refactor: remove web tools from agent (dispatch handles all web work)

Reduces tool count from 10 to 8 for the LLM, removing the conflict
between 'use dispatch for everything' and having web_search available.
The task_worker has its own web tools for background tasks.

agent/agent.py

@@ -89,8 +89,7 @@ SYSTEM_PROMPT = textwrap.dedent("""\
     This includes: looking up news, researching topics, checking current
     events, prices, sports scores, writing something, summarizing, comparing
     options, planning, or anything that takes more than a couple seconds to
-    think through. Do NOT use web_search or web_scrape directly; always
-    dispatch instead. Memory recall/remember is NEVER a dispatch task —
+    think through. Memory recall/remember is NEVER a dispatch task —
     call those tools directly.
     Examples:
     - User says "what's the latest news?" → CALL dispatch_task with
@@ -350,22 +349,6 @@ def build_mcp_toolsets() -> list[mcp.MCPToolset]:
     """
     toolsets: list[mcp.MCPToolset] = []
 
-    if WEB_MCP_ENABLED:
-        python_bin = os.path.join(os.path.dirname(os.path.abspath(__file__)), ".venv", "bin", "python")
-        web_mcp_script = os.path.join(os.path.dirname(os.path.abspath(__file__)), "web_mcp.py")
-        toolsets.append(
-            mcp.MCPToolset(
-                id="web-access",
-                mcp_server=mcp.MCPServerStdio(
-                    command=python_bin,
-                    args=[web_mcp_script],
-                    env={**os.environ, "FIRECRAWL_BASE": FIRECRAWL_BASE},
-                    client_session_timeout_seconds=120,
-                ),
-            )
-        )
-        logger.info("Web-access MCP toolset enabled (Firecrawl at %s)", FIRECRAWL_BASE)
-
     python_bin = os.path.join(os.path.dirname(os.path.abspath(__file__)), ".venv", "bin", "python")
     weather_mcp_script = os.path.join(os.path.dirname(os.path.abspath(__file__)), "weather_mcp.py")
     toolsets.append(