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/autoupdate/mod.rs

@@ -26,7 +26,7 @@ use galaxyui::r#async::Timer;
 use galaxyui::windowing::state::ApplicationStage;
 use galaxyui::windowing::{self, WindowManager};
 use galaxyui::{
-    accessibility::{AccessibilityContent, WarpA11yRole},
+    accessibility::{AccessibilityContent, GalaxyA11yRole},
     AppContext,
 };
 use galaxyui::{Entity, ModelContext, SingletonEntity, ViewContext};
@@ -679,12 +679,12 @@ pub fn accessibility_content(
         (RequestType::ManualCheck, Ok(UpdateReady::Yes { .. })) => Some(AccessibilityContent::new(
             "Update available.",
             "Use the command palette to install and relaunch Galaxy",
-            WarpA11yRole::HelpRole,
+            GalaxyA11yRole::HelpRole,
         )),
         // Any non-successful autoupdate check
         (RequestType::ManualCheck, _) => Some(AccessibilityContent::new_without_help(
             "No updates available",
-            WarpA11yRole::HelpRole,
+            GalaxyA11yRole::HelpRole,
         )),
         _ => None,
     }