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/view_components/find.rs

@@ -14,7 +14,7 @@ use galaxyui::elements::{ChildAnchor, OffsetPositioning, Radius, SavePosition, S
 use galaxyui::keymap::EditableBinding;
 use galaxyui::ui_components::components::UiComponent;
 pub use galaxyui::{
-    accessibility::{AccessibilityContent, WarpA11yRole},
+    accessibility::{AccessibilityContent, GalaxyA11yRole},
     elements::{ParentElement as _, Stack},
     geometry::vector::vec2f,
     AppContext,
@@ -258,10 +258,10 @@ impl<T: FindModel + Entity<Event = FindEvent> + 'static> Find<T> {
                     self.model.as_ref(ctx).match_count()
                 ),
                 "Use enter and shift-enter to navigate between matches. Escape to quit.",
-                WarpA11yRole::UserAction,
+                GalaxyA11yRole::UserAction,
             )
         } else {
-            AccessibilityContent::new_without_help("No results.", WarpA11yRole::UserAction)
+            AccessibilityContent::new_without_help("No results.", GalaxyA11yRole::UserAction)
         };
         ctx.emit_a11y_content(content);
     }
@@ -500,7 +500,7 @@ impl<T: FindModel + Entity<Event = FindEvent> + 'static> View for Find<T> {
         Some(AccessibilityContent::new(
             "Type searched phrase.",
             "Press escape to quit, use enter and shift-enter to navigate between matches",
-            WarpA11yRole::TextareaRole,
+            GalaxyA11yRole::TextareaRole,
         ))
     }