docs(guides): fix stale src/models.py refs + line-number drift across 11 guides

Sweep of the per-source-file guides + Readme.md for stale references
to src/models.py as the data model home. models.py is now a ~1.5KB
re-export shim per module_taxonomy_refactor_20260627; dataclasses
moved to src/mma.py, src/project_files.py, src/type_aliases.py,
src/mcp_tool_specs.py, src/result_types.py, src/context_presets.py,
src/workspace_manager.py, src/personas.py.

- guide_gui_2.md: _gui_func line 754->1062; render_main_interface
  line 1259->1898.
- python.md §10 exemption table: App gui_2.py:307->314; AppController
  795->801; RAGEngine 123->125; HookServer 856->941;
  HookServerInstance 130->171; HookHandler 155->208;
  WebSocketServer 908->993.
- guide_multi_agent_conductor.md: Ticket now in src/mma.py (not
  models.py); ConductorEngine 116+->112+; WorkerPool 50-114->52-110.
- guide_agent_memory_dimensions.md: FileItem ref models.py:510-559
  -> src/project_files.py.
- guide_context_aggregation.md: FileItem + ContextPreset refs ->
  src/project_files.py + src/context_presets.py; ai_client _send_*
  count 5->8.
- guide_discussions.md: parse_history_entries now in src/mma.py;
  ContextPreset/FileItem cross-refs updated.
- guide_personas.md: Persona now in src/personas.py; import example
  updated.
- guide_rag.md: RAGConfig now in src/mcp_client.py.
- guide_workspace_profiles.md: WorkspaceProfile now in
  src/workspace_manager.py.
- guide_mma.md: Data Structures section notes src/mma.py as the live
  location.
- Readme.md: MMA Engine + Data Models rows updated for the
  models.py shim reality + 8 providers + mma_exec deprecation.
- guide_ai_client.md: '5 provider SDKs'->8 (added note); PROVIDERS
  line 56->62; __getattr__ re-export line 261->31; provider
  switching examples use real registered model names (claude-sonnet-
  4-5, MiniMax-M2, gemini-2.5-flash, qwen-plus, grok-2, llama-3.1);
  _provider union lists all 8 providers.

