Fix Warping indicator stuck after Bedrock LLM finishes responding

Bedrock was calling suggest_next_prompt tool which created a SuggestPrompt
action that waited forever on a oneshot channel for UI interaction that
never fires in the Bedrock path, keeping the conversation permanently
InProgress. Fixed by filtering the tool from the Bedrock tool list and
skipping it at the stream level when the LLM calls it from context history.

Also includes: Bedrock cache token tracking, cost estimation, LSP
improvements, conversation usage view updates, and external config support.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/src/ai/bedrock/client.rs

@@ -7,6 +7,7 @@ use aws_sdk_bedrockruntime::Client as BedrockRuntimeClient;
 
 use crate::settings::ai::BedrockAuthMethod;
 
+use super::external_config::ExternalBedrockConfig;
 use super::convert::{build_converse_request, ConversationMessage, ToolDefinition};
 use super::diagnostic::BedrockDiagnosticLogger;
 use super::models::apply_cross_region_prefix;
@@ -29,6 +30,33 @@ pub struct BedrockClientConfig {
     pub fallback_to_warp: bool,
 }
 
+impl BedrockClientConfig {
+    /// Applies external config (from Claude Code / OpenCode) as fallback values
+    /// when Galaxy's own settings are at their defaults.
+    pub fn with_external_fallbacks(mut self) -> Self {
+        let external = ExternalBedrockConfig::load();
+        if external.is_empty() {
+            return self;
+        }
+
+        if self.profile == "default" {
+            if let Some(profile) = external.profile {
+                log::info!("[bedrock] Using profile from external config: {profile}");
+                self.profile = profile;
+            }
+        }
+
+        if self.region.is_empty() {
+            if let Some(region) = external.region {
+                log::info!("[bedrock] Using region from external config: {region}");
+                self.region = region;
+            }
+        }
+
+        self
+    }
+}
+
 #[derive(Debug, thiserror::Error)]
 pub enum BedrockError {
     #[error("Bedrock credentials not configured")]