Migrate panto CLI onto the public.zig surface

Move the CLI off the internal libpanto module namespaces onto the curated
public API: data-type aliases (Config family, Message/MessageRole/
effectiveSystemBlocks, Event, Pricing/PricingRegistry, the session seam,
FileSystemJSONLStore, ContentBlockType), process lifecycle (panto.init/
deinit), and ResultParts.fromText/fromTextOwned/deinit in place of the
freestanding textResult/ownedTextResult/freeResultParts.

The CLI remains on two flagged internal namespaces, panto.agent and
panto.conversation: it is a deep embedder that drives the loop below the
curated Agent/Conversation facades (system-prompt seeding through the
agent, compaction_system_prompt, the open_stream_fn test seam, standalone
Conversation values, compactAndPersist). These stay re-exported from
public.zig as a documented deep-embedder escape hatch; trimming the
transitional block removed every other internal re-export.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/extension_loader.zig b/src/extension_loader.zig
index 6d470cc..ff49022 100644
--- a/src/extension_loader.zig
+++ b/src/extension_loader.zig
@@ -507,7 +507,7 @@ fn xokText(result: panto.ToolCallResult) []const u8 {
 /// Test helper: free a results slice (parts on `.ok`).
 fn xfreeResults(results: []panto.ToolCallResult) void {
     for (results) |r| switch (r) {
-        .ok => |b| panto.freeResultParts(testing.allocator, b),
+        .ok => |b| (panto.ResultParts{ .items = b }).deinit(testing.allocator),
         .err => {},
     };
 }