make sidebar filter boxes CLI-addressable via the MessageBus (T-270)

The sidebar/dock filter fields (the shared ClideFilterBox) had no CLI
peer — a one-way, UI-only affordance that broke D-6 parity. Add the
drive+observe verb `clide ui filter <address> [<text>]`, routed entirely
through the kernel MessageBus pub/sub so a box reacts to a published
message identically whether the trigger was a UI keystroke or the CLI —
keeping extensions first-class (no dispatcher→widget wiring).

- ClideFilterBox gains an `address`; when set it listens on `filter.set`
  for its address and republishes its value on `filter.state`. Null
  address keeps the box a kernel-free UI widget.
- FilterStateCache (new kernel service) caches the latest `filter.state`
  per address — the bus has no retention, so this backs the observe-half.
- ui.filter: with text → publishes `filter.set` (drive); without →
  reads the cache (observe). Honest toolError when there is no live UI.
- Address every box: decisions/tickets/files/git/output/problems panes,
  the four search boxes, and the pql search/query/markdown inputs.

Addresses are the ids from `clide pane list` (e.g. decisions.panel).
settings.json: allow the `clide` CLI + relevant skills.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

lib/builtin/decisions/src/decisions_view.dart

@@ -150,7 +150,7 @@ class _DecisionsViewState extends State<DecisionsView> {
       children: [
         Row(
           children: [
-            Expanded(child: ClideFilterBox(hint: 'Filter decisions…', onChanged: (v) => setState(() => _filter = v))),
+            Expanded(child: ClideFilterBox(address: 'decisions.panel', hint: 'Filter decisions…', onChanged: (v) => setState(() => _filter = v))),
             Padding(
               padding: const EdgeInsets.only(right: 8),
               child: ClideTappable(

lib/builtin/files/src/file_tree_view.dart

@@ -65,7 +65,7 @@ class _FileTreeViewState extends State<FileTreeView> {
         final rootName = root.split(Platform.pathSeparator).last;
         return Column(
           children: [
-            ClideFilterBox(hint: 'Filter files…', onChanged: (v) => setState(() => _filter = v)),
+            ClideFilterBox(address: 'files.tree', hint: 'Filter files…', onChanged: (v) => setState(() => _filter = v)),
             Expanded(
               child: Semantics(
                 label: 'file tree — $rootName',

lib/builtin/git/src/git_panel_view.dart

@@ -75,7 +75,7 @@ class _GitPanelViewState extends State<GitPanelView> {
           explicitChildNodes: true,
           child: Column(
             children: [
-              ClideFilterBox(hint: 'Filter changes…', onChanged: (v) => setState(() => _filter = v)),
+              ClideFilterBox(address: 'git.panel', hint: 'Filter changes…', onChanged: (v) => setState(() => _filter = v)),
               Expanded(
                   child: SingleChildScrollView(
                 padding: const EdgeInsets.symmetric(vertical: 4),

lib/builtin/output/src/output_view.dart

@@ -125,7 +125,7 @@ class _OutputViewState extends State<OutputView> {
       child: Row(
         children: [
           Expanded(
-            child: ClideFilterBox(hint: 'Filter…', onChanged: _c.setText),
+            child: ClideFilterBox(address: 'output.panel', hint: 'Filter…', onChanged: _c.setText),
           ),
           const SizedBox(width: 8),
           _Chip(

lib/builtin/pql/src/pql_search_body.dart

@@ -103,11 +103,16 @@ class _PqlSearchBodyState extends State<PqlSearchBody> {
           children: [
             if (widget.mode == PqlPaneMode.markdown)
               ClideFilterBox(
+                address: 'search.pql.markdown',
                 hint: 'Filter markdown…',
                 onChanged: (v) => unawaited(c.loadMarkdownFiles(glob: v.isEmpty ? null : '**/*$v*.md')),
               )
             else
-              _PqlSearchInput(controller: c, dsl: widget.mode == PqlPaneMode.query),
+              _PqlSearchInput(
+                controller: c,
+                dsl: widget.mode == PqlPaneMode.query,
+                address: widget.mode == PqlPaneMode.query ? 'search.pql.query' : 'search.pql.vault',
+              ),
             if (c.error != null)
               Padding(
                 padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 4),
@@ -146,13 +151,15 @@ class _PqlSearchBodyState extends State<PqlSearchBody> {
 }
 
 class _PqlSearchInput extends StatelessWidget {
-  const _PqlSearchInput({required this.controller, required this.dsl});
+  const _PqlSearchInput({required this.controller, required this.dsl, this.address});
   final PqlController controller;
   final bool dsl;
+  final String? address;
 
