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/agent_management/notifications/item_rendering.rs

@@ -1,7 +1,7 @@
 use std::sync::Arc;
 
 use galaxy_core::ui::icons::Icon;
-use galaxy_core::ui::theme::{Fill, WarpTheme};
+use galaxy_core::ui::theme::{Fill, GalaxyTheme};
 use galaxyui::clipboard::ClipboardContent;
 use galaxyui::elements::{
     ChildView, ConstrainedBox, Container, CornerRadius, CrossAxisAlignment, DispatchEventResult,
@@ -331,7 +331,7 @@ fn render_timestamp_with_dot(item: &NotificationItem, appearance: &Appearance) -
 fn render_expand_chevron(
     expanded: bool,
     on_click: OnExpandClick,
-    theme: &WarpTheme,
+    theme: &GalaxyTheme,
 ) -> Box<dyn Element> {
     let icon = if expanded {
         Icon::ChevronDown
@@ -411,7 +411,7 @@ const NOTIFICATION_AVATAR_SIZING: IconWithStatusSizing = IconWithStatusSizing {
 fn render_agent_avatar(
     agent: NotificationSourceAgent,
     category: NotificationCategory,
-    theme: &WarpTheme,
+    theme: &GalaxyTheme,
 ) -> Box<dyn Element> {
     let status = notification_category_to_conversation_status(category);
     let variant = match agent {