[squad:plan] Morrow Mosaic — M3 Art & Content Pass: "City in Color" (Art/Narrative)

**Owner:** Verbal (Docs/Narrative/Art coordination)

Part of parent tracking issue #57426 for the game concept **Morrow Mosaic**.

## Goals
- Expand to all MVP districts and fragment set
- Replace placeholder visuals with production art
- Add event variety, dilemmas, and narrative flavor text
- Tune balance for readable tradeoffs and replayability
- Improve onboarding and mid-game complexity ramp

## Acceptance Criteria
- All 3–4 MVP districts have production-quality art and unique fragment sets
- Narrative flavor text present for all fragment types and city events
- New-player onboarding flow tested for clarity

Start with parent tracking issue #57426 and the Morrow Mosaic project context; the payload names no implementation files, tests, or entry points. Define the art, narrative, balance, and onboarding work against the listed goals, with completion measured by the three acceptance criteria for MVP districts, fragment and event text, and tested onboarding clarity.

Written by the indexing model from the issue text.