   @override
   Widget build(BuildContext context) {
     return ClideFilterBox(
+      address: address,
       hint: dsl ? 'PQL query…' : 'Search vault…',
       debounce: dsl ? Duration.zero : const Duration(milliseconds: 300),
       onChanged: dsl ? (_) {} : (v) => unawaited(controller.search(v)),

lib/builtin/problems/src/problems_view.dart

@@ -54,7 +54,7 @@ class _ProblemsViewState extends State<ProblemsView> {
             return Column(
               crossAxisAlignment: CrossAxisAlignment.stretch,
               children: [
-                ClideFilterBox(hint: 'Filter problems…', onChanged: (v) => setState(() => _filter = v)),
+                ClideFilterBox(address: 'problems.panel', hint: 'Filter problems…', onChanged: (v) => setState(() => _filter = v)),
                 Padding(
                   padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 2),
                   child: Row(

lib/builtin/search/src/search_panel_view.dart

@@ -105,7 +105,7 @@ class _SearchPanelViewState extends State<SearchPanelView> {
               child: Column(
                 crossAxisAlignment: CrossAxisAlignment.stretch,
                 children: [
-                  ClideFilterBox(hint: 'Search', onChanged: c.run, onSubmitted: c.run),
+                  ClideFilterBox(address: 'search.findInFiles', hint: 'Search', onChanged: c.run, onSubmitted: c.run),
                   const SizedBox(height: 6),
                   Row(
                     children: [
@@ -137,7 +137,9 @@ class _SearchPanelViewState extends State<SearchPanelView> {
                   const SizedBox(height: 6),
                   Row(
                     children: [
-                      Expanded(child: ClideFilterBox(hint: 'Replace', icon: null, debounce: Duration.zero, onChanged: c.setReplacement)),
+                      Expanded(
+                          child: ClideFilterBox(
+                              address: 'search.findInFiles.replace', hint: 'Replace', icon: null, debounce: Duration.zero, onChanged: c.setReplacement)),
                       const SizedBox(width: 6),
                       _ReplaceAllButton(
                         enabled: c.replacement.isNotEmpty && c.matchCount > 0,
@@ -147,9 +149,15 @@ class _SearchPanelViewState extends State<SearchPanelView> {
                     ],
                   ),
                   const SizedBox(height: 6),
-                  ClideFilterBox(hint: 'files to include (e.g. *.dart)', icon: null, debounce: Duration.zero, onChanged: (v) => c.include = v),
+                  ClideFilterBox(
+                      address: 'search.findInFiles.include',
+                      hint: 'files to include (e.g. *.dart)',
+                      icon: null,
+                      debounce: Duration.zero,
+                      onChanged: (v) => c.include = v),
                   const SizedBox(height: 4),
-                  ClideFilterBox(hint: 'files to exclude', icon: null, debounce: Duration.zero, onChanged: (v) => c.exclude = v),
+                  ClideFilterBox(
+                      address: 'search.findInFiles.exclude', hint: 'files to exclude', icon: null, debounce: Duration.zero, onChanged: (v) => c.exclude = v),
                 ],
               ),
             ),

lib/builtin/tickets/src/tickets_view.dart

@@ -159,7 +159,7 @@ class _TicketsViewState extends State<TicketsView> {
       children: [
         Row(
           children: [
-            Expanded(child: ClideFilterBox(hint: 'Filter tickets…', onChanged: (v) => setState(() => _filter = v))),
+            Expanded(child: ClideFilterBox(address: 'tickets.panel', hint: 'Filter tickets…', onChanged: (v) => setState(() => _filter = v))),
             Padding(
               padding: const EdgeInsets.only(right: 8),
               child: ClideTappable(