Document settings hubs and diagnostics in gui_2.py and complete track

Add SQLite-style inline docstrings to render_ai_settings_hub, render_agent_tools_panel, and render_diagnostics_panel under simplified granularity per user request. Mark track sqlite_docs_gui_2_20260612 as complete.

src/gui_2.py

@@ -1844,6 +1844,20 @@ def render_usage_analytics_panel(app: App) -> None:
  if app.perf_profiling_enabled: app.perf_monitor.end_component("_render_usage_analytics_panel")
 
 def render_diagnostics_panel(app: App) -> None:
+ """
+  Renders the Diagnostics panel, displaying performance telemetry metrics.
+  Shows frame time, FPS, event queue throughput, and memory usage.
+
+  State Mutations:
+    Updates app.perf_profiling_enabled and visibility in app.show_windows["Diagnostics"].
+
+  DAG Context / Render Flow:
+    Called by: render_main_interface()
+    Calls: app.perf_monitor.get_metrics()
+
+  Threading & Safety:
+    Must run synchronously on the Main Thread.
+  """
  if app.perf_profiling_enabled: app.perf_monitor.start_component("_render_diagnostics_panel")
  with imscope.window("Diagnostics", app.show_windows.get("Diagnostics", False)) as (exp, opened):
   app.show_windows["Diagnostics"] = bool(opened)
@@ -2339,6 +2353,22 @@ def render_path_field(label: str, attr: str, key: str, tooltip: str):
 #region: AI Settings
 
 def render_ai_settings_hub(app: App) -> None:
+ """
+ Groups and renders all AI-related configuration panels in a unified hub sidebar.
+ Includes persona selection, LLM provider settings, system prompts, RAG switches, and tools.
+
+ State Mutations:
+   None directly (delegated to child panels).
+
+ DAG Context / Render Flow:
+   Called by: render_main_interface()
+   Calls: render_persona_selector_panel(), render_provider_panel(),
+          render_system_prompts_panel(), render_rag_panel(),
+          render_agent_tools_panel()
+
+ Threading & Safety:
+   Must run synchronously on the Main Thread.
+ """
  render_persona_selector_panel(app)
  if imgui.collapsing_header("Provider & Model"): render_provider_panel(app)
  if imgui.collapsing_header("System Prompts"):   render_system_prompts_panel(app)
@@ -2435,6 +2465,20 @@ def render_system_prompts_panel(app: App) -> None:
  ch, app.ui_project_system_prompt = imgui.input_text_multiline("##psp", app.ui_project_system_prompt, imgui.ImVec2(-1, 100))
 
 def render_agent_tools_panel(app: App) -> None:
+ """
+ Renders active tool presets and configuration options.
+ Allows selecting tool presets, toggling individual capability flags, and showing bias managers.
+
+ State Mutations:
+   Modifies app.ui_active_tool_preset and local UI flags.
+
+ DAG Context / Render Flow:
+   Called by: render_ai_settings_hub()
+   Calls: app._get_active_capabilities()
+
+ Threading & Safety:
+   Must run synchronously on the Main Thread.
+ """
  caps = app._get_active_capabilities()
  if not caps.tool_calling:
   if imgui.collapsing_header("Active Tool Presets & Biases", imgui.TreeNodeFlags_.default_open):