refactor: optimize token usage, deduplicate code, fix bugs across agents

Token reduction (~40% per session, ~2.3M fewer tokens per 200-feature project):
- Agent-type-specific tool lists: coding 9, testing 5, init 5 (was 19 for all)
- Right-sized max_turns: coding 300, testing 100 (was 1000 for all)
- Trimmed coding prompt template (~150 lines removed)
- Streamlined testing prompt with batch support
- YOLO mode now strips browser testing instructions from prompt
- Added Grep, WebFetch, WebSearch to expand project session

Performance improvements:
- Rate limit retries start at ~15s with jitter (was fixed 60s)
- Post-spawn delay reduced to 0.5s (was 2s)
- Orchestrator consolidated to 1 DB query per loop (was 5-7)
- Testing agents batch 3 features per session (was 1)
- Smart context compaction preserves critical state, discards noise

Bug fixes:
- Removed ghost feature_release_testing MCP tool (wasted tokens every test session)
- Forward all 9 Vertex AI env vars to chat sessions (was missing 3)
- Fix DetachedInstanceError risk in test batch ORM access
- Prevent duplicate testing of same features in parallel mode

Code deduplication:
- _get_project_path(): 9 copies -> 1 shared utility (project_helpers.py)
- validate_project_name(): 9 copies -> 2 variants in 1 file (validation.py)
- ROOT_DIR: 10 copies -> 1 definition (chat_constants.py)
- API_ENV_VARS: 4 copies -> 1 source of truth (env_constants.py)

Security hardening:
- Unified sensitive directory blocklist (14 dirs, was two divergent lists)
- Cached get_blocked_paths() for O(1) directory listing checks
- Terminal security warning when ALLOW_REMOTE=1 exposes WebSocket
- 20 new security tests for EXTRA_READ_PATHS blocking
- Extracted _validate_command_list() and _validate_pkill_processes() helpers

Type safety:
- 87 mypy errors -> 0 across 58 source files
- Installed types-PyYAML for proper yaml stub types
- Fixed SQLAlchemy Column[T] coercions across all routers

Dead code removed:
- 13 files deleted (~2,679 lines): unused UI components, debug logs, outdated docs
- 7 unused npm packages removed (Radix UI components with 0 imports)
- AgentAvatar.tsx reduced from 615 -> 119 lines (SVGs extracted to mascotData.tsx)

New CLI options:
- --testing-batch-size (1-5) for parallel mode test batching
- --testing-feature-ids for direct multi-feature testing

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

server/main.py

@@ -7,6 +7,7 @@ Provides REST API, WebSocket, and static file serving.
 """
 
 import asyncio
+import logging
 import os
 import shutil
 import sys
@@ -42,6 +43,7 @@ from .routers import (
 )
 from .schemas import SetupStatus
 from .services.assistant_chat_session import cleanup_all_sessions as cleanup_assistant_sessions
+from .services.chat_constants import ROOT_DIR
 from .services.dev_server_manager import (
     cleanup_all_devservers,
     cleanup_orphaned_devserver_locks,
@@ -53,7 +55,6 @@ from .services.terminal_manager import cleanup_all_terminals
 from .websocket import project_websocket
 
 # Paths
-ROOT_DIR = Path(__file__).parent.parent
 UI_DIST_DIR = ROOT_DIR / "ui" / "dist"
 
 
@@ -88,10 +89,19 @@ app = FastAPI(
     lifespan=lifespan,
 )
 
+# Module logger
+logger = logging.getLogger(__name__)
+
 # Check if remote access is enabled via environment variable
 # Set by start_ui.py when --host is not 127.0.0.1
 ALLOW_REMOTE = os.environ.get("AUTOCODER_ALLOW_REMOTE", "").lower() in ("1", "true", "yes")
 
+if ALLOW_REMOTE:
+    logger.warning(
+        "ALLOW_REMOTE is enabled. Terminal WebSocket is exposed without sandboxing. "
+        "Only use this in trusted network environments."
+    )
+
 # CORS - allow all origins when remote access is enabled, otherwise localhost only
 if ALLOW_REMOTE:
     app.add_middleware(