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/tab_configs/session_config_rendering.rs

@@ -16,7 +16,7 @@ use pathfinder_color::ColorU;
 use pathfinder_geometry::vector::vec2f;
 
 use galaxy_core::ui::theme::Fill;
-use galaxy_core::ui::theme::WarpTheme;
+use galaxy_core::ui::theme::GalaxyTheme;
 
 use crate::appearance::Appearance;
 use crate::tab_configs::session_config::SessionType;
@@ -32,7 +32,7 @@ const PILL_GAP: f32 = 8.;
 fn session_type_item_color(
     is_selected: bool,
     on_accent_bg: bool,
-    theme: &WarpTheme,
+    theme: &GalaxyTheme,
     bg_fill: Fill,
 ) -> ColorU {
     if on_accent_bg {

app/src/tab_configs/session_config_tests.rs

@@ -517,14 +517,14 @@ fn snapshot_2x2_grid() {
 #[test]
 fn snapshot_non_terminal_leaf_replaced_with_terminal() {
     use crate::app_state::NotebookPaneSnapshot;
-    use crate::drive::OpenWarpDriveObjectSettings;
+    use crate::drive::OpenGalaxyDriveObjectSettings;
 
     let notebook_leaf = PaneNodeSnapshot::Leaf(LeafSnapshot {
         is_focused: false,
         custom_vertical_tabs_title: None,
         contents: LeafContents::Notebook(NotebookPaneSnapshot::CloudNotebook {
             notebook_id: None,
-            settings: OpenWarpDriveObjectSettings::default(),
+            settings: OpenGalaxyDriveObjectSettings::default(),
         }),
     });
     let snapshot = PaneNodeSnapshot::Branch(BranchSnapshot {