test(agent-core): treat the general profile prompt as templated

general.md is loaded through systemPromptPath and rendered by renderPrompt,
exactly like system.md, so its {{ ROLE_ADDITIONAL }} and {{ PYTHINKER_SKILLS }}
placeholders are resolved before the model sees them.

Author: elkaix

packages/agent-core/test/prompt-placeholders.test.ts

@@ -23,6 +23,7 @@ const SRC = join(import.meta.dirname, '..', 'src');
 // templated prompt file is introduced.
 const TEMPLATED = new Set([
   'profile/default/system.md',
+  'profile/default/general.md',
   'agent/compaction/compaction-instruction.md',
   'tools/builtin/file/read.md',
   'tools/builtin/file/read-media.md',