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/block/view_impl.rs

@@ -86,7 +86,7 @@ use galaxy_core::ui::color::contrast::{
     foreground_color_with_minimum_contrast, MinimumAllowedContrast,
 };
 use galaxy_core::ui::color::Rgb;
-use galaxy_core::ui::theme::{Fill, WarpTheme};
+use galaxy_core::ui::theme::{Fill, GalaxyTheme};
 use galaxyui::elements::{Highlight, HighlightedRange, Text};
 use galaxyui::fonts::Properties;
 use galaxyui::platform::Cursor;
@@ -433,7 +433,7 @@ pub(crate) fn add_highlights_to_rich_text(
     find_context: Option<FindContext<'_>>,
     location_index: usize,
     line_count: usize,
-    theme: &WarpTheme,
+    theme: &GalaxyTheme,
     is_selecting: bool,
     is_action: bool,
     app: &AppContext,
@@ -1080,6 +1080,7 @@ impl View for AIBlock {
                 search_codebase_view: &self.search_codebase_view,
                 web_search_views: &self.web_search_views,
                 web_fetch_views: &self.web_fetch_views,
+                summarization_views: &self.summarization_views,
                 review_changes_button: &self.review_changes_button,
                 open_all_comments_button: &self.open_all_comments_button,
                 dismiss_suggestion_button: &self.dismiss_suggestion_button,