fix!(lua.endpoints): skip-opened tag packs are a dead zone — no-op picks, missing dealt hand, hangs that break the session

## Description

Packs opened from skip tags at `BLIND_SELECT` misbehave over RPC in three ways.
All three are fine in the vanilla UI; all three were reproduced with a
differential harness replaying identical traces on a vanilla-faithful simulator.

1. **Silent no-op pick.** `pack` returned success for a pick from a skip-opened
Celestial pack, but nothing happened on live: the pack still had all its
cards, the planet was unused, no hand was leveled (seed `LS5HXL62`, step 28).
2. **No dealt hand for Arcana/Spectral tag packs.** Vanilla deals a targeting
hand when these packs open; over RPC at blind select, both sides sit in
`SMODS_BOOSTER_OPENED` but live's hand stays empty with an untouched deck
(seeds `LSMWZ3M4` step 21, `LSDTVEW6` step 27). In our census across ~400
organic games, **every** skip-opened tag pack either diverged or had to be
truncated — the flow is a complete dead zone.
3. **Hang with lasting damage.** Stacked tag packs (Double Tag + a pack tag)
hang the `pack` endpoint — related to but distinct from the triggers in #198
and #199. Worse, after the hang the game's event processing stays broken for
the remainder of the run even though `gamestate` still reads consistent
(probed directly: a round-end mechanic that reliably fired in a fresh session
stopped firing after the hang, with all RNG streams still matching).

Suspected root cause: the SMODS booster flow at blind select diverges from the
shop pack flow the endpoints were built around (cf. #202, which covers use/sell
during `SMODS_BOOSTER_OPENED`).

## Impact

Skipping a blind for a pack tag is one of the stronger lines in the game.
Over RPC it currently either loses the pack contents silently (worst case for a
bot: the pick "succeeds") or kills the session. Our harness had to veto all
pack-tag skips to keep runs alive, which removes a real strategy from any bot
that wants to be faithful.

## Suggested Fix

- `pack` should verify the pick actually applied (pack card count / target area
changed) before reporting success, and return an error otherwise.
- Deal the targeting hand for Arcana/Spectral tag packs the way the shop flow
does, or reject the open with a clear error instead of hanging.

Repro bundles available for all seeds cited.