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/ai/agent_tips.rs

@@ -118,7 +118,7 @@ static DEFAULT_TIPS: LazyLock<Vec<AgentTip>> = LazyLock::new(|| {
             description: "Store reusable workflows, notebooks, and prompts in your".to_string(),
             link: Some("https://docs.warp.dev/knowledge-and-collaboration/warp-drive".to_string()),
             binding_name: None,
-            action: Some(WorkspaceAction::OpenWarpDrive),
+            action: Some(WorkspaceAction::OpenGalaxyDrive),
             kind: AgentTipKind::WarpDrive,
         },
         AgentTip {
@@ -129,7 +129,7 @@ static DEFAULT_TIPS: LazyLock<Vec<AgentTip>> = LazyLock::new(|| {
             kind: AgentTipKind::General,
         },
         AgentTip {
-            description: "`@` to add context from files, blocks, or Warp Drive objects to your prompt.".to_string(),
+            description: "`@` to add context from files, blocks, or Galaxy Drive objects to your prompt.".to_string(),
             link: Some("https://docs.warp.dev/agent-platform/local-agents/agent-context/using-to-add-context".to_string()),
             binding_name: None,
             action: None,
@@ -297,7 +297,7 @@ static DEFAULT_TIPS: LazyLock<Vec<AgentTip>> = LazyLock::new(|| {
             kind: AgentTipKind::General,
         },
         AgentTip {
-            description: "`/init` to generate a `WARP.md` file and define project rules for the agent.".to_string(),
+            description: "`/init` to generate a `GALAXY.md` file and define project rules for the agent.".to_string(),
             link: Some("https://docs.warp.dev/agent-platform/capabilities/rules".to_string()),
             binding_name: None,
             action: None,
@@ -411,7 +411,7 @@ impl WorkspaceAction {
     pub fn display_text(&self) -> Option<String> {
         match self {
             WorkspaceAction::OpenPalette { .. } => Some("Open palette".to_string()),
-            WorkspaceAction::OpenWarpDrive => Some("Warp Drive.".to_string()),
+            WorkspaceAction::OpenGalaxyDrive => Some("Galaxy Drive.".to_string()),
             WorkspaceAction::ToggleRightPanel => Some("Show diff view".to_string()),
             _ => None,
         }