chore(dist): compile PRs #56/#57/#58 into soul.c

- PR #56: vision in agentic chat path (image content block)
- PR #57: /api/connectors/call route — proxy connector tool calls
- PR #58: /api/neuron/list/<type> off-by-one fix (str_slice 16->17)

Live-verified: list/BacklogItem returns 50 nodes (was 0 before #58 fix).
Binary size: 3.8MB.

dist/routes.c

@@ -163,11 +163,6 @@ el_val_t session_update_patch(el_val_t session_id, el_val_t body);
 el_val_t session_search(el_val_t query);
 el_val_t session_hist_load(el_val_t session_id);
 el_val_t session_hist_save(el_val_t session_id, el_val_t hist);
-el_val_t init_soul_edges(void);
-el_val_t load_identity_context(void);
-el_val_t seed_persona_from_env(void);
-el_val_t emit_session_start_event(void);
-el_val_t layered_cycle(el_val_t raw_input);
 el_val_t rate_limit_check(el_val_t ip, el_val_t path);
 el_val_t strip_query(el_val_t path);
 el_val_t err_404(el_val_t path);
@@ -405,6 +400,9 @@ el_val_t handle_connectors(el_val_t method, el_val_t clean, el_val_t body) {
   if (str_eq(clean, EL_STR("/api/connectors/oauth/start"))) {
     return connectd_post(EL_STR("/mcp/oauth/start"), body);
   }
+  if (str_eq(clean, EL_STR("/api/connectors/call"))) {
+    return connectd_post(EL_STR("/mcp/call"), body);
+  }
   return EL_STR("{\"ok\":false,\"error\":\"unknown connectors route\"}");
   return 0;
 }
@@ -513,7 +511,7 @@ el_val_t handle_request(el_val_t method, el_val_t path, el_val_t body) {
       return handle_api_inspect_graph(method, path, body);
     }
     if (str_starts_with(clean, EL_STR("/api/neuron/list/"))) {
-      el_val_t node_type = str_slice(clean, 16, str_len(clean));
+      el_val_t node_type = str_slice(clean, 17, str_len(clean));
       return handle_api_list_typed(node_type, path, body);
     }
     if (str_starts_with(clean, EL_STR("/api/neuron/recall"))) {