Show the full 127-unit tray tooltip by setting cbSize in a vendored tray-icon

Cargo.toml

@@ -4,6 +4,7 @@ members = [
     "apps/desktop-tauri/src-tauri",
 ]
 default-members = ["apps/desktop-tauri/src-tauri"]
+exclude = ["vendor/tray-icon"]
 resolver = "3"
 
 [workspace.lints.clippy]
@@ -12,3 +13,8 @@ let_underscore_must_use = "deny"
 undocumented_unsafe_blocks = "deny"
 cast_possible_truncation = "deny"
 cast_possible_wrap = "deny"
+
+# tray-icon 0.21.3 leaves NOTIFYICONDATAW.cbSize zeroed, so Explorer reads the
+# legacy layout and cuts tray tooltips at 64 UTF-16 units. See vendor/tray-icon/PATCHED.md.
+[patch.crates-io]
+tray-icon = { path = "vendor/tray-icon" }

apps/desktop-tauri/src-tauri/src/tray_bridge.rs

@@ -482,11 +482,11 @@ fn build_tooltip(
     format!("CodexBar\n{}", lines.join("\n"))
 }
 
-/// `NOTIFYICONDATAW.szTip` holds 128 UTF-16 units, but tray-icon 0.21 leaves
-/// `cbSize` zeroed, so Explorer reads the pre-Windows 2000 layout and shows
-/// only the first 64 units, cutting mid-line without a marker. 63 leaves room
-/// for the terminating NUL of that legacy `szTip[64]`.
-const TRAY_TOOLTIP_MAX_UTF16: usize = 63;
+/// `NOTIFYICONDATAW.szTip` holds 128 UTF-16 units; 127 leaves room for the
+/// terminating NUL. The full buffer is only honoured because the vendored
+/// tray-icon sets `cbSize` (see `vendor/tray-icon/PATCHED.md`); with a zeroed
+/// `cbSize` Explorer falls back to the legacy 64-unit tip.
+const TRAY_TOOLTIP_MAX_UTF16: usize = 127;
 
 fn utf16_len(text: &str) -> usize {
     text.encode_utf16().count()
@@ -1056,9 +1056,6 @@ mod tests {
         assert!(japanese_label.contains("リセットまで"), "{japanese_label}");
     }
 
-    /// The full `szTip[128]` budget, so layout tests can use realistic line lengths.
-    const WIDE_BUDGET: usize = 127;
-
     #[test]
     fn fit_tooltip_keeps_short_tooltips_unchanged() {
         let tooltip = "CodexBar\nClaude: 87% left\nCodex: 92% left";
@@ -1075,9 +1072,9 @@ mod tests {
         }
         let tooltip = lines.join("\n");
 
-        let fitted = fit_tooltip(&tooltip, WIDE_BUDGET);
+        let fitted = fit_tooltip(&tooltip, TRAY_TOOLTIP_MAX_UTF16);
 
-        assert!(utf16_len(&fitted) <= WIDE_BUDGET, "{fitted}");
+        assert!(utf16_len(&fitted) <= TRAY_TOOLTIP_MAX_UTF16, "{fitted}");
         let shown: Vec<&str> = fitted.split('\n').collect();
         assert_eq!(shown[0], "CodexBar", "{fitted}");
         assert!(shown.len() > 2, "{fitted}");
@@ -1095,9 +1092,9 @@ mod tests {
         let long = "A".repeat(115);
         let tooltip = format!("CodexBar\n{long}\nB line that is dropped entirely here");
 
-        let fitted = fit_tooltip(&tooltip, WIDE_BUDGET);
+        let fitted = fit_tooltip(&tooltip, TRAY_TOOLTIP_MAX_UTF16);
 
-        assert!(utf16_len(&fitted) <= WIDE_BUDGET, "{fitted}");
+        assert!(utf16_len(&fitted) <= TRAY_TOOLTIP_MAX_UTF16, "{fitted}");
         assert_eq!(fitted, format!("CodexBar\n{long}…"));
     }
 
@@ -1111,10 +1108,10 @@ mod tests {
         ]
         .join("\n");
 
-        let fitted = fit_tooltip(&tooltip, WIDE_BUDGET);
+        let fitted = fit_tooltip(&tooltip, TRAY_TOOLTIP_MAX_UTF16);
 
         assert_eq!(fitted, "CodexBar\nOpenAI: Major outage\nClaude: 87% left…");
-        assert!(utf16_len(&fitted) <= WIDE_BUDGET);
+        assert!(utf16_len(&fitted) <= TRAY_TOOLTIP_MAX_UTF16);
     }
 
     #[test]
@@ -1132,23 +1129,22 @@ mod tests {
         // Each emoji is two UTF-16 units; a char-count cut would overflow or split a pair.
         let tooltip = format!("{}\nCodexBar", "🙂".repeat(100));
 
-        let fitted = fit_tooltip(&tooltip, WIDE_BUDGET);
+        let fitted = fit_tooltip(&tooltip, TRAY_TOOLTIP_MAX_UTF16);
 
-        assert!(utf16_len(&fitted) <= WIDE_BUDGET, "{fitted}");
+        assert!(utf16_len(&fitted) <= TRAY_TOOLTIP_MAX_UTF16, "{fitted}");
         assert_eq!(fitted.chars().filter(|ch| *ch == '🙂').count(), 63);
         assert!(fitted.ends_with('…'), "{fitted}");
         assert!(!fitted.contains('\n'), "{fitted}");
     }
 
     #[test]
-    fn fit_tooltip_keeps_whole_provider_lines_within_the_legacy_tip_limit() {
+    fn fit_tooltip_keeps_two_typical_provider_lines_whole() {
         let tooltip =
             "CodexBar\nClaude: 58% left • Resets in 2h 59m\nCodex: 82% left • Resets in 4d 3h";
 
         let fitted = fit_tooltip(tooltip, TRAY_TOOLTIP_MAX_UTF16);
 
-        assert!(utf16_len(&fitted) <= 63, "{fitted}");
-        assert_eq!(fitted, "CodexBar\nClaude: 58% left • Resets in 2h 59m…");
+        assert_eq!(fitted, tooltip);
     }
 
     #[test]