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/workspace/view/global_search/view.rs

@@ -1074,7 +1074,7 @@ impl GlobalSearchView {
         directory_path: &Path,
         matched_path: &MatchedPath,
         appearance: &Appearance,
-        theme: &galaxy_core::ui::theme::WarpTheme,
+        theme: &galaxy_core::ui::theme::GalaxyTheme,
         app: &AppContext,
     ) -> Box<dyn Element> {
         let is_selected = self.is_row_at_index_selected(index);
@@ -1249,7 +1249,7 @@ impl GlobalSearchView {
         matched: &Match,
         match_index: usize,
         appearance: &Appearance,
-        theme: &galaxy_core::ui::theme::WarpTheme,
+        theme: &galaxy_core::ui::theme::GalaxyTheme,
     ) -> Box<dyn Element> {
         let is_selected = self.is_row_at_index_selected(index);
         let line_number = matched.line_number;
@@ -1853,7 +1853,7 @@ impl GlobalSearchView {
         index: usize,
         dir_entry: &DirectoryEntry,
         appearance: &Appearance,
-        theme: &galaxy_core::ui::theme::WarpTheme,
+        theme: &galaxy_core::ui::theme::GalaxyTheme,
     ) -> Box<dyn Element> {
         let is_selected = self.is_row_at_index_selected(index);
         let mouse_state = dir_entry.mouse_state.clone();