fix(sessions): /save lands under $HERMES_HOME, widen browse+TUI picker, force-refresh ollama-cloud on setup (#16296)

Four independent session-UX bugs reported by an external user (#16294).

/save wrote hermes_conversation_<ts>.json to CWD — invisible to
'hermes sessions browse' and easy to lose. Snapshots now write under
~/.hermes/sessions/saved/ and the command prints the absolute path plus
a 'hermes --resume <id>' hint for the live DB-indexed session.

'hermes sessions browse' default --limit raised from 50 to 500. With the
old ceiling, users with moderately long histories saw only the most
recent 50 rows and assumed older sessions had been lost.

TUI session.list (`/resume` picker) switched from a hardcoded allow-list
of 13 gateway source names to a deny-list of just { 'tool' }. Sessions
tagged acp / webhook / user-defined HERMES_SESSION_SOURCE values and
any newly-added platform now surface. Default limit 20 → 200.

ollama-cloud provider setup passes force_refresh=True to
fetch_ollama_cloud_models() so a user entering their API key sees the
fresh catalog (e.g. deepseek v4 flash, kimi k2.6) immediately instead
of waiting up to an hour for the disk cache TTL to expire.

Closes #16294.

cli.py

@@ -4951,22 +4951,37 @@ class HermesCLI:
         _cprint(f"  Branch session:   {new_session_id}")
 
     def save_conversation(self):
-        """Save the current conversation to a file."""
+        """Save the current conversation to a JSON snapshot under ~/.hermes/sessions/saved/.
+
+        The snapshot is a convenience export for sharing or off-line inspection;
+        every message is already persisted incrementally to the SQLite session
+        DB, so the live session remains resumable via ``hermes --resume <id>``
+        regardless of whether the user ever runs ``/save``.
+        """
         if not self.conversation_history:
             print("(;_;) No conversation to save.")
             return
-        
+
         timestamp = datetime.now().strftime("%Y%m%d_%H%M%S")
-        filename = f"hermes_conversation_{timestamp}.json"
-        
+        saved_dir = get_hermes_home() / "sessions" / "saved"
         try:
-            with open(filename, "w", encoding="utf-8") as f:
+            saved_dir.mkdir(parents=True, exist_ok=True)
+        except Exception as e:
+            print(f"(x_x) Failed to create save directory {saved_dir}: {e}")
+            return
+        path = saved_dir / f"hermes_conversation_{timestamp}.json"
+
+        try:
+            with open(path, "w", encoding="utf-8") as f:
                 json.dump({
                     "model": self.model,
+                    "session_id": self.session_id,
                     "session_start": self.session_start.isoformat(),
                     "messages": self.conversation_history,
                 }, f, indent=2, ensure_ascii=False)
-            print(f"(^_^)v Conversation saved to: {filename}")
+            print(f"(^_^)v Conversation snapshot saved to: {path}")
+            if self.session_id:
+                print(f"       Resume the live session with: hermes --resume {self.session_id}")
         except Exception as e:
             print(f"(x_x) Failed to save: {e}")