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/resource_center/mod.rs

@@ -92,7 +92,7 @@ pub enum TipAction {
     WarpAI,
     // This toggles Warp Drive rather than opening it. This enum can't directly be
     // renamed because we serialize it into the welcome tips.
-    OpenWarpDrive,
+    OpenGalaxyDrive,
     Changelog,
     // Note that this item has been deprecated from the UI and is not in any section.
     // We are leaving it in this enum to ensure that we don't re-use `Workflows` as a
@@ -112,7 +112,7 @@ impl TipAction {
             TipAction::ThemePicker => "workspace:show_theme_chooser",
             TipAction::SaveNewLaunchConfig => "workspace:open_launch_config_save_modal",
             TipAction::WarpAI => "workspace:toggle_ai_assistant",
-            TipAction::OpenWarpDrive => "workspace:toggle_left_panel",
+            TipAction::OpenGalaxyDrive => "workspace:toggle_left_panel",
             // Slash commands are also registered as editable bindings, so callers can look them up here
             // the same way they do regular app actions.
             TipAction::Changelog => "/changelog",