Add stats totals, runtime summary, and duplicate detection on add form

- Stats page now shows total films watched and total runtime (formatted
  as Xd Yh) in an overview panel above the world map
- /stats/data endpoint includes total_runtime_minutes in payload
- New GET /films/find endpoint returns all shelf matches for a tmdb_id
- Add film form shows an inline notice when the selected TMDB film is
  already logged, with shelf name, date, and a link to the entry
- Update CLAUDE.md and README to reflect current auth, OMDb, and
  router/service structure

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

1 files changed, 11 insertions, 0 deletions

diff --git a/static/styles.css b/static/styles.css
index 9f8619b..2a6cd04 100644
--- a/static/styles.css
+++ b/static/styles.css
@@ -687,6 +687,11 @@ textarea:focus {
   margin-top: 12px;
 }
 
+#duplicate-notice {
+  margin-top: 12px;
+  margin-bottom: 0;
+}
+
 .tmdb-result {
   display: grid;
   grid-template-columns: 38px minmax(0, 1fr);
@@ -927,6 +932,12 @@ textarea:focus {
   background: linear-gradient(90deg, rgba(240, 184, 77, 0.4), var(--accent));
 }
 
+.stats-overview-row {
+  display: flex;
+  gap: 40px;
+  flex-wrap: wrap;
+}
+
 .stats-metric {
   display: grid;
   gap: 8px;