Expand agent context API with completed log and calendar view

- Add completed_tasks table to log task completions with title, due date,
  and completion timestamp
- Extend agent context date range: 7 days back to 14 days forward
- Add completed_log to API response (last 50 completed tasks)
- Add day_section field to timeline items (overdue/today/tomorrow/later)
- Add calendar-style view for today's schedule (6am-10pm hourly grid)
- Add tabbed interface for Timeline vs Completed Log in HTML view

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

1 files changed, 12 insertions, 0 deletions

diff --git a/migrations/011_completed_tasks.sql b/migrations/011_completed_tasks.sql
new file mode 100644
index 0000000..0b782e9
--- /dev/null
+++ b/migrations/011_completed_tasks.sql
@@ -0,0 +1,12 @@
+-- Completed tasks log
+CREATE TABLE IF NOT EXISTS completed_tasks (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    source TEXT NOT NULL,           -- 'todoist', 'trello', 'gtasks', 'bug'
+    source_id TEXT NOT NULL,        -- original ID from source
+    title TEXT NOT NULL,
+    due_date TEXT,                  -- original due date
+    completed_at TEXT NOT NULL DEFAULT (datetime('now', 'localtime')),
+    UNIQUE(source, source_id)
+);
+
+CREATE INDEX IF NOT EXISTS idx_completed_tasks_completed_at ON completed_tasks(completed_at);