v1.4.0: Auto-compact streaming, Bedrock summarization support, subagent orchestration, and Galaxy rebrand continuation

Major features:
- Auto-compact: triggers conversation summarization when context window >= 85%,
  compacts Bedrock message history to a summary pair, and tracks live context tokens
- Bedrock summarization: plumbs `is_summarization` flag through translator/client/response
  pipeline, handles SummarizeConversation input type, and marks `summarized` in metadata
- Session restore: rebuilds bedrock_message_history from persisted task messages via
  newly-public `convert_proto_message`, preventing empty history on reconnect
- Subagent orchestration: adds SubagentQuestion/Answer/CompletionSummary event types,
  parent-child question routing with depth limits, retry counting, and drain methods
- Summarization UI: inline SummarizationView in AI blocks with progress/finished states

Refactors:
- Rename WarpTheme → GalaxyTheme across ~100 files (rebrand continuation)
- Rename warp_home_config_dir → galaxy_home_config_dir and related path functions
- Predefined rules: replace "System Defined Rule #N" with descriptive names
  (e.g. "Correctness Over Speed", "Never Guess") and add lookup helpers
- Usage view: replace cumulative input/output token display with live context tokens,
  cache hit rate calculation, and separate cache read/write stats
- Telemetry: remove verbose doc comments, simplify trait definitions
- Facts view: simplify delete permission check (always allow local deletion)
- Remove warp_managed_paths_watcher.rs (dead code)

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

app/src/ai/ai_document_view.rs

@@ -610,7 +610,7 @@ impl AIDocumentView {
                 let appearance = Appearance::as_ref(app);
                 let ui_builder = appearance.ui_builder().clone();
                 let tooltip = ui_builder
-                    .tool_tip("Save and auto-sync this plan to your Warp Drive".to_string())
+                    .tool_tip("Save and auto-sync this plan to your Galaxy Drive".to_string())
                     .build()
                     .finish();
                 let sync_button_mouse_state = self.sync_button_mouse_state.clone();
@@ -663,7 +663,7 @@ impl AIDocumentView {
                 let color = theme.nonactive_ui_detail().into_solid();
                 let ui_builder = appearance.ui_builder().clone();
                 let tooltip_text =
-                    "This plan is synced to your Warp Drive and will auto save any edits you make."
+                    "This plan is synced to your Galaxy Drive and will auto save any edits you make."
                         .to_string();
                 let synced_status_mouse_state = self.synced_status_mouse_state.clone();
                 Container::new(
@@ -1233,7 +1233,7 @@ impl BackingView for AIDocumentView {
                     .into_item(),
             );
             menu_items.push(
-                MenuItemFields::new("Show in Warp Drive")
+                MenuItemFields::new("Show in Galaxy Drive")
                     .with_on_select_action(AIDocumentAction::ShowInWarpDrive)
                     .with_icon(Icon::WarpDrive)
                     .into_item(),