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/search/welcome_palette/view.rs

@@ -48,7 +48,7 @@ use crate::send_telemetry_from_ctx;
 use crate::server::{ids::SyncId, telemetry::TelemetryEvent};
 use crate::settings::AISettings;
 use crate::terminal::History;
-use crate::themes::theme::WarpTheme;
+use crate::themes::theme::GalaxyTheme;
 use crate::ui_components::icons::Icon;
 use crate::workflows::{WorkflowSelectionSource, WorkflowSource, WorkflowType};
 use crate::workspace::WorkspaceAction;
@@ -625,7 +625,7 @@ impl WelcomePalette {
         })
     }
 
-    fn render_palette_list(&self, theme: &WarpTheme, app: &AppContext) -> Box<dyn Element> {
+    fn render_palette_list(&self, theme: &GalaxyTheme, app: &AppContext) -> Box<dyn Element> {
         match self.search_bar_state.as_ref(app).query_result_renderers() {
             None => {
                 self.placeholder_query_renderer
@@ -651,7 +651,7 @@ impl WelcomePalette {
         &self,
         renderers: &[QueryResultRenderer<CommandPaletteItemAction>],
         selected_item: SelectedItem,
-        theme: &WarpTheme,
+        theme: &GalaxyTheme,
         app: &AppContext,
     ) -> Box<dyn Element> {
         let selected_index = match selected_item {