feat(simulation): auto-pause sim on implant-fullscreen — inspection substrate (T-970)

D-226 layer 1. World-advancing phases gated on pause: Movement/Storyteller/Knowledge/TickAdvance set-gated via sim_not_paused; Simulation + Economy gated per-system at their registration sites — collect_sound_events and serve_econ_state_query stay unconditioned (transient-buffer clear + paused-allowed query; set-gating Simulation leaked a stale tick-7 footstep into frozen snapshots — caught by golden_suite, fixed without touching the fixture; regression test encodes the bug shape). New PlayerAction::AutoPause/AutoResume + AutoPauseState resource implement Option A reconciliation: auto-resume only fires if auto-pause caused the pause; manual pause and Half rate survive implant open/close. PauseParams SystemParam bundle keeps process_player_input under the 16-param ceiling (BookmarkInputParams precedent). Client: HudGroups.gameplay_occluded now sends AutoPause/AutoResume via send_named_action; 5 gdUnit tests + 7 Rust tests.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

server/src/simulation/social_plugin.rs

@@ -1,10 +1,20 @@
 //! Social simulation plugin — NPC knowledge transfer, disclosure, and social systems.
 //!
 //! All systems run in [`TickPhase::Simulation`].
+//!
+//! T-970 (D-226 layer 1): `TickPhase::Simulation` is NOT set-gated while the
+//! sim is paused — `collect_sound_events` must keep running every tick
+//! regardless (see its own `.run_if`-free registration below and the doc
+//! comment on `tick_phases::TickPhase::configure`). Every other system in
+//! this phase IS individually gated with `sim_not_paused`, collectively via
+//! the tuple's own `.run_if()` (safe here because collect_sound_events isn't
+//! part of that tuple — the anonymous-set-wrapping this creates only affects
+//! the gated group, not the always-on system).
 
 use bevy_app::prelude::*;
 use bevy_ecs::schedule::IntoScheduleConfigs;
 
+use crate::simulation::time::sim_not_paused;
 use crate::tick_phases::TickPhase;
 
 pub struct SocialPlugin;
@@ -15,11 +25,34 @@ impl Plugin for SocialPlugin {
             .init_resource::<super::follow::FollowEndEventQueue>()
             .init_resource::<super::monologue::PostConversationQueue>()
             .init_resource::<super::poi_discovery::PoiDiscoveryEventQueue>()
+            // collect_sound_events: NEVER gated (T-970). It only clears-then-
+            // refills the this-tick SoundEventQueue from SoundEventEmitter
+            // components — compute_observer_snapshot (Snapshot phase,
+            // ungated) peeks that queue via Res every tick without draining
+            // it itself, so skipping this system while paused would leave
+            // stale sound events visible in every snapshot taken while
+            // frozen (confirmed by tests/golden_suite.rs going red when this
+            // was gated as part of the whole Simulation set).
+            //
+            // Deliberate, documented semantics (do not "fix" this later):
+            // with collect_sound_events left unconditioned, the FIRST paused
+            // tick clears the queue and no gated producer re-emits into it
+            // (movement/dialogue/etc. that would populate SoundEventEmitter
+            // are all frozen), so every snapshot served while paused shows
+            // sound_events: [] — a stable, silent, frozen inspection view
+            // one tick after the pause takes effect. This matches D-226's
+            // "inspection substrate" intent (sound is an instantaneous
+            // event, not persistent world state, so a frozen view showing
+            // none is correct) rather than replaying/holding the last sound
+            // indefinitely while paused.
+            .add_systems(
+                Update,
+                super::sound::collect_sound_events.in_set(TickPhase::Simulation),
+            )
             .add_systems(
                 Update,
                 (
                     super::npc_knowledge_transfer::transfer_npc_knowledge,
-                    super::sound::collect_sound_events,
                     // Voice enrichment (D-138) — rewrite NPC text with voiced variants.
                     // No-op when VoiceCacheResource is absent.
                     crate::voice::integration::voice_enrich_dialogue_response,
@@ -34,6 +67,7 @@ impl Plugin for SocialPlugin {
                     // Triangle escalation (#250) — runs on game-minute boundaries
                     super::triangle::tick_triangle_escalation,
                 )
+                    .run_if(sim_not_paused)
                     .in_set(TickPhase::Simulation),
             );
     }