Move FreeScout docs from TOOLS.md into invoice-generator skill

TOOLS.md

@@ -176,28 +176,6 @@ ainews reset                # Clear seen history
 
 ---
 
-## FreeScout Time Tracking
-
-Helper script: `~/bin/freescout`
-
-```bash
-freescout mailboxes                          # List mailboxes
-freescout users                              # List users
-freescout report --from DATE --to DATE       # Show time report (tab-separated)
-  [--mailbox ID] [--user ID] [--customer NAME]
-freescout excel --from DATE --to DATE        # Generate invoice Excel
-  [--mailbox ID] [--user ID] [--customer NAME] [--output file.xlsx]
-```
-
-- Credentials: `.credentials/services.env` (CLOONAR_DB_* + FREESCOUT_DB_NAME)
-- Queries timelogs table directly (API doesn't expose time tracking)
-- Excel groups by conversation, shows subject, customer, website, hours
-- Customer and Website are custom field dropdowns (resolved to labels)
-- `time_spent` is stored in seconds, displayed as decimal hours
-- Only timelogs within the date range are counted (not conversation dates)
-
----
-
 ## Brain Dump CLI
 
 Helper script: `~/clawd/bin/tasks`