feat(console): parameter builder in the command explorer (phase 3)

The detail pane's Parameters section is now an editable form: each parameter is
a type-hinted input field (string / number / json, optional marked), and a live
"Builds" preview shows the command being assembled. String values are
auto-quoted; a required field left empty keeps its placeholder and disables
"Insert & run"; trailing empty optionals are omitted.

Insert and Insert & run now use the assembled command (not just the template),
so Insert & run works for parameterized commands once the required fields are
filled — destructive commands still confirm first. Param fields reset when the
selected command changes or the modal opens. Keyboard nav (Up/Down/Enter) is
scoped to the search box so typing in a field doesn't move the selection.

A best-effort parseParamSpecs turns the human-readable param templates into
fields; JSON-array params (z_sendmany, createrawtransaction) surface as a single
"json" field the user pastes into. Adds the console_ref_builds label + 8
translations.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/ui/windows/console_tab.h

@@ -193,6 +193,8 @@ private:
     int  cmd_sel_idx_ = -1;            // detail-pane selection: command index within that category
     std::string pending_submit_;      // command to run next frame (deferred so the modal needs no executor)
     const ConsoleCommandEntry* run_confirm_cmd_ = nullptr;  // destructive "Insert & run" awaiting confirmation
+    char cmd_param_bufs_[6][256] = {{0}};                   // parameter-builder input fields
+    const ConsoleCommandEntry* cmd_param_owner_ = nullptr;  // command the param buffers currently hold
 };
 
 } // namespace ui