fix(claudbg-0yk4,claudbg-zniv): populate msg count and project path from DB in TUI

Query the DB cache on TUI startup to enrich SessionListItems with
message_count and fallback project_path for sessions whose JSONL
first line lacks a cwd field.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.beans/claudbg-0yk4--tui-session-message-count-always-shows-0.md

@@ -1,10 +1,15 @@
 ---
 # claudbg-0yk4
 title: 'TUI: session message count always shows 0'
-status: todo
+status: completed
 type: bug
+priority: normal
 created_at: 2026-03-31T23:45:03Z
-updated_at: 2026-03-31T23:45:03Z
+updated_at: 2026-04-01T05:49:51Z
 ---
 
 In the TUI session list, the message count column always shows 0. The message count is not being populated from the database or computed correctly for the TUI.
+
+## Summary of Changes
+
+In `src/tui/run.rs`: after building the session list from disk discovery, open the DB and query `session_id, COALESCE(project_path, ''), message_count` from the sessions table. Use `tokio::task::block_in_place` to run the async DB query from the synchronous TUI startup. Populate `msg_count` on each `SessionListItem` from the DB result.

.beans/claudbg-zniv--tui-some-sessions-show-no-project-path-in-session.md

@@ -1,12 +1,17 @@
 ---
 # claudbg-zniv
 title: 'TUI: some sessions show no project path in session list'
-status: todo
+status: completed
 type: bug
+priority: normal
 created_at: 2026-03-31T23:44:55Z
-updated_at: 2026-03-31T23:44:55Z
+updated_at: 2026-04-01T05:49:51Z
 blocking:
     - claudbg-9627
 ---
 
 In the TUI session list, some sessions do not display a project path. Likely related to the same root cause as the CLI bug (claudbg-9627).
+
+## Summary of Changes
+
+Implemented together with claudbg-0yk4 in `src/tui/run.rs`. When `sr.project_path` from disk discovery is empty (cwd not present in first JSONL line), fall back to the `project_path` stored in the DB sessions table (which is populated during `claudbg index` sync by scanning all JSONL entries).

src/tui/run.rs

@@ -9,6 +9,7 @@
 //! 4. Tears down the terminal (disable raw mode, leave alternate screen) via
 //!    an RAII guard, so cleanup happens even if an error is returned.
 
+use std::collections::HashMap;
 use std::io::{self, Stdout};
 use std::time::Duration;
 
@@ -222,6 +223,52 @@ pub fn run_tui() -> Result<()> {
         })
         .collect();
 
+    // Enrich session list with data from the DB cache (message counts and
+    // fallback project paths for sessions whose JSONL first line has no cwd).
+    // Best-effort: silently skip if the DB is missing or unreadable.
+    let db_enrichment: HashMap<String, (String, usize)> = tokio::task::block_in_place(|| {
+        tokio::runtime::Handle::current().block_on(async {
+            let db_path = crate::db::connection::default_db_path();
+            let db = match crate::db::connection::open_db(&db_path, false).await {
+                Ok(d) => d,
+                Err(_) => return HashMap::new(),
+            };
+            let conn = match db.connect() {
+                Ok(c) => c,
+                Err(_) => return HashMap::new(),
+            };
+            let mut rows = match conn
+                .query(
+                    "SELECT session_id, COALESCE(project_path, ''), message_count FROM sessions",
+                    (),
+                )
+                .await
+            {
+                Ok(r) => r,
+                Err(_) => return HashMap::new(),
+            };
+            let mut map: HashMap<String, (String, usize)> = HashMap::new();
+            while let Ok(Some(row)) = rows.next().await {
+                let sid: String = match row.get(0) {
+                    Ok(v) => v,
+                    Err(_) => continue,
+                };
+                let project: String = row.get(1).unwrap_or_default();
+                let count: i64 = row.get(2).unwrap_or(0);
+                map.insert(sid, (project, count as usize));
+            }
+            map
+        })
+    });
+    for item in &mut state.sessions {
+        if let Some((db_project, db_count)) = db_enrichment.get(&item.full_id) {
+            if item.project.is_empty() && !db_project.is_empty() {
+                item.project = db_project.clone();
+            }
+            item.msg_count = *db_count;
+        }
+    }
+
     loop {
         // Load transcript data lazily when entering a transcript screen.
         maybe_load_transcript(&mut state);