fix(agent): expand regex auto-escalation to cover files and sessions

Add regex patterns for chat-to-agent auto-escalation of:
- files: read/show/open/what's-in-file requests in IT/EN
- sessions: search/find in chat history in IT/EN

File patterns require the target to mention 'file' or look like a
filename (extension, path prefix, or leading capital) to avoid
collisions with UI panel names ('open settings' stays UI).

Combined with the earlier contacts patterns this covers the main
remaining tool domains reachable from a plain chat message.

src/action_intents.py

@@ -83,6 +83,30 @@ _ROUTING_PATTERNS: tuple[tuple[str, str, Pattern[str]], ...] = tuple(
         ("contacts", "contact lookup request", r"\b(?:look\s+up|find|search|get|pull\s+up|cerca|trova|busca)\b.{1,60}?\b(?:in|on|nel|nella|nell|nei|negli|en|su)\s+(?:my\s+)?(?:contacto?s?|contatt[io]s?|rubrica|address\s+book)\b"),
         ("contacts", "contact search request", r"\b(?:search|find|look\s+up|cerca|trova|busca)\b.{0,40}\b(?:my\s+)?(?:contacto?s?|contatt[io]s?|rubrica|address\s+book)\b"),
 
+        # Files / directory lookup. A question like "read the README" or
+        # "cosa c'è in config.yaml" needs the read_file / grep tools.
+        # The target must mention "file" or be a plausible filename: has an
+        # extension, starts with ./~/, or begins with a capital letter.
+        ("files", "read or show a file", r"\b(?:read|display|open|view)\s+(?:the\s+)?(?:file\s+|contents?\s+of\s+|(?:[.~/]\S+|\S+\.\w{1,6}|(?-i:[A-Z][A-Za-z0-9_]{1,})))\b"),
+        ("files", "show me file contents", r"\bshow(?:\s+me)?\s+(?:the\s+)?(?:file\s+|contents?\s+of\s+|(?:[.~/]\S+|\S+\.\w{1,6}|(?-i:[A-Z][A-Za-z0-9_]{1,})))\b"),
+        ("files", "look at a file", r"\blook\s+at\s+(?:the\s+)?(?:file\s+|(?:[.~/]\S+|\S+\.\w{1,6}|(?-i:[A-Z][A-Za-z0-9_]{1,})))\b"),
+        ("files", "what's in a file", r"\bwhat(?:'s|\s+is)\s+(?:in|inside)\s+(?:the\s+)?(?:file\s+|(?:[.~/]\S+|\S+\.\w{1,6}|(?-i:[A-Z][A-Za-z0-9_]{1,})))\b"),
+        ("files", "what does file contain", r"\bwhat\s+does\s+(?:the\s+)?(?:file\s+)?(?:[.~/]\S+|\S+\.\w{1,6}|(?-i:[A-Z][A-Za-z0-9_]{1,}))\s+contain\b"),
+        # Italian: "leggi X", "mostrami X", "apri X", "visualizza X", "guarda X", "cosa c'è in X"
+        ("files", "leggi/apri/visualizza/guarda file", r"\b(?:leggi|apri|visualizza|guarda|vedi)\s+(?:il\s+)?(?:file\s+|contenuto\s+(?:di|del)\s+|(?:[.~/]\S+|\S+\.\w{1,6}|(?-i:[A-Z][A-Za-z0-9_]{1,})))\b"),
+        ("files", "mostrami file", r"\bmostra(?:mi)?\s+(?:il\s+)?(?:file\s+|contenuto\s+(?:di|del)\s+|(?:[.~/]\S+|\S+\.\w{1,6}|(?-i:[A-Z][A-Za-z0-9_]{1,})))\b"),
+        ("files", "cosa c'è nel file", r"\b(?:cosa|che(?:\s+cosa)?)\s+(?:c['’`]?è|c['’`]?e)\s+(?:in|dentro|nel)\s+(?:il\s+)?(?:file\s+|(?:[.~/]\S+|\S+\.\w{1,6}|(?-i:[A-Z][A-Za-z0-9_]{1,})))\b"),
+
+        # Sessions / chat-history search.
+        ("sessions", "search chats", r"\bsearch\s+(?:my\s+)?(?:chat|conversation|message)s?\b"),
+        ("sessions", "find in chats", r"\bfind\s+(?:(?:in|through)\s+)?(?:my\s+|the\s+)?(?:chats?|conversations?|messages?|history)\b"),
+        ("sessions", "look through chats", r"\b(?:look|go)\s+through\s+(?:my\s+)?(?:chats?|conversations?|history)\b"),
+        ("sessions", "what did we say", r"\bwhat\s+did\s+(?:we|i)\s+(?:say|discuss|talk)\s+about\b"),
+        # Italian: "cerca nelle chat", "trova la conversazione", "cosa abbiamo detto su X"
+        ("sessions", "cerca nelle chat", r"\bcerca\s+(?:nel(?:la|le|l['’`]?)?|nei|negli|tra\s+(?:le|i)|in)\s+(?:chat|conversazion[ei]|messaggi[o]?)\b"),
+        ("sessions", "trova conversazione", r"\btrova\s+(?:la\s+)?(?:conversazione|chat|discussione)\b"),
+        ("sessions", "cosa abbiamo detto", r"\bcosa\s+(?:abbiamo|ho)\s+(?:detto|parlato|discusso)\s+(?:di|su(?:l(?:la|le|gli)?)?|a\s+riguardo\s+(?:di|del))\b"),
+
         # Email actions.
         ("email", "assistant email action request", rf"{_ACTION_QUESTION}(?:send|write|reply|email|message|archive|delete|mark)\b.{{0,120}}\b(?:emails?|mail|messages?|inbox|unread|read)\b"),
         ("email", "send/write/reply email request", rf"{_PLEASE}(?:send|write|reply)\b.{{0,120}}\b(?:emails?|mail|messages?)\b"),