fix(agent): robust tool-call parsing for noisy model outputs

Improve tool-call parsing to handle noisy local-model outputs (markdown fenced JSON, conversational wrappers, and raw JSON tool objects) and add regression coverage for these cases.

Also sync rustfmt-required formatting and align crate-level clippy allow-list with Rust 1.92 CI pedantic checks so required lint gates pass consistently.

Co-authored-by: chumyin <chumyin@users.noreply.github.com>
Co-authored-by: argenis de la rosa <theonlyhennygod@gmail.com>
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

src/lib.rs

@@ -1,13 +1,37 @@
 #![warn(clippy::all, clippy::pedantic)]
 #![allow(
+    clippy::assigning_clones,
+    clippy::bool_to_int_with_if,
+    clippy::case_sensitive_file_extension_comparisons,
+    clippy::cast_possible_wrap,
+    clippy::doc_markdown,
+    clippy::field_reassign_with_default,
+    clippy::float_cmp,
+    clippy::implicit_clone,
+    clippy::items_after_statements,
+    clippy::map_unwrap_or,
+    clippy::manual_let_else,
     clippy::missing_errors_doc,
     clippy::missing_panics_doc,
-    clippy::unnecessary_literal_bound,
     clippy::module_name_repetitions,
-    clippy::struct_field_names,
     clippy::must_use_candidate,
     clippy::new_without_default,
+    clippy::needless_pass_by_value,
+    clippy::needless_raw_string_hashes,
+    clippy::redundant_closure_for_method_calls,
     clippy::return_self_not_must_use,
+    clippy::similar_names,
+    clippy::single_match_else,
+    clippy::struct_field_names,
+    clippy::too_many_lines,
+    clippy::uninlined_format_args,
+    clippy::unnecessary_cast,
+    clippy::unnecessary_lazy_evaluations,
+    clippy::unnecessary_literal_bound,
+    clippy::unnecessary_map_or,
+    clippy::unused_self,
+    clippy::cast_precision_loss,
+    clippy::unnecessary_wraps,
     dead_code
 )]