rebrand to notevi: one CLI over the jj sidecar

vr and vrsite become a single binary. vrsite/ folds into a web package in
one module (0x4200.cafe/notevi); "notevi web" serves and exports exactly
what vrsite did, and "notevi read/grep/note/query" is unchanged.

The sidecar is renamed with it: notevi_log, notevi-log.jsonl, and the
description "private: notevi log". The pre-rebrand names are still
recognized, so an old repository opens and reads; it is renamed in place
on the first write, or up front with "notevi migrate DIR...".

That rename cannot be a single mv inside jj run. jj only auto-tracks a
*new* file in the run working copy below a size limit it does not take
from the command line, so writing a whole log under a name the change has
never held is silently dropped while jj reports success. ensureLogFile
creates the file empty first and lets every later byte be a modification
of a tracked file, which snapshots at any size; that also fixes the same
latent bug when importing a large legacy vr-log.jsonl.

Adds a bem-te-vi mark (favicon and nav brand) and a README.

Co-Authored-By: Claude Opus 5 (1M context) <[email protected]>

1 files changed, 57 insertions, 0 deletions

diff --git a/web/web_test.go b/web/web_test.go
new file mode 100644
index 0000000..3986cdc
--- /dev/null
+++ b/web/web_test.go
@@ -0,0 +1,57 @@
+package web
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+	"time"
+)
+
+func TestWatchLogDebouncesChanges(t *testing.T) {
+	logPath := filepath.Join(t.TempDir(), "trace.jsonl")
+	if err := os.WriteFile(logPath, []byte("initial\n"), 0o644); err != nil {
+		t.Fatal(err)
+	}
+
+	done := make(chan struct{})
+	stopped := make(chan struct{})
+	rebuilt := make(chan struct{}, 2)
+	go func() {
+		defer close(stopped)
+		watchLogUntil(newFileLog(logPath), 60*time.Millisecond, 5*time.Millisecond, done, func() {
+			rebuilt <- struct{}{}
+		})
+	}()
+	time.Sleep(20 * time.Millisecond)
+
+	if err := os.WriteFile(logPath, []byte("first change\n"), 0o644); err != nil {
+		t.Fatal(err)
+	}
+	time.Sleep(30 * time.Millisecond)
+	if err := os.WriteFile(logPath, []byte("second change\n"), 0o644); err != nil {
+		t.Fatal(err)
+	}
+
+	select {
+	case <-rebuilt:
+		t.Fatal("rebuilt before the debounce interval elapsed")
+	case <-time.After(40 * time.Millisecond):
+	}
+	select {
+	case <-rebuilt:
+	case <-time.After(200 * time.Millisecond):
+		t.Fatal("did not rebuild after changes settled")
+	}
+	select {
+	case <-rebuilt:
+		t.Fatal("multiple changes produced more than one rebuild")
+	case <-time.After(40 * time.Millisecond):
+	}
+
+	close(done)
+	select {
+	case <-stopped:
+	case <-time.After(time.Second):
+		t.Fatal("watcher did not stop")
+	}
+}