Abbreviate podcast to apod in handle derivation

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

handle.go

@@ -180,6 +180,7 @@ func deriveShortHandle(hostParts []string, path string, maxLen int) string {
 		"environment":             "env",
 		"entertainment":           "ent",
 		"politics":                "pol",
+		"podcast":                 "apod",
 	}
 
 	// Build subdomain
@@ -233,6 +234,7 @@ func extractPathCategory(path string) string {
 	abbrevs := map[string]string{
 		"technology": "tech", "business": "biz", "international": "intl",
 		"environment": "env", "entertainment": "ent", "politics": "pol",
+		"podcast": "apod",
 		"science-and-environment": "sci-env", "entertainment-and-arts": "ent-arts",
 	}
 

handle_test.go

@@ -21,7 +21,7 @@ func TestDeriveHandleFromFeed(t *testing.T) {
 
 		// Canonical URLs from feed link (after crawler extracts them)
 		// "podcast" differentiates podcast-only feeds from main feeds
-		{"calmchristmas.substack.com/podcast", "calmchristmas-substack-com-podcast.1440.news"},
+		{"calmchristmas.substack.com/podcast", "calmchristmas-substack-com-apod.1440.news"},
 		{"calmchristmas.substack.com/feed", "calmchristmas-substack-com.1440.news"},
 	}