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/conversation_status_ui.rs

@@ -1,6 +1,6 @@
 use galaxy_core::ui::appearance::Appearance;
 use galaxy_core::ui::color::coloru_with_opacity;
-use galaxy_core::ui::theme::{Fill, WarpTheme};
+use galaxy_core::ui::theme::{Fill, GalaxyTheme};
 use galaxyui::color::ColorU;
 use galaxyui::elements::{ConstrainedBox, Container, CornerRadius, Radius};
 use galaxyui::Element;
@@ -13,17 +13,17 @@ use crate::ui_components::icons::Icon;
 pub const STATUS_ELEMENT_PADDING: f32 = 2.;
 
 pub trait StatusElementStyle {
-    fn status_icon_and_color(&self, theme: &WarpTheme) -> (Icon, ColorU);
+    fn status_icon_and_color(&self, theme: &GalaxyTheme) -> (Icon, ColorU);
 }
 
 impl StatusElementStyle for ConversationStatus {
-    fn status_icon_and_color(&self, theme: &WarpTheme) -> (Icon, ColorU) {
+    fn status_icon_and_color(&self, theme: &GalaxyTheme) -> (Icon, ColorU) {
         ConversationStatus::status_icon_and_color(self, theme)
     }
 }
 
 impl StatusElementStyle for AgentRunDisplayStatus {
-    fn status_icon_and_color(&self, theme: &WarpTheme) -> (Icon, ColorU) {
+    fn status_icon_and_color(&self, theme: &GalaxyTheme) -> (Icon, ColorU) {
         AgentRunDisplayStatus::status_icon_and_color(self, theme)
     }
 }