docs: mark completed backlog tasks

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: pythoninthegrass

backlog/tasks/task-110 - P2-Add-sidecar-library-endpoints-scan-list-search.md

@@ -1,10 +1,10 @@
 ---
 id: task-110
 title: 'P2: Add sidecar library endpoints (scan, list, search)'
-status: To Do
+status: Done
 assignee: []
 created_date: '2026-01-12 06:35'
-updated_date: '2026-01-26 01:32'
+updated_date: '2026-01-26 01:53'
 labels:
   - backend
   - python

backlog/tasks/task-113 - P3-Build-Alpine.js-queue-view-component.md

@@ -1,10 +1,10 @@
 ---
 id: task-113
 title: 'P3: Build Alpine.js queue view component'
-status: To Do
+status: Done
 assignee: []
 created_date: '2026-01-12 06:35'
-updated_date: '2026-01-19 00:41'
+updated_date: '2026-01-26 01:53'
 labels:
   - frontend
   - alpine

backlog/tasks/task-114 - P3-Build-Alpine.js-player-controls-component.md

@@ -1,10 +1,10 @@
 ---
 id: task-114
 title: 'P3: Build Alpine.js player controls component'
-status: To Do
+status: Done
 assignee: []
 created_date: '2026-01-12 06:35'
-updated_date: '2026-01-19 00:41'
+updated_date: '2026-01-26 01:53'
 labels:
   - frontend
   - alpine