docs/Readme.md

@@ -35,8 +35,8 @@ This documentation suite provides comprehensive technical reference for the Manu
 | [API Hooks](guide_api_hooks.md) | `src/api_hooks.py` + `src/api_hook_client.py` reference: HookServer on `127.0.0.1:8999`, ApiHookClient Python wrapper, 8+ endpoints (`/status`, `/api/gui`, `/api/ask`, `/api/gui/mma_status`, `/api/performance`, `/api/comms`, `/api/diagnostics`), Remote Confirmation Protocol via `/api/ask` (synchronous blocking HITL), `custom_callback` action for invoking any registered App method |
 | [MCP Client](guide_mcp_client.md) | `src/mcp_client.py` reference: 45 native tools (File I/O, Python AST, C/C++ AST, Analysis, Network, Runtime, Beads), 3-layer security model (Allowlist Construction, Path Validation, Resolution Gate), `dispatch()`/`async_dispatch()` entry points, ExternalMCPManager for external MCP servers (Stdio + SSE), JSON-RPC 2.0 engine, public API, configuration |
 | [App Controller](guide_app_controller.md) | `src/app_controller.py` reference: headless orchestrator owning AppState and all subsystem managers (PresetManager, PersonaManager, ContextPresetManager, ToolPresetManager, ToolBiasEngine, RAGEngine, HistoryManager, WorkspaceManager, HookServer, HotReloader, PathManager), `_predefined_callbacks` and `_gettable_fields` registries for Hook API, SyncEventQueue bridge, preset/persona/context coordination, headless mode |
-| [MMA Engine](guide_multi_agent_conductor.md) | `src/multi_agent_conductor.py` + `src/dag_engine.py` reference: TrackDAG with cycle detection (iterative DFS) and topological sort (Kahn's variant), ExecutionEngine with Auto-Queue / Step Mode state machine, MultiAgentConductor with WorkerPool (configurable concurrency, default 4), mma_exec.py sub-agent invocation for Token Firewall, parse_plan_md utility, Beads mode delegation |
-| [Data Models](guide_models.md) | `src/models.py` reference: centralized data model registry using pydantic + dataclasses, model categories (Core, AI, Preset, Persona, Context, MMA, UI State, Logging, Hook, Workspace, RAG), `AGENT_TOOL_NAMES` canonical 45-tool list, `PROVIDERS` constant, `parse_plan_md` utility, validation patterns, SDM tags, serialization strategies (TOML, JSON-L) |
+| [MMA Engine](guide_multi_agent_conductor.md) | `src/multi_agent_conductor.py` + `src/dag_engine.py` reference: TrackDAG with cycle detection (iterative DFS) and topological sort (Kahn's variant), ExecutionEngine with Auto-Queue / Step Mode state machine, MultiAgentConductor with WorkerPool (configurable concurrency, default 4), the WorkerPool's internal `run_worker_lifecycle` subprocess template (NOT the meta-tooling `mma_exec.py` — that's deprecated; see `guide_meta_boundary.md`), parse_plan_md utility (now in `src/mma.py`), Beads mode delegation |
+| [Data Models](guide_models.md) | `src/models.py` is now a ~1.5KB legacy re-export shim (`Metadata = TrackMetadata` alias + `PROVIDERS` lazy `__getattr__`). Data models moved to per-system files per `module_taxonomy_refactor_20260627`: `src/mma.py` (TrackMetadata, Ticket, Track, WorkerContext), `src/project_files.py` (FileItem), `src/type_aliases.py` (typed boundary + per-aggregate dataclasses: Metadata, CommsLogEntry, HistoryMessage, ToolDefinition, SessionInsights, DiscussionSettings, CustomSlice, MMAUsageStats, ProviderPayload, UIPanelConfig, PathInfo, FileItemsDiff, JsonPrimitive/JsonValue), `src/mcp_tool_specs.py` (typed ToolSpec registry, 45 tools), `src/result_types.py` (Result[T], ErrorInfo, ErrorKind). `VendorCapabilities` lives in `src/ai_client.py` `#region: Vendor Capabilities`. `PROVIDERS` constant in `src/ai_client.py` (8 providers: gemini, anthropic, gemini_cli, deepseek, minimax, qwen, grok, llama). |
 | [Discussions](guide_discussions.md) | The Discussion system: 23-operation matrix A1-A7 (per-entry) + B1-B11 (discussion-level) + C1-C5 (undo/redo), Take naming convention (`<base>_take_<n>`), branching at any entry (`project_manager.branch_discussion`), promotion to top-level (`project_manager.promote_take`), user-managed role list (`app.disc_roles`), per-role filter linked to MMA persona focus, `_disc_entries_lock` thread-safety contract, Hook API session endpoints |
 | [State Lifecycle](guide_state_lifecycle.md) | Undo/redo via `HistoryManager` + `UISnapshot` (13 captured fields, 100-snapshot capacity, debounced change detection at render frame), reset flow (`_handle_reset_session` — clears 30+ fields, replaces project, preserves `active_project_path` per the 2026-06-08 regression fix), `App.__getattr__`/`__setattr__` state delegation to Controller, 8-thread io_pool with 11 lock-protected regions (per `IO_POOL_MAX_WORKERS = 8` in `src/io_pool.py:20`; bumped 4→8 in 4a338486 on 2026-06-06), hot-reload integration |
 | [Context Aggregation](guide_context_aggregation.md) | The `aggregate.py` (518-line) pipeline: 3 aggregation strategies (`auto`/`summarize`/`full`), 7 per-file view modes (`full`/`summary`/`skeleton`/`outline`/`masked`/`custom`/`none`), full `FileItem` schema (9 fields + `__post_init__` normalizer), `ContextPreset` schema and `ContextPresetManager`, Tier 3 worker variant (`build_tier3_context` with FuzzyAnchor re-resolution and focus-file handling), `force_full`/`auto_aggregate` short-circuits, output file numbering, cache strategy (static prefix + dynamic history) |