Store a target's settings as columns (closes #543)

A target's settings move from the per-type JSON string in
targets.config to columns: url, headers, timeout_seconds,
forward_query, archive_expiry and archive_rotation. A column a type
does not use stays empty. headers holds the header map as JSON text
through GORM's JSON serializer, and archive_expiry holds a
time.Duration, 0 meaning never. The forms check each setting once,
with the same refusals and messages, and the edit form is filled from
the columns, so the per-type config structs, their parsers and the
"could not be read" branches are gone. A delivery task carries the
six settings in place of the JSON string; tests check that each copy
into a task, and back out of one, keeps all six.

Model: opus-5-5

internal/server/alpine_browser_test.go

@@ -1183,16 +1183,26 @@ func checkNewWebhookTargets(
 ) {
 	t.Helper()
 
-	// Each value the pruning choice submits, after an empty one that
-	// stands for archive left off.
-	expiries := []string{
-		"", "never", "1h", "12h", "24h", "720h", "2160h", "8760h",
+	// Each value the pruning choice submits and the expiry it stores,
+	// after an empty one that stands for archive left off.
+	expiries := []struct {
+		value  string
+		stored time.Duration
+	}{
+		{"", 0},
+		{"never", 0},
+		{"1h", time.Hour},
+		{"12h", 12 * time.Hour},
+		{"24h", 24 * time.Hour},
+		{"720h", 720 * time.Hour},
+		{"2160h", 2160 * time.Hour},
+		{"8760h", 8760 * time.Hour},
 	}
 
 	for _, httpURL := range []string{"", publicTargetURL} {
 		for _, expiry := range expiries {
-			name := "url=" + httpURL + " archive=" + expiry
-			want := map[database.TargetType]string{}
+			name := "url=" + httpURL + " archive=" + expiry.value
+			want := map[database.TargetType]database.Target{}
 
 			require.NoError(t, chromedp.Run(
 				ctx,
@@ -1205,10 +1215,12 @@ func checkNewWebhookTargets(
 					"#http_url", httpURL, chromedp.ByQuery,
 				)))
 
-				want[database.TargetTypeHTTP] = `{"url":"` + httpURL + `"}`
+				want[database.TargetTypeHTTP] = database.Target{
+					URL: httpURL, Headers: map[string]string{},
+				}
 			}
 
-			if expiry != "" {
+			if expiry.value != "" {
 				// The choice showing moves Create down, so it is
 				// waited for before Create is clicked.
 				click(ctx, t, archiveBox)
@@ -1216,29 +1228,30 @@ func checkNewWebhookTargets(
 					"%s: checking archive does not show the pruning choice",
 					name)
 				require.NoError(t, chromedp.Run(ctx, chromedp.SetValue(
-					pruningChoice, expiry, chromedp.BySearch,
+					pruningChoice, expiry.value, chromedp.BySearch,
 				)))
 
 				// The rotation choice is left on none.
-				want[database.TargetTypeDatabase] = `{"expiry":"` + expiry +
-					`","rotation":"none"}`
+				want[database.TargetTypeDatabase] = database.Target{
+					ArchiveExpiry: expiry.stored, ArchiveRotation: "none",
+				}
 			}
 
 			clickAndLoad(ctx, t, createButton)
 			require.Truef(t, shown(ctx, `//h1[text()="`+name+`"]`),
 				"%s: the new webhook's page does not open", name)
 
-			assert.Equalf(t, want, targetConfigs(t, env, name),
+			assert.Equalf(t, want, targetSettings(t, env, name),
 				"%s: the webhook does not have the targets asked for", name)
 		}
 	}
 }
 
-// targetConfigs reads the targets of the webhook named name, and
-// returns each one's stored configuration by its type.
-func targetConfigs(
+// targetSettings reads the targets of the webhook named name, and
+// returns each one's stored settings by its type.
+func targetSettings(
 	t *testing.T, env *testEnv, name string,
-) map[database.TargetType]string {
+) map[database.TargetType]database.Target {
 	t.Helper()
 
 	var (
@@ -1251,12 +1264,19 @@ func targetConfigs(
 	require.NoError(t, env.db.DB().
 		Where("webhook_id = ?", webhook.ID).Find(&targets).Error)
 
-	configs := map[database.TargetType]string{}
+	settings := map[database.TargetType]database.Target{}
 	for _, target := range targets {
-		configs[target.Type] = target.Config
+		settings[target.Type] = database.Target{
+			URL:             target.URL,
+			Headers:         target.Headers,
+			TimeoutSeconds:  target.TimeoutSeconds,
+			ForwardQuery:    target.ForwardQuery,
+			ArchiveExpiry:   target.ArchiveExpiry,
+			ArchiveRotation: target.ArchiveRotation,
+		}
 	}
 
-	return configs
+	return settings
 }
 
 // checkRefusedNewWebhook submits the new webhook page with archive