Implement chat and markdown views, enhance status bar, and add workflow panel

- Added `chat.rs` for rendering chat messages with timestamps and roles.
- Introduced `markdown.rs` for rendering markdown content with styling.
- Created `status.rs` to display the application status bar with session and message counts.
- Developed `workflow.rs` to show the current workflow status, including tool calls and active jobs.
- Established a `theme.rs` for centralized color management across the UI.
- Updated `mod.rs` to include new modules and manage rendering logic.

src/tool/search.rs

@@ -0,0 +1,147 @@
+use std::fs;
+use serde_json::{json, Value};
+use anyhow::{Result, anyhow};
+use ignore::Walk;
+use globset::{GlobBuilder, GlobSetBuilder};
+use super::Tool;
+use super::ToolCtx;
+use super::resolve_path;
+
+pub struct Grep;
+
+impl Tool for Grep {
+    fn name(&self) -> &'static str {
+        "grep"
+    }
+
+    fn description(&self) -> &'static str {
+        "Search for a pattern in files using recursive text search"
+    }
+
+    fn parameters(&self) -> Value {
+        json!({
+            "type": "object",
+            "properties": {
+                "pattern": {
+                    "type": "string",
+                    "description": "Text pattern to search for"
+                },
+                "path": {
+                    "type": "string",
+                    "description": "Path to search in (relative to workspace root)"
+                }
+            },
+            "required": ["pattern", "path"]
+        })
+    }
+
+    fn run(&self, ctx: &ToolCtx, args: &Value) -> Result<String> {
+        let pattern = args.get("pattern")
+            .and_then(|v| v.as_str())
+            .ok_or_else(|| anyhow!("missing required argument: pattern"))?
+            .to_string();
+        let rel = args.get("path")
+            .and_then(|v| v.as_str())
+            .ok_or_else(|| anyhow!("missing required argument: path"))?
+            .to_string();
+        let path = resolve_path(&ctx.workspaces, &rel)?;
+        if !path.exists() {
+            anyhow::bail!("path '{}' does not exist", rel);
+        }
+        if !path.is_dir() {
+            anyhow::bail!("path '{}' is not a directory", rel);
+        }
+        let mut results: Vec<(String, usize, String)> = Vec::new();
+        for entry in Walk::new(&path).flatten() {
+            let file_path = entry.path();
+            if !file_path.is_file() {
+                continue;
+            }
+            if let Ok(content) = fs::read_to_string(file_path) {
+                for (i, line) in content.lines().enumerate() {
+                    if line.contains(&pattern) {
+                        let rel_path = file_path.strip_prefix(&path)
+                            .unwrap_or(file_path)
+                            .display()
+                            .to_string();
+                        results.push((rel_path, i + 1, line.to_string()));
+                    }
+                }
+            }
+        }
+        if results.is_empty() {
+            return Ok(format!("no matches found for '{}' in {}", pattern, rel));
+        }
+        let output = results.iter()
+            .map(|(f, line, text)| format!("{}:{}:{}", f, line, text))
+            .collect::<Vec<_>>()
+            .join("\n");
+        Ok(format!("found {} matches:\n{}", results.len(), output))
+    }
+}
+
+pub struct Glob;
+
+impl Tool for Glob {
+    fn name(&self) -> &'static str {
+        "glob"
+    }
+
+    fn description(&self) -> &'static str {
+        "List files matching a glob pattern"
+    }
+
+    fn parameters(&self) -> Value {
+        json!({
+            "type": "object",
+            "properties": {
+                "pattern": {
+                    "type": "string",
+                    "description": "Glob pattern to match files (e.g. '**/*.rs')"
+                },
+                "path": {
+                    "type": "string",
+                    "description": "Root path to search from (relative to workspace root)"
+                }
+            },
+            "required": ["pattern", "path"]
+        })
+    }
+
+    fn run(&self, ctx: &ToolCtx, args: &Value) -> Result<String> {
+        let pat_str = args.get("pattern")
+            .and_then(|v| v.as_str())
+            .ok_or_else(|| anyhow!("missing required argument: pattern"))?
+            .to_string();
+        let rel = args.get("path")
+            .and_then(|v| v.as_str())
+            .ok_or_else(|| anyhow!("missing required argument: path"))?
+            .to_string();
+        let root = resolve_path(&ctx.workspaces, &rel)?;
+        if !root.exists() || !root.is_dir() {
+            anyhow::bail!("path '{}' is not a valid directory", rel);
+        }
+        let mut builder = GlobSetBuilder::new();
+        let full_pattern = root.join(&pat_str).display().to_string();
+        builder.add(GlobBuilder::new(&full_pattern).build()
+            .map_err(|e| anyhow!("invalid glob pattern '{}': {}", pat_str, e))?);
+        let glob_set = builder.build()
+            .map_err(|e| anyhow!("failed to build glob set: {}", e))?;
+        let mut matches: Vec<String> = Vec::new();
+        for entry in Walk::new(&root).flatten() {
+            let p = entry.path();
+            if glob_set.is_match(p) {
+                let rel_path = p.strip_prefix(&root)
+                    .unwrap_or(p)
+                    .display()
+                    .to_string();
+                matches.push(format!("{}{}", rel_path, if p.is_dir() { "/" } else { "" }));
+            }
+        }
+        matches.sort();
+        if matches.is_empty() {
+            return Ok(format!("no files match '{}' in {}", pat_str, rel));
+        }
+        Ok(matches.join("\n"))
+    }
+}