strategies: fix table renderer crushing columns to zero width

[garethreakes]

The default print_df gives every DataFrame column equal weight, so
ai_momentum's 30-element conids list (~150 chars of integers) starves
the name/state/bar_size columns to nothing — the table effectively
disappears, leaving only an unreadable blob of numbers and rules.

Add a custom renderer for _handle_strategies_list that:

• Replaces conIds with looked-up symbols when a local universe maps them.
• Truncates long lists as "N: first,second,third, +M more" with a count.
• Renders state as colored ON / off.
• Compacts params to "KEY=val, KEY=val".
• Lays the table out with explicit ratio columns so symbols/params share
  the wide space and name/state/bar/hist stay legible.

Falls back gracefully when the universe lookup fails (raw conIds shown).

Verified live against four deployed strategies including a 30-symbol
ai_momentum entry — all rows render with names, states, bar sizes,
symbol counts and params visible in a single readable table.