feat: v0.8.0 — Claude Code subagent capture, own Joplin notebook, git-root repo tags, multi-root scanning

- Subagents: fold Task-tool transcripts (subagents/*.jsonl) inline as
  collapsible <details> blocks at the spawn point; their own tool traffic
  collapses under the same policy; nesting handled via toolUseId matching
- Joplin: Claude Code gets its own top-level AI-ClaudeCode notebook;
  update_note sets parent_id so notes self-heal/relocate on re-sync
- Repo [tags] in titles via git-root detection (nearest .git ancestor),
  home-wide and cross-workspace; CLAUDE_CODE_REPO_TAG_IGNORE escape hatch
- Multi-root scanning: CLAUDE_CODE_DIR as os.pathsep list + CLAUDE_CONFIG_DIR;
  merged by launch-folder, newer-mtime wins on UUID collision
- 298 tests passing

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

tests/test_exporters.py

@@ -17,6 +17,7 @@ from src.blocks import (
     make_file_placeholder,
     make_hidden_context_marker,
     make_image_placeholder,
+    make_subagent_block,
     make_text_block,
     make_thinking_block,
     make_tool_result_block,
@@ -119,6 +120,30 @@ class TestMarkdownFrontmatter:
         assert "```python" in content
         assert "print('hello')" in content
 
+    def test_subagent_block_renders_as_details(self, tmp_path):
+        sub = make_subagent_block(
+            agent_type="Explore",
+            description="find the thing",
+            messages=[
+                {"role": "user", "blocks": [make_text_block("Go find it")]},
+                {"role": "assistant", "blocks": [make_text_block("Found it here.")]},
+            ],
+        )
+        conv = {
+            **SAMPLE_CONV,
+            "provider": "claude-code",
+            "messages": [
+                {"role": "assistant", "content_type": "text", "timestamp": None,
+                 "blocks": [make_text_block("Delegating."), sub]},
+            ],
+        }
+        content = MarkdownExporter(tmp_path).export(conv).read_text()
+        assert "<details>" in content
+        assert "<summary>🤖 Subagent: Explore — find the thing</summary>" in content
+        assert "Go find it" in content
+        assert "Found it here." in content
+        assert "</details>" in content
+
 
 class TestMarkdownFilenameGeneration:
     def test_filename_format(self, tmp_path):