sweep remaining analyze infos to zero

Clears the 19 misc lint hits left after the test_app print sweep
+ libc.dart suppression. By rule:

- `withOpacity(α)` → `withValues(alpha: α)` (deprecated_member_use)
  in `painter.dart:187` and `terminal_view.dart:318`.
- `Pointer.elementAt(n)` → `Pointer + n` (deprecated_member_use)
  in `native_pty.dart:306` and `session.dart:187`.
- Brace single-statement for/if bodies in `native_pty.dart`
  (×3) and `decisions_view.dart` (curly_braces_in_flow_control_
  structures).
- `IsolateClient` and `InProcessClient` constructors switched to
  `super.log` / `super.events` parameters (use_super_parameters);
  associated unused imports of `kernel/src/log.dart` and
  `kernel/src/events/bus.dart` removed in the same files.
- `InProcessClient._dispatcher` field + getter/setter pair folded
  into a single mutable public `dispatcher` field
  (unnecessary_getters_setters).
- `_buildDispatcher` local in `lib/main.dart` renamed to
  `buildDispatcher` (no_leading_underscores_for_local_identifiers).
- `_onTapDown(_)` in `terminal_view.dart` typed as
  `TapDownDetails _` (strict_top_level_inference).
- `operator []=(...)` in `circular_buffer.dart` given an explicit
  `void` return type (strict_top_level_inference).
- `CustomKeyboardListener` and `TerminalGestureDetector` callsites
  reordered so `child:` lands last (sort_child_properties_last).
- `CustomTextEdit` constructor declared `const`
  (prefer_const_constructors_in_immutables).
- `LinkedHashMap<K, V>()` in `paragraph_cache.dart` collapsed to a
  `<K, V>{}` literal (prefer_collection_literals); the now-unused
  `dart:collection` import dropped.

Project analyze: 19 → 0 issues. `make test` stays green; coverage
unchanged at 52.72%.

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

lib/builtin/claude/src/claude_pane.dart

@@ -214,9 +214,7 @@ class _ClaudePaneState extends State<ClaudePane> {
           final b64 = e.data['bytes_b64'];
           if (b64 is String) {
             _outputBuf.write(utf8.decode(base64Decode(b64), allowMalformed: true));
-            if (_flushTimer == null) {
-              _flushTimer = Timer(Duration.zero, _flushOutput);
-            }
+            _flushTimer ??= Timer(Duration.zero, _flushOutput);
           }
         case 'pane.exit':
           setState(() => _statusLine = widget.isPrimary ? 'session exited — restart clide to retry' : 'session exited');

lib/builtin/decisions/src/decisions_view.dart

@@ -123,8 +123,9 @@ class _DecisionsViewState extends State<DecisionsView> {
     final tokens = ClideTheme.of(context).surface;
     if (_loading) return const Center(child: ClideText('Loading decisions...', muted: true));
     if (_error != null) return Padding(padding: const EdgeInsets.all(12), child: ClideText(_error!, muted: true));
-    if (_decisions.isEmpty)
+    if (_decisions.isEmpty) {
       return const Padding(padding: EdgeInsets.all(12), child: ClideText('No decisions found.\nRun `pql decisions sync` to index.', muted: true));
+    }
 
     final lf = _filter.toLowerCase();
     final hasFilter = lf.isNotEmpty;