feat(reader): separate Miliastra and track passes as cycles

Route source-classified activities into an independent Miliastra lane and
show dated battle passes once under Cycles. Genshin's About tab can disable
TCG tracking without deleting progress or history.

Activate routing and presentation together so no intermediate version moves
saved progress while still rendering its old owner. Preserve identities,
clock revisions and deletion timestamps across late writes and backups.

docs/DESIGN.md

@@ -705,3 +705,19 @@ legend on the same baseline as "Next: …".
     setup.
   - Continue stays in a fixed place and Back sits beside it. Only a replay ("Replay the
     introduction" in Appearance) has a way out, "Close tour".
+
+## Content tracking additions (2026-11-01)
+
+Genshin's About tab has an Event tracking group before Data sources. The native
+checkbox **Track TCG events** uses the existing settings row, with the copy
+“Show Genius Invokation TCG events in your lists and timeline.” The setting is
+saved immediately; while saving it is disabled, and failure keeps the prior
+value with a visible status message. Nearby copy directs readers to Miliastra's
+own settings. Both interfaces and themes use the same control and tokens.
+
+Miliastra Wonderland is a separate lane, short label Miliastra, with hue
+`#9C83D6`; normal theme contrast resolution applies. Source-backed passes use the
+existing cycle library, progress checkbox, independent pin controls and timeline
+bands. Their boundary captions say “ends”, not “resets”: the next pass is only
+known when a source dates it. Cycle group headers use “Next deadline in” to
+cover passes and resetting routines together.