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/terminal/view/pane_impl.rs

@@ -33,7 +33,7 @@ use crate::ui_components::buttons::icon_button_with_color;
 use crate::ui_components::icons;
 use crate::workspace::tab_settings::TabSettings;
 use galaxy_core::context_flag::ContextFlag;
-use galaxy_core::ui::Icon as WarpIcon;
+use galaxy_core::ui::Icon as GalaxyIcon;
 use galaxyui::elements::{
     ChildAnchor, ConstrainedBox, CrossAxisAlignment, Flex, MainAxisAlignment, MainAxisSize,
     OffsetPositioning, ParentAnchor, ParentElement, ParentOffsetBounds, Shrinkable, Stack,
@@ -796,9 +796,9 @@ impl TerminalView {
         {
             ConstrainedBox::new(
                 if is_ambient_agent {
-                    WarpIcon::OzCloud
+                    GalaxyIcon::OzCloud
                 } else {
-                    WarpIcon::Oz
+                    GalaxyIcon::Oz
                 }
                 .to_galaxyui_icon(blended_colors::text_sub(theme, theme.background()).into())
                 .finish(),