When the account owns zero unopened packs, store_catalog() emits a synthetic `mypacks` group placeholder (id 65534, absent from PACK_CATALOG). Change its state from "inactive" to "active".
Root cause (bug 6c): FIFA 17's Store/Scaleform path resolves the `mypacks` category even with zero unopened packs (category chosen client-side via the movie's CATEGORY_ID -> screen+0x290; no server field gates it). CardsDLL FUN_1800147f0 then dereferences the resolved group with no null guard, so an absent group crashes the client (CardsDLL+0x14882, [NULL+0x48], minidump-confirmed). An inactive placeholder avoids the crash but makes the Store report the pack unavailable on entry and bounce to the Hub; an active placeholder lets the Store open normally.
65534 stays economy-safe: pack_by_id() returns None, so store_buy()/purchased_items() cannot open it or grant items/coins, and grant_unopened_pack() rejects it. Explicit selection is rejected client-side ("This pack is no longer available") and sends no backend request. This is a FIFA-17 client-compatibility shim (P2), not an EA-authentic representation, confined to the FIFA-17 backend (not OpenFUT Core). A clean zero-pack UX needs a client-side fix (docs/plans/FIFA17_EMPTY_MYPACKS_CLIENT_FIX.md).
Adds regression tests (test_empty_mypacks.py): empty -> one active 65534 placeholder (absent from PACK_CATALOG); non-empty [70] -> no placeholder, genuine pack shown; economy safety; normal packs 1/5/6/7 untouched.
funman300
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