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/ai/src/skills/skill_provider.rs

@@ -159,7 +159,7 @@ pub fn provider_rank(provider: SkillProvider) -> usize {
 
 pub fn home_skills_path(provider: SkillProvider) -> Option<PathBuf> {
     if provider == SkillProvider::Warp {
-        return galaxy_core::paths::warp_home_skills_dir();
+        return galaxy_core::paths::galaxy_home_skills_dir();
     }
     let definition = SKILL_PROVIDER_DEFINITIONS
         .iter()
@@ -220,17 +220,17 @@ mod tests {
     fn warp_home_skills_path_uses_warp_home_path() {
         assert_eq!(
             home_skills_path(SkillProvider::Warp),
-            galaxy_core::paths::warp_home_skills_dir()
+            galaxy_core::paths::galaxy_home_skills_dir()
         );
     }
 
     #[test]
     fn warp_home_skill_path_is_home_warp_skill() {
-        let Some(warp_home_skills_dir) = galaxy_core::paths::warp_home_skills_dir() else {
+        let Some(galaxy_home_skills_dir) = galaxy_core::paths::galaxy_home_skills_dir() else {
             eprintln!("Skipping test: home directory not available");
             return;
         };
-        let path = warp_home_skills_dir.join("my-skill").join("SKILL.md");
+        let path = galaxy_home_skills_dir.join("my-skill").join("SKILL.md");
 
         assert_eq!(get_provider_for_path(&path), Some(SkillProvider::Warp));
         assert_eq!(get_scope_for_path(&path), SkillScope::Home);