, "goals_1.sqlite"))
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer db.Close()
+	if _, err := db.Exec(`CREATE TABLE thread_goals (thread_id TEXT, goal TEXT, status TEXT, updated_at TEXT)`); err != nil {
+		t.Fatal(err)
+	}
+
+	req := httptest.NewRequest(http.MethodGet, "/api/runtime/threads", nil)
+	rec := httptest.NewRecorder()
+	New(app.Config{CodexHome: root, HTTPAddr: "127.0.0.1:0"}).ServeHTTP(rec, req)
+
+	if rec.Code != http.StatusOK {
+		t.Fatalf("status = %d, body = %s", rec.Code, rec.Body.String())
+	}
+	var body struct {
+		Source struct {
+			Kind       string `json:"kind"`
+			Confidence string `json:"confidence"`
+		} `json:"source"`
+		Sources map[string]struct {
+			Kind       string `json:"kind"`
+			Confidence string `json:"confidence"`
+		} `json:"sources"`
+	}
+	if err := json.Unmarshal(rec.Body.Bytes(), &body); err != nil {
+		t.Fatalf("invalid json: %v", err)
+	}
+	if body.Source.Kind != "sqlite_partial" || body.Source.Confidence != "partial" {
+		t.Fatalf("unexpected aggregate source: %#v", body.Source)
+	}
+	if body.Sources["state"].Kind != "sqlite_missing" || body.Sources["state"].Confidence != "low" {
+		t.Fatalf("unexpected state source: %#v", body.Sources["state"])
+	}
+	if body.Sources["goals"].Kind != "sqlite_readonly" || body.Sources["goals"].Confidence != "high" {
+		t.Fatalf("unexpected goals source: %#v", body.Sources["goals"])
+	}
+}
+
 func TestWorkflowEventsEndpointReturnsEvents(t *testing.T) {
 	root := t.TempDir()
 	if err := os.WriteFile(filepath.Join(root, "task_plan.md"), []byte("| 3 | in_progress | Runtime model |\n"), 0o644); err != nil {