fix(cancel): always call abort_session

lua/opencode/services/session_runtime.lua

@@ -241,8 +241,10 @@ end
 
 ---@param opts? SendMessageOpts
 M.cancel = Promise.async(function()
-  if state.active_session and state.jobs.is_running() then
-    vim.g.opencode_abort_count = (vim.g.opencode_abort_count or 0) + 1
+  if state.active_session then
+    if state.jobs.is_running() then
+      vim.g.opencode_abort_count = (vim.g.opencode_abort_count or 0) + 1
+    end
 
     local permissions = state.pending_permissions or {}
     if #permissions > 0 and state.api_client then

tests/unit/services_session_runtime_spec.lua

@@ -689,6 +689,38 @@ describe('opencode.services.session_runtime', function()
 
       abort_stub:revert()
     end)
+
+    it('aborts when the model is processing on the server but no client request is in flight', function()
+      state.session.set_active({ id = 'sess1' })
+      store.set('job_count', 0)
+
+      local abort_stub = stub(state.api_client, 'abort_session').invokes(function()
+        return Promise.new():resolve(true)
+      end)
+
+      session_runtime.cancel():wait()
+
+      assert.stub(abort_stub).was_called()
+
+      abort_stub:revert()
+    end)
+
+    it('does not count cancel toward the server-restart threshold when no client request is in flight', function()
+      state.session.set_active({ id = 'sess1' })
+      store.set('job_count', 0)
+      vim.g.opencode_abort_count = 0
+
+      for _ = 1, 5 do
+        session_runtime.cancel():wait()
+      end
+
+      assert.is_equal(0, vim.g.opencode_abort_count)
+
+      store.set('job_count', 1)
+      vim.g.opencode_abort_count = 0
+      session_runtime.cancel():wait()
+      assert.is_equal(1, vim.g.opencode_abort_count)
+    end)
   end)
 
   describe('opencode_ok (version checks)', function()