Enhance tool documentation and add new features

- Added module-level documentation for memory tools (`remember`, `recall`, `forget`) to clarify their purpose.
- Improved documentation in `recall.rs` and `remember.rs` to describe the functionality and flow of memory entry operations.
- Updated `mod.rs` to include descriptions for the tool trait and execution context.
- Enhanced `plan.rs` with detailed comments on plan-mode signaling tools.
- Documented text search tools in `search.rs` to explain their functionality.
- Improved sequential-thinking tool documentation in `seqthink.rs`.
- Added safety filter documentation in `shell_filter` for credential and git operations.
- Enhanced utility tools documentation, including `cd`, `dir_cache_update`, and `todowrite`.
- Improved rendering documentation in view modules (`chat`, `markdown`, `status`, `workflow`) to clarify rendering flows and purposes.

src/view/workflow.rs

@@ -1,3 +1,14 @@
+//! Workflow status panel rendering.
+//!
+//! Flow: `draw_workflow_panel` reads `state.session_runtime` and
+//! `state.workflow_engine` and renders a compact `List` of counters
+//! (messages, completed/pending tool calls, active bash jobs, agents,
+//! findings) plus the current auto-run phase.
+//!
+//! Why: shows a placeholder panel when there is no active session
+//! runtime, and only emits rows for counters that are nonzero, to keep
+//! the panel compact during simple single-turn sessions.
+
 use ratatui::layout::Rect;
 use ratatui::style::{Style, Modifier};
 use ratatui::text::{Line, Span};
@@ -5,6 +16,18 @@ use ratatui::widgets::{Block, Borders, List, ListItem};
 use ratatui::Frame;
 use super::theme::Theme;
 
+/// Render the workflow status panel summarizing the active session runtime.
+///
+/// Flow: bail out with a "No active session" placeholder if
+/// `state.session_runtime` is None → otherwise build a list of status
+/// lines (message count, completed/pending tool calls, active bash jobs,
+/// agent/finding counts, auto-run phase) → render as a List widget.
+///
+/// Why: rows for pending tool queue, bash jobs, agents, and findings are
+/// only shown when their count is nonzero, to keep the panel compact
+/// during simple single-turn sessions.
+///
+/// Return: nothing; draws directly into `frame` at `area`.
 pub fn draw_workflow_panel(frame: &mut Frame, area: Rect, state: &crate::app::state::rest::AppStateRest) {
     let block = Block::default()
         .borders(Borders::ALL)