fix: Chroma connection errors and remove dead last_user_message code (#525)

* fix: distinguish connection errors from collection-not-found in ChromaSync

Previously, ensureCollection() caught ALL errors from chroma_get_collection_info
and assumed they meant "collection doesn't exist". This caused connection errors
like "Not connected" to trigger unnecessary collection creation attempts.

Now connection-related errors are re-thrown immediately instead of being
misinterpreted as missing collections.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

* fix: improve error handling for Chroma connection and collection creation

* fix: remove dead last_user_message from summarize flow

The last_user_message field was extracted from transcripts but never used.
In Claude Code transcripts, "user" type messages are mostly tool_results,
not actual user input. The user's original request is already stored in
user_prompts table.

This removes the false warning "Missing last_user_message when queueing
summary" which was complaining about missing data that didn't exist and
wasn't needed.

Changes:
- summary-hook: Only extract last_assistant_message
- SessionRoutes: Remove last_user_message from request body handling
- SessionManager.queueSummarize: Remove lastUserMessage parameter
- PendingMessage interface: Remove last_user_message field
- SDKSession interface: Remove last_user_message field
- All agents: Remove last_user_message from buildSummaryPrompt calls

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

* build artifacts for plugin

* Enhance error handling across multiple services

- Improved logging in `BranchManager.ts` to capture recovery checkout failures.
- Updated `PaginationHelper.ts` to log when file paths are plain strings instead of valid JSON.
- Enhanced error logging in `SDKAgent.ts` for Claude executable detection failures.
- Added logging for plain string handling in `SearchManager.ts` for files read and edited.
- Improved logging in `paths.ts` for git root detection failures.
- Enhanced JSON parsing error handling in `timeline-formatting.ts` with previews of failed inputs.
- Updated `transcript-parser.ts` to log summary of parse errors after processing transcript lines.
- Established a baseline for error handling practices in `error-handling-baseline.txt`.
- Documented error handling anti-pattern rules in `CLAUDE.md` to prevent silent failures and improve code quality.

* Add error handling anti-pattern detection script and guidelines

- Introduced `detect-error-handling-antipatterns.ts` to identify common error handling issues in TypeScript code.
- Created comprehensive documentation in `CLAUDE.md` outlining forbidden patterns, allowed patterns, and critical path protection rules.
- Implemented checks for empty catch blocks, logging practices, and try-catch block sizes to prevent silent failures and improve debugging.
- Established a reporting mechanism to summarize detected anti-patterns with severity levels.

* feat: add console filter bar and log line parsing with filtering capabilities

- Introduced a console filter bar with options to filter logs by level and component.
- Implemented parsing of log lines to extract structured data including timestamp, level, component, and correlation ID.
- Added functionality to toggle individual and all levels/components for filtering.
- Enhanced log line rendering with color coding based on log level and special message types.
- Improved responsiveness of the filter bar for smaller screens.

---------

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

src/sdk/prompts.ts

@@ -20,7 +20,6 @@ export interface SDKSession {
   memory_session_id: string | null;
   project: string;
   user_prompt: string;
-  last_user_message?: string;
   last_assistant_message?: string;
 }
 
@@ -97,17 +96,19 @@ export function buildObservationPrompt(obs: Observation): string {
   try {
     toolInput = typeof obs.tool_input === 'string' ? JSON.parse(obs.tool_input) : obs.tool_input;
   } catch (error) {
-    // Expected: tool_input may not be valid JSON (e.g., plain strings)
-    // Not logging - this is a normal fallback for non-JSON tool inputs
-    toolInput = obs.tool_input;  // If parse fails, use raw value
+    logger.debug('SDK', 'Tool input is plain string, using as-is', {
+      toolName: obs.tool_name
+    }, error as Error);
+    toolInput = obs.tool_input;
   }
 
   try {
     toolOutput = typeof obs.tool_output === 'string' ? JSON.parse(obs.tool_output) : obs.tool_output;
   } catch (error) {
-    // Expected: tool_output may not be valid JSON (e.g., plain strings)
-    // Not logging - this is a normal fallback for non-JSON tool outputs
-    toolOutput = obs.tool_output;  // If parse fails, use raw value
+    logger.debug('SDK', 'Tool output is plain string, using as-is', {
+      toolName: obs.tool_name
+    }, error as Error);
+    toolOutput = obs.tool_output;
   }
 
   return `<observed_from_primary_session>