fix(tui): classify stream decode failures as network errors

Classify stream/body decode failures such as the #2847 report as recoverable network interruptions and add focused taxonomy coverage.\n\nVerification:\n- cargo test -p codewhale-tui error_taxonomy::tests --locked\n- git diff --check\n- cmp -s CHANGELOG.md crates/tui/CHANGELOG.md\n- ./scripts/release/check-versions.sh\n- ./scripts/release/check-ohos-deps.sh

CHANGELOG.md

@@ -310,6 +310,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Fixed
 
+- Stream/body decode failures such as `Stream read error: error decoding
+  response body` are now classified as recoverable network interruptions
+  instead of generic internal errors, keeping the transcript and triage metadata
+  aligned with the existing stream retry path (#2847). Thanks
+  @qamranmushtaq-collab for the Windows/npx DeepSeek report.
 - The TUI footer, `/status`, `/mcp` manager, and command-palette MCP entries
   now count trusted workspace-local `.codewhale/mcp.json` servers together with
   the global MCP config, matching `codewhale mcp list` for merged global +

crates/tui/CHANGELOG.md

@@ -310,6 +310,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Fixed
 
+- Stream/body decode failures such as `Stream read error: error decoding
+  response body` are now classified as recoverable network interruptions
+  instead of generic internal errors, keeping the transcript and triage metadata
+  aligned with the existing stream retry path (#2847). Thanks
+  @qamranmushtaq-collab for the Windows/npx DeepSeek report.
 - The TUI footer, `/status`, `/mcp` manager, and command-palette MCP entries
   now count trusted workspace-local `.codewhale/mcp.json` servers together with
   the global MCP config, matching `codewhale mcp list` for merged global +

crates/tui/src/error_taxonomy.rs

@@ -342,6 +342,10 @@ pub fn classify_error_message(message: &str) -> ErrorCategory {
     if lower.contains("network")
         || lower.contains("connection")
         || lower.contains("dns")
+        || lower.contains("stream read error")
+        || lower.contains("error decoding response body")
+        || lower.contains("chunk decode error")
+        || lower.contains("body decode")
         || lower.contains("temporarily unavailable")
         || lower.contains(" 502 ")
         || lower.contains(" 503 ")
@@ -548,6 +552,22 @@ mod tests {
         );
     }
 
+    #[test]
+    fn network_catches_stream_body_decode_failures() {
+        for msg in [
+            "Warn Stream read error: error decoding response body",
+            "Stream read error: error decoding response body",
+            "chunk decode error",
+            "provider body decode failed mid-stream",
+        ] {
+            assert_eq!(
+                classify(msg),
+                ErrorCategory::Network,
+                "expected Network for `{msg}`",
+            );
+        }
+    }
+
     #[test]
     fn authentication_beats_authorization_when_api_key_phrasing_is_used() {
         // "api key" landing on Authentication (not Authorization) keeps