merge: integrate main into begin-backlog-task-271

Resolve conflicts from diverged branches:
- api/index.js: include both audio/lyrics (main) and stats (PR) exports
- db/schema.rs: keep play_history migration (PR) and deduplicated_tracks/file_ctime_ns migrations (main)
- lib.rs: register both stats commands (PR) and network cache commands (main)
- Cargo.lock: include both image (PR) and libc (main) dependencies
- Update test_create_all_tables count: 13 tables (play_history in create_tables, deduplicated_tracks via migration only)

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

Author: pythoninthegrass

.claude/skills/repomix-reference-mt/SKILL.md

@@ -0,0 +1,79 @@
+---
+name: repomix-reference-mt
+description: Reference codebase for Mt. Use this skill when you need to understand the structure, implementation patterns, or code details of the Mt project.
+---
+
+# Mt Codebase Reference
+
+523 files | 80557 lines | 741637 tokens
+
+## Overview
+
+Use this skill when you need to:
+- Understand project structure and file organization
+- Find where specific functionality is implemented
+- Read source code for any file
+- Search for code patterns or keywords
+
+## Files
+
+| File | Contents |
+|------|----------|
+| `references/summary.md` | **Start here** - Purpose, format explanation, and statistics |
+| `references/project-structure.md` | Directory tree with line counts per file |
+| `references/files.md` | All file contents (search with `## File: <path>`) |
+| `references/tech-stack.md` | Languages, frameworks, and dependencies |
+
+## How to Use
+
+### 1. Find file locations
+
+Check `project-structure.md` for the directory tree:
+
+```
+src/
+  index.ts (42 lines)
+  utils/
+    helpers.ts (128 lines)
+```
+
+### 2. Read file contents
+
+Grep in `files.md` for the file path:
+
+```
+## File: src/utils/helpers.ts
+```
+
+### 3. Search for code
+
+Grep in `files.md` for keywords:
+
+```
+function calculateTotal
+```
+
+## Common Use Cases
+
+**Understand a feature:**
+1. Search `project-structure.md` for related file names
+2. Read the main implementation file in `files.md`
+3. Search for imports/references to trace dependencies
+
+**Debug an error:**
+1. Grep the error message or class name in `files.md`
+2. Check line counts in `project-structure.md` to find large files
+
+**Find all usages:**
+1. Grep function or variable name in `files.md`
+
+## Tips
+
+- Use line counts in `project-structure.md` to estimate file complexity
+- Search `## File:` pattern to jump between files
+- Check `summary.md` for excluded files, format details, and file statistics
+- Check `tech-stack.md` for languages, frameworks, and dependencies
+
+---
+
+This skill was generated by [Repomix](https://github.com/yamadashy/repomix)