feat: Phase 0+1 — repo sync, pino, lint fixes, core components

Phase 0:
- Synced latest live-status.js from workspace (9928 bytes)
- Fixed 43 lint issues: empty catch blocks, console statements
- Added pino dependency
- Created src/tool-labels.json with all known tool mappings
- make check passes

Phase 1 (Core Components):
- src/config.js: env-var config with validation, throws on missing required vars
- src/logger.js: pino singleton with child loggers, level validation
- src/circuit-breaker.js: CLOSED/OPEN/HALF_OPEN state machine with callbacks
- src/tool-labels.js: exact/prefix/regex tool->label resolver with external override
- src/status-box.js: Mattermost post manager (keepAlive, throttle, retry, circuit breaker)
- src/status-formatter.js: pure SessionState->text formatter (nested, compact)
- src/health.js: HTTP health endpoint + metrics
- src/status-watcher.js: JSONL file watcher (inotify, compaction detection, idle detection)

Tests:
- test/unit/config.test.js: 7 tests
- test/unit/circuit-breaker.test.js: 12 tests
- test/unit/logger.test.js: 5 tests
- test/unit/status-formatter.test.js: 20 tests
- test/unit/tool-labels.test.js: 15 tests

All 59 unit tests pass. make check clean.

src/tool-labels.json

@@ -0,0 +1,41 @@
+{
+  "_comment": "Tool name to human-readable label mapping. Supports exact match, prefix match (end with *), and regex (start with /).",
+  "exact": {
+    "Read": "Reading file...",
+    "Write": "Writing file...",
+    "Edit": "Editing file...",
+    "exec": "Running command...",
+    "process": "Managing process...",
+    "web_search": "Searching the web...",
+    "web_fetch": "Fetching URL...",
+    "browser": "Controlling browser...",
+    "canvas": "Drawing canvas...",
+    "nodes": "Querying nodes...",
+    "message": "Sending message...",
+    "tts": "Generating speech...",
+    "subagents": "Managing sub-agents...",
+    "image": "Analyzing image...",
+    "camofox_create_tab": "Opening browser tab...",
+    "camofox_close_tab": "Closing browser tab...",
+    "camofox_navigate": "Navigating browser...",
+    "camofox_click": "Clicking element...",
+    "camofox_type": "Typing in browser...",
+    "camofox_scroll": "Scrolling page...",
+    "camofox_screenshot": "Taking screenshot...",
+    "camofox_snapshot": "Capturing page snapshot...",
+    "camofox_list_tabs": "Listing browser tabs...",
+    "camofox_import_cookies": "Importing cookies...",
+    "claude_code_start": "Starting Claude Code task...",
+    "claude_code_status": "Checking Claude Code status...",
+    "claude_code_output": "Reading Claude Code output...",
+    "claude_code_cancel": "Cancelling Claude Code task...",
+    "claude_code_cleanup": "Cleaning up Claude Code sessions...",
+    "claude_code_sessions": "Listing Claude Code sessions..."
+  },
+  "prefix": {
+    "camofox_": "Using browser...",
+    "claude_code_": "Running Claude Code...",
+    "nodes_": "Querying nodes..."
+  },
+  "default": "Working..."
+}