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>

crates/galaxy_core/src/paths_tests.rs

@@ -37,7 +37,7 @@ fn test_config_local_dir_path() {
 }
 
 #[test]
-fn test_warp_home_config_dir_path() {
+fn test_galaxy_home_config_dir_path() {
     let home_dir = home_dir().expect("Should be able to compute home directory");
     let expected_dir_name = match ChannelState::data_profile() {
         Some(data_profile) => format!(".warp-core-oss-{data_profile}"),
@@ -45,20 +45,20 @@ fn test_warp_home_config_dir_path() {
     };
 
     assert_eq!(
-        warp_home_config_dir(),
+        galaxy_home_config_dir(),
         Some(home_dir.join(expected_dir_name))
     );
 }
 
 #[test]
 fn test_warp_home_skills_and_mcp_paths() {
-    let Some(config_dir) = warp_home_config_dir() else {
+    let Some(config_dir) = galaxy_home_config_dir() else {
         panic!("Should be able to compute Warp home config directory");
     };
 
-    assert_eq!(warp_home_skills_dir(), Some(config_dir.join("skills")));
+    assert_eq!(galaxy_home_skills_dir(), Some(config_dir.join("skills")));
     assert_eq!(
-        warp_home_mcp_config_file_path(),
+        galaxy_home_mcp_config_file_path(),
         Some(config_dir.join(".mcp.json"))
     );
 }