Fix watch mode missing events for short-lived sessions

The file_sizes cache in process_file_with_ts's None branch was recording
meta.len() at the time of the check, which could be larger than what was
actually processed by process_lines_streaming. This caused subsequent
watch events to skip the file via the current_size == cached_size fast
path, permanently missing data for files that stopped growing.

This primarily affected Codex sessions (short-lived, file stops growing
quickly) but could also affect Claude Code for short conversations.

Fix: do not cache file size when no complete lines were processed. The
next watch event will re-attempt processing without a stale cache entry.

Bump version to 1.1.2.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: korjwl1

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "toki"
-version = "1.1.1"
+version = "1.1.2"
 edition = "2021"
 description = "AI CLI tool token usage tracker module"
 license = "FSL-1.1-Apache-2.0"

src/engine.rs

@@ -463,9 +463,13 @@ impl TrackerEngine {
 
         match result {
             None => {
-                if let Ok(meta) = std::fs::metadata(path) {
-                    self.file_sizes.insert(path_owned.clone(), meta.len());
-                }
+                // Do NOT cache file size here. process_lines_streaming found no
+                // complete lines, but the file may have grown since it was opened
+                // (concurrent writes). Caching meta.len() now would record a size
+                // larger than what was actually processed, causing the next watch
+                // event to skip the file via the current_size == cached_size check.
+                // By leaving file_sizes un-cached, the next event will re-read and
+                // re-attempt processing.
                 let act = self.activity.entry(path_owned).or_insert(FileActivity {
                     state, last_active: now, last_checked: now,
                 });
@@ -564,9 +568,8 @@ impl TrackerEngine {
 
         match result {
             None => {
-                if let Ok(meta) = std::fs::metadata(path) {
-                    self.file_sizes.insert(path_owned.clone(), meta.len());
-                }
+                // Do NOT cache file size here — same race condition as the legacy
+                // path above. See comment there for details.
                 let act = self.activity.entry(path_owned).or_insert(FileActivity {
                     state, last_active: now, last_checked: now,
                 });