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/blocklist/view_util.rs

@@ -19,7 +19,7 @@ use pathfinder_color::ColorU;
 use pathfinder_geometry::vector::vec2f;
 
 use crate::{
-    themes::theme::{AnsiColorIdentifier, Fill, WarpTheme},
+    themes::theme::{AnsiColorIdentifier, Fill, GalaxyTheme},
     ui_components::icons::Icon,
 };
 
@@ -52,7 +52,7 @@ pub const CLAUDE_ORANGE: ColorU = ColorU {
 
 /// Returns the color to be used for various AI signifiers
 /// input with AI mode).
-pub fn ai_brand_color(theme: &WarpTheme) -> ColorU {
+pub fn ai_brand_color(theme: &GalaxyTheme) -> ColorU {
     AnsiColorIdentifier::Magenta
         .to_ansi_color(&theme.terminal_colors().normal)
         .into()
@@ -60,7 +60,7 @@ pub fn ai_brand_color(theme: &WarpTheme) -> ColorU {
 
 /// Returns the color to be used for error UI throughout Agent Mode (like the "request limit
 /// exceeded" chip).
-pub fn error_color(theme: &WarpTheme) -> ColorU {
+pub fn error_color(theme: &GalaxyTheme) -> ColorU {
     AnsiColorIdentifier::Red
         .to_ansi_color(&theme.terminal_colors().normal)
         .into()