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/models.rs

@@ -1,5 +1,7 @@
 use crate::settings::ai::BedrockModelConfig;
 
+use super::external_config::ExternalBedrockConfig;
+
 pub struct DefaultModel {
     pub model_id: &'static str,
     pub display_name: &'static str,
@@ -55,18 +57,43 @@ pub const DEFAULT_BEDROCK_MODELS: &[DefaultModel] = &[
 ];
 
 pub fn get_effective_models(user_models: &[BedrockModelConfig]) -> Vec<BedrockModelConfig> {
-    if user_models.is_empty() {
-        DEFAULT_BEDROCK_MODELS
+    if !user_models.is_empty() {
+        return user_models.to_vec();
+    }
+
+    // Fall back to models from external configs (Claude Code / OpenCode)
+    let external = ExternalBedrockConfig::load();
+    if !external.models.is_empty() {
+        log::info!(
+            "[bedrock] Using {} model(s) from external config",
+            external.models.len()
+        );
+        // Merge external models with defaults so the user still sees all defaults
+        let mut models = external.models;
+        let defaults: Vec<BedrockModelConfig> = DEFAULT_BEDROCK_MODELS
             .iter()
             .map(|m| BedrockModelConfig {
                 model_id: m.model_id.to_string(),
                 display_name: m.display_name.to_string(),
                 vision_supported: m.vision_supported,
             })
-            .collect()
-    } else {
-        user_models.to_vec()
+            .collect();
+        for default in defaults {
+            if !models.iter().any(|m| m.model_id == default.model_id) {
+                models.push(default);
+            }
+        }
+        return models;
     }
+
+    DEFAULT_BEDROCK_MODELS
+        .iter()
+        .map(|m| BedrockModelConfig {
+            model_id: m.model_id.to_string(),
+            display_name: m.display_name.to_string(),
+            vision_supported: m.vision_supported,
+        })
+        .collect()
 }
 
 pub fn apply_cross_region_prefix(model_id: &str, region: &str) -> String {