refactor(simulation): replace ad-hoc system ordering with TickPhase pipeline (#843)

10-phase linear pipeline: PreInput → Input → Movement → Simulation →
Economy → Storyteller → Snapshot → PostSnapshot → Knowledge → TickAdvance.

Each system assigned to exactly one phase via .in_set(TickPhase::X).
Cross-phase .after()/.before() eliminated — only intra-phase ordering
remains. Prevents schedule cycles by construction.

SimulationPlugin refactored into sub-plugins by domain:
  - InputPlugin (player actions, interactions, dialogue dispatch)
  - MovementPlugin (pathfinding, movement validation, spatial indexing)
  - SocialPlugin (conversations, sound, voice enrichment, follow state)
  - EconomyPlugin (tâtonnement tick, IPC query serving)
  - TimePlugin (chunk streaming, news ticker, tick advancement)

All other plugins (NPC, Knowledge, Perception, Storyteller, Settings,
Bridge) updated to use TickPhase assignments instead of cross-plugin
ordering constraints. BridgePlugin trimmed to bridge I/O concerns only.

Part A of #843. Parts B (multi-threaded executor) and C (background
workers) follow.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

server/src/simulation/time_plugin.rs

@@ -0,0 +1,37 @@
+//! Time and streaming plugin — tick advancement, chunk streaming, news ticker.
+//!
+//! Systems span two phases:
+//! - [`TickPhase::PreInput`]: chunk_streaming (loads chunks before input processing)
+//! - [`TickPhase::TickAdvance`]: advance_tick (must be last in the pipeline)
+//! - [`TickPhase::Snapshot`]: tick_news_ticker (assembles display content)
+
+use bevy_app::prelude::*;
+use bevy_ecs::schedule::IntoScheduleConfigs;
+
+use crate::tick_phases::TickPhase;
+
+pub struct TimePlugin;
+
+impl Plugin for TimePlugin {
+    fn build(&self, app: &mut App) {
+        app.init_resource::<super::time::SimulationTime>()
+            .init_resource::<super::chunk_streaming::ChunkLoadRadius>()
+            .init_resource::<super::chunk_streaming::ChunkStreamingCadence>()
+            .init_resource::<super::ticker::TickerPool>()
+            .add_systems(
+                Update,
+                super::chunk_streaming::chunk_streaming
+                    .in_set(TickPhase::PreInput),
+            )
+            .add_systems(
+                Update,
+                super::ticker::tick_news_ticker
+                    .in_set(TickPhase::Snapshot),
+            )
+            .add_systems(
+                Update,
+                super::time::advance_tick
+                    .in_set(TickPhase::TickAdvance),
+            );
+    }
+}