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/settings_view/features_page.rs

@@ -77,7 +77,7 @@ use crate::terminal::settings::{
 };
 use crate::terminal::{BlockListSettings, SnackbarEnabled};
 use crate::undo_close::UndoCloseSettings;
-use crate::user_config::{WarpConfig, WarpConfigUpdateEvent};
+use crate::user_config::{GalaxyConfig, GalaxyConfigUpdateEvent};
 use crate::util::bindings::{
     keybinding_name_to_display_string, reset_keybinding_to_default, set_custom_keybinding,
 };
@@ -2141,8 +2141,8 @@ impl FeaturesPageView {
         let default_session_mode_dropdown = ctx.add_typed_action_view(FilterableDropdown::new);
         Self::update_default_session_mode_dropdown(default_session_mode_dropdown.clone(), ctx);
 
-        ctx.subscribe_to_model(&WarpConfig::handle(ctx), |me, _, event, ctx| {
-            if matches!(event, WarpConfigUpdateEvent::TabConfigs) {
+        ctx.subscribe_to_model(&GalaxyConfig::handle(ctx), |me, _, event, ctx| {
+            if matches!(event, GalaxyConfigUpdateEvent::TabConfigs) {
                 Self::update_default_session_mode_dropdown(
                     me.default_session_mode_dropdown.clone(),
                     ctx,
@@ -3339,7 +3339,7 @@ impl FeaturesPageView {
                     .collect();
 
                 // Append each loaded tab config
-                let tab_configs = WarpConfig::as_ref(ctx).tab_configs().to_vec();
+                let tab_configs = GalaxyConfig::as_ref(ctx).tab_configs().to_vec();
                 for config in &tab_configs {
                     if let Some(path) = &config.source_path {
                         items.push(DropdownItem::new(