feat(simulation): sprint 16 dialogue server — response handler, trust gossip, variety tracker

Move dialogue system registrations from BridgePlugin to NpcPlugin (#538):
game logic that depends on NPC-layer resources now registers where it
belongs. BridgePlugin retains only wire protocol concerns.

Implement DialogueResponse verb handler (#539): new process_dialogue_response
system runs the full D-028 four-layer pipeline to select follow-up lines
when the player picks a dialogue option. Clears ActiveDialogue when no
candidates remain. Fix latent schedule ambiguity — emit_observation_events
now has explicit .before(advance_tick) constraint.

Verify trust-gated gossip pipeline (#171): confirmed process_talk_interaction
correctly passes KnowledgeConfidence through relationship_to_trust() per
D-075. Added integration tests for Secret-tier access (Friendly+KnowsDetails)
and Surface-only fallback (Friendly+Suspects).

Wire DialogueCooldownTracker into selection (#338): added regression test
confirming no line_id repeats within the 600-tick cooldown window across
10 consecutive Talk interactions.

Closes #538, #539, #171, #338

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

server/src/bridge/mod.rs

@@ -178,13 +178,6 @@ impl Plugin for BridgePlugin {
                         .after(crate::simulation::sound::collect_sound_events)
                         .after(crate::simulation::conversation::run_npc_conversations)
                         .after(crate::simulation::dialogue::process_walk_away),
-                    crate::simulation::dialogue::process_talk_interaction
-                        .after(crate::simulation::input::process_player_input),
-                    crate::simulation::dialogue::process_walk_away
-                        .after(crate::simulation::input::process_player_input)
-                        .after(crate::simulation::dialogue::process_talk_interaction),
-                    crate::simulation::dialogue::process_confrontation_response
-                        .after(crate::simulation::input::process_player_input),
                     crate::simulation::follow::update_follow_state
                         .after(crate::perception::observer::compute_visibility_geometry)
                         .after(crate::simulation::movement::validate_movement)
@@ -195,9 +188,11 @@ impl Plugin for BridgePlugin {
                         .after(crate::simulation::monologue::trigger_event_monologue)
                         .after(crate::simulation::dialogue::process_talk_interaction)
                         .after(crate::simulation::dialogue::process_confrontation_response)
+                        .after(crate::simulation::dialogue::process_dialogue_response)
                         .before(crate::simulation::time::advance_tick),
                     crate::perception::observation::emit_observation_events
-                        .after(crate::perception::observer::compute_observer_snapshot),
+                        .after(crate::perception::observer::compute_observer_snapshot)
+                        .before(crate::simulation::time::advance_tick),
                     send_bridge_snapshot
                         .after(crate::perception::observer::compute_observer_snapshot),
                 ),

server/src/bridge/types.rs

@@ -377,6 +377,13 @@ pub enum PlayerAction {
     /// Clears dialogue, monologue, and interaction buffers.
     /// Rejected with a log warning on non-Gauntlet maps.
     TeleportToHub,
+    /// Player chose a dialogue option (#539, D-028 follow-up).
+    /// response_id is the line_id that was displayed; target_entity_id is the NPC's wire ID.
+    /// Server runs the same 4-layer pipeline to select a follow-up line.
+    DialogueResponse {
+        target_entity_id: u64,
+        response_id: String,
+    },
 }
 
 impl PlayerAction {