Add Storm and Spice Blow practice

Expand the interactive introduction to thirteen lessons and eleven Basic examples. Separate storm sealing, reveal and movement; compare first-turn and later-turn ranges, wraparound, exposure and shelter. Offer four spice sequences for accumulation, storm loss, later worms and first-turn worm return, with Nexus opening only after the replacement blow finishes. Reuse existing card inspection and preserve all previous lesson identities and results through version 6 migration.

Extract unchanged storm-sector, exposure, worm-protection and spice-placement calculations into a focused module shared by engine, preflight and teaching. Existing battle-wheel defaults stay intact while storm practice supplies its minimum and accessible label. No live state schema, rules interpretation, mode gate or AI strategy changes.

All 4954 offline tests, types, lint and production build pass on stable final source. Focused tests compare all 24 offered storm dials and four spice cases with actual engine actions, verify exact ignored-worm return, and exercise every saved stage and v1–v5 migration. Independent review found no material findings. Earlier broad runs passed but were invalidated by a final rules-copy clarification and migration documentation correction; final3 verifies the stable source.

Browser checks retain the earlier Fremen revival outcome after migration, restore a sealed storm and completed Nexus across refresh, verify wrap/shelter/zero movement, exercise all four spice cases and inspect the revealed worm. Mobile controls and modal fit 390px; Escape restores the trigger. Screenshot capture remains unavailable. Full faction, Fremen-ride, Advanced/expansion teaching and complete game acceptance remain open.

All 1373 rooms, 2883 seats and auxiliary rows remain unchanged; SQLite integrity and foreign keys pass. Server reused without restart. HTTP tests not repeated because HTTP, auth, persistence and state shape are unchanged.

Private evidence: 20260921-opening-phase-practice.
Verified source tree: 6bd333ec6938904b31523f8b20042e516ba55b6ac4c63973e5bb7ee74baa71fb

docs/CURRENT_STATUS.md

@@ -6,28 +6,26 @@ gated.** Prototypes do not open completion or publication gates.
 
 ## Current checkpoint and work
 
-Latest delivered checkpoint: `ed53eb7`, [Storm Card inspection](STORM_CARD_INSPECTION.md).
-Types, lint, **4,946 offline tests**, production build and **46 HTTP tests** passed.
-All 1,337 original rooms, 2,805 original seats and existing auxiliary rows stayed
-unchanged; HTTP checks created their own additional records. The current baseline
-contains 1,373 rooms and 2,883 seats. The running server was reused.
-Earlier delivered checkpoints include `67e429e` for Charity/Revival practice,
-`c4ff75a` for alliances, `b7ec940` for bidding, `b9718ac` for lobby AI configuration
-and `b21b2bc` for one-use AI permission. The `8f7a62c` policy checkpoint removed
-the usage cutoff and deferred AI refinement until feature completion, with three
-adjacent 75% targets. See the [implementation history](IMPLEMENTATION_STATUS.md).
+Latest delivered checkpoint: `66c41b2`, [Kwisatz Haderach inspection](KWISATZ_INSPECTION.md).
+Types, lint, **4,950 offline tests** and production build passed. All 1,373 rooms,
+2,883 seats and existing auxiliary rows stayed unchanged. The running server was
+reused. Earlier checkpoints include `ed53eb7` for Storm Cards, `67e429e` for
+Charity/Revival practice, `c4ff75a` for alliances, `b7ec940` for bidding,
+`b9718ac` for lobby AI configuration and `b21b2bc` for one-use AI permission.
+The `8f7a62c` policy checkpoint removed the usage cutoff and deferred AI refinement
+until feature completion, with three adjacent 75% targets. See the
+[implementation history](IMPLEMENTATION_STATUS.md).
 
-Current work: [Kwisatz Haderach inspection](KWISATZ_INSPECTION.md) connects an
-original companion face, private battle-loss progress and availability guidance,
-authorized private/public plan components and a static internal reference.
-Rules calculations, sealed choices, save shape and mode gates remain unchanged.
-Source-bound checks, independent review, browser and preservation/Git evidence
-belong to the private checkpoint. Full Advanced acceptance, exact manufactured
-component verification and the remaining component inventory are unfinished.
+Current work: [Storm and Spice Blow practice](INTERACTIVE_INTRODUCTION.md) expands
+the introduction to thirteen lessons and eleven independent Basic examples.
+Sealed dials, reveal, sector traversal, shelter, spice accumulation/storm loss,
+first-turn worm return and later-worm Nexus timing reuse shared live calculations.
+Version 6 preserves old lesson identities and outcomes. Full faction, Fremen-ride,
+Advanced and expansion teaching remain unfinished. Source-bound checks, review,
+browser and preservation/Git evidence belong to the private checkpoint.
 A bounded Duke review confirmed revival/loan paths still cross recorded custody,
 return and cycle questions; no duplicate ruling or invented outcome was added.
-Storm/spice-blow teaching, full faction/Advanced/expansion teaching and broader
-multiplayer acceptance remain unfinished.
+Broader multiplayer and component acceptance remain unfinished.
 
 A bounded remaining-effect audit found that the reviewed faction/Nexus candidates
 still cross recorded pending rulings. Continue independent features rather than