feat: inject global rules into AI system prompt and fix Rules UI seeding

- Load global rules (AIFact/AIMemory) from local CloudModel and inject
  them into the Bedrock/OpenAI system prompt as a '## Global Rules' section
  when memory is enabled.
- Fix rule seeding: always re-seed predefined rules when the CloudModel has
  none, regardless of the has_seeded_predefined_rules flag (handles case
  where flag was set but rules never persisted due to prior missing owner).
- Rename /context slash command to /copy-context: dumps the full context
  window (global rules, progressive summary, message history) to the
  clipboard for debugging.

app/src/ai/openai/translator.rs

@@ -20,6 +20,8 @@ pub struct TranslatorRequest {
     pub tool_result_archive: Vec<ConversationMessage>,
     pub progressive_summary: Option<String>,
     pub messages_sent: Arc<Mutex<Vec<ConversationMessage>>>,
+    /// Global rules (name, content) from the local CloudModel.
+    pub global_rules: Vec<(String, String)>,
 }
 
 pub async fn execute(
@@ -106,7 +108,7 @@ pub async fn execute(
 
     sanitize_messages_for_openai(&mut messages);
 
-    let system_prompt = request_translator::extract_system_prompt(request);
+    let system_prompt = request_translator::extract_system_prompt(request, &params.global_rules);
     let tools = request_translator::extract_tools(request);
 
     log::info!(