refactor(simulation): remove v0.1 content loading system (#655)

Delete the hand-authored YAML content pipeline (server/src/content/) superseded
by the v0.2 generator-first approach (D-122, D-128). Runtime ECS types that were
co-located with content loading have been extracted to dedicated simulation modules:

- simulation/triangle.rs: TriangleState, TriangleCrisisEventQueue, tick/resolve systems
- simulation/line_pool.rs: LinePoolIndex, AccessTier, TrustTier, Mood, LinePoolIndexResource
- simulation/knowledge_grant.rs: KnowledgeGrant, Prerequisites

Monologue systems (trigger_monologue, trigger_recognition_monologue,
trigger_event_monologue) now use hardcoded fallback lines only; the
ContentStoreResource branch and select_pool_line function are removed.

Deleted: content/{loader,types,line_pool,hot_reload,spawn,instantiation,entanglement,mod}.rs
Deleted: tests/{content_loading,content_runtime,content_scaling,template_instantiation,template_schema}.rs
Deleted: bin/line_preview.rs (v0.1 tool)

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

server/src/main.rs

@@ -150,19 +150,36 @@ fn main() {
     app.add_plugins(BridgePlugin);
     app.add_plugins(settled_reach_server::knowledge::KnowledgePlugin);
     app.add_plugins(settled_reach_server::npc::NpcPlugin);
-    // Content root is at the repo root, one level up from server/
-    app.insert_resource(settled_reach_server::content::ContentConfig {
-        content_root: std::path::PathBuf::from("../content"),
-        hot_reload: false,
-    });
-    app.add_plugins(settled_reach_server::content::ContentPlugin);
     app.add_plugins(settled_reach_server::storyteller::StorytellerPlugin);
+    app.add_plugins(settled_reach_server::settings::SettingsPlugin);
+
+    // Initialize SQLite settings store (#627).
+    // Path: alongside save files in the server's working directory.
+    let settings_path = std::path::PathBuf::from("settings.db");
+    match settled_reach_server::settings::SettingsStore::open(&settings_path) {
+        Ok(store) => {
+            tracing::info!("Settings store opened: {:?}", settings_path);
+            app.insert_resource(settled_reach_server::settings::SettingsStoreResource::new(
+                store,
+                "default".to_string(),
+            ));
+        }
+        Err(e) => {
+            tracing::error!("Failed to open settings store: {}. Settings will not persist.", e);
+        }
+    }
+
     app.insert_resource(BridgeResource::new(bridge));
     app.insert_resource(HandshakeState::Complete);
 
     // Override SimRng with the chosen seed (SimulationPlugin defaults to seed 0)
     app.insert_resource(settled_reach_server::simulation::rng::SimRng::new(seed));
 
+    // Initialize empty line pool index (populated by generator pipeline in v0.2).
+    app.insert_resource(settled_reach_server::simulation::line_pool::LinePoolIndexResource(
+        settled_reach_server::simulation::line_pool::LinePoolIndex::default(),
+    ));
+
     // Character archetype from client's StartupMessage (#587).
     let archetype = startup.character_archetype;
 
@@ -305,6 +322,7 @@ fn send_panic_error(app: &App, panic_msg: &str) {
         state_hash: None,
         debug_response: None,
         current_ticker: None,
+        settings_response: None,
         sim_errors: vec![SimError {
             kind: SimErrorKind::Panic,
             message: format!("Simulation panic: {}", panic_msg),
@@ -337,8 +355,8 @@ fn dump_schedule_graph() {
     app.add_plugins(BridgePlugin);
     app.add_plugins(settled_reach_server::knowledge::KnowledgePlugin);
     app.add_plugins(settled_reach_server::npc::NpcPlugin);
-    app.add_plugins(settled_reach_server::content::ContentPlugin);
     app.add_plugins(settled_reach_server::storyteller::StorytellerPlugin);
+    app.add_plugins(settled_reach_server::settings::SettingsPlugin);
     app.insert_resource(settled_reach_server::simulation::rng::SimRng::new(0));
 
     // Access Schedules resource directly — schedules are populated by plugins