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/util/bindings.rs

@@ -32,7 +32,7 @@ pub const MAC_MENUS_CONTEXT: DescriptionContext = DescriptionContext::Custom("ma
 pub enum CustomAction {
     NewTab,
     NewFile,
-    ShowAboutWarp,
+    ShowAboutGalaxy,
     ShowSettings,
     ConfigureKeybindings,
     ShowAccount,
@@ -104,7 +104,7 @@ pub enum CustomAction {
     ToggleSyncTerminalInputsInCurrentTab,
     DisableSyncTerminalInputs,
     ReopenClosedSession,
-    ToggleWarpDrive,
+    ToggleGalaxyDrive,
     AddWindow,
     CloseCurrentSession,
     CloseWindow,
@@ -390,7 +390,7 @@ pub fn custom_tag_to_keystroke(custom: CustomTag) -> Option<Keystroke> {
 
         // This is one of the app's hardcoded keybindings.
         CustomAction::AddWindow => Keystroke::parse(cmd_or_ctrl_shift("n")).ok(),
-        CustomAction::ToggleWarpDrive => {
+        CustomAction::ToggleGalaxyDrive => {
             if OperatingSystem::get().is_mac() {
                 Keystroke::parse("cmd-\\").ok()
             } else {
@@ -435,7 +435,7 @@ pub fn custom_tag_to_keystroke(custom: CustomTag) -> Option<Keystroke> {
         }
         CustomAction::NewTerminalTab
         | CustomAction::NewFile
-        | CustomAction::ShowAboutWarp
+        | CustomAction::ShowAboutGalaxy
         | CustomAction::SplitPaneLeft
         | CustomAction::SelectAllBlocks
         | CustomAction::SplitPaneUp