Goals: count the harness's own tokens against the goal budget (#377)

ddiff --git a/server/domain/run-tasks.js b/server/domain/run-tasks.js
iindex 4aed88d..533d23b 100644
---- a/server/domain/run-tasks.js
++++ b/server/domain/run-tasks.js
@@@ -144,7 +144,8 @@ function usageOf(result) {
      })();
      return {
          cost_usd: typeof d.cost_usd === 'number' && Number.isFinite(d.cost_usd) ? d.cost_usd : null,
--        tokens: tokens || null,
++        // The harness's own token count when its log has no usage lines (the CLI agents report it on the result).
++        tokens: tokens || (Number.isFinite(Number(d.tokens)) ? Number(d.tokens) : null),
          steps: steps || null,
          turns: turns || null,
          session: session || null,
ddiff --git a/test/task-goals.test.js b/test/task-goals.test.js
iindex 69f56a2..df740bf 100644
---- a/test/task-goals.test.js
++++ b/test/task-goals.test.js
@@@ -71,6 +71,7 @@ const { boot, check, done } = require('./helpers/boot');
          const row = await rowOf(id);
          const result = {
              ok: state === 'succeeded', summary: 'I wrote notes.txt.', files: [{ path: 'notes.txt', added: 1, removed: 0 }],
++            tokens: 2000,
              turns, log: [{ t: 'agent', agent: row.agent, session }, { t: 'done', ok: state === 'succeeded', text: 'I wrote notes.txt.' }],
              ...(go ? { goal: go } : {}),
          };
@@@ -145,6 +146,15 @@ const { boot, check, done } = require('./helpers/boot');
              assert.strictEqual(shown.json.outcome.state, 'stopped_by_budget');
          });
  
++        await check('a spent token budget also ends the task stopped by budget', async () => {
++            next = [{ status: 'rejected', reason: 'still empty', check_output: rejectedCheck.check_output }];
++            const id = await startTask({ ...GOAL, budget: { tokens: 100 } });
++            const { row, attempts } = await endAttempt(id, { go: rejectedCheck });
++            assert.strictEqual(attempts.length, 1);
++            assert.strictEqual(row.end_state, 'stopped_by_budget');
++            assert.match(row.outcome_note, /stopped by budget: the task spent 2000 of its 100 tokens/);
++        });
++
          await check('a verifier that could not run leaves the task waiting, never ready', async () => {
              next = [{ status: 'failed', reason: 'the model was unavailable', check_output: acceptedCheck.check_output }];
              const id = await startTask();