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/model/msglog/schema.rs

@@ -0,0 +1,47 @@
+use rusqlite::Connection;
+use anyhow::Result;
+
+pub fn init_schema(conn: &Connection) -> Result<()> {
+    conn.execute_batch(
+        "
+        CREATE TABLE IF NOT EXISTS messages (
+            id INTEGER PRIMARY KEY AUTOINCREMENT,
+            session_id TEXT NOT NULL,
+            role TEXT NOT NULL,
+            content TEXT,
+            tool_call_id TEXT,
+            tool_name TEXT,
+            tool_arguments TEXT,
+            created_at INTEGER NOT NULL,
+            FOREIGN KEY (session_id) REFERENCES archives(session_id)
+        );
+
+        CREATE TABLE IF NOT EXISTS archives (
+            id INTEGER PRIMARY KEY AUTOINCREMENT,
+            session_id TEXT NOT NULL UNIQUE,
+            title TEXT,
+            model TEXT,
+            created_at INTEGER NOT NULL,
+            updated_at INTEGER NOT NULL,
+            message_count INTEGER DEFAULT 0,
+            token_count INTEGER DEFAULT 0,
+            summary TEXT
+        );
+
+        CREATE INDEX IF NOT EXISTS idx_messages_session_id ON messages(session_id);
+        CREATE INDEX IF NOT EXISTS idx_messages_created_at ON messages(created_at);
+        CREATE INDEX IF NOT EXISTS idx_archives_created_at ON archives(created_at);
+
+        CREATE TABLE IF NOT EXISTS blobs (
+            id INTEGER PRIMARY KEY AUTOINCREMENT,
+            session_id TEXT NOT NULL,
+            blob_key TEXT NOT NULL,
+            data BLOB NOT NULL,
+            mime_type TEXT,
+            created_at INTEGER NOT NULL,
+            UNIQUE(session_id, blob_key)
+        );
+        "
+    )?;
+    Ok(())
+}