revert(ci): remove cache steps until runner cache server works (#107)

.gitea/workflows/agent.yml

@@ -5,10 +5,6 @@ name: agent
 on:
   workflow_call:
 
-# Pinned opencode version — used both to install it and to key the CI cache below.
-env:
-  OPENCODE_VERSION: "1.17.13"
-
 jobs:
 
   agent:
@@ -125,24 +121,6 @@ jobs:
           curl -sS -X POST -H "Authorization: token $SELF_TOKEN" -H "Content-Type: application/json" \
             "$R" -d '{"content":"eyes"}' -w '\nreact -> HTTP %{http_code}\n' || true
 
-      - name: Cache opencode CLI
-        if: steps.prep.outputs.mode != 'skip'
-        continue-on-error: true   # a cache backend hiccup must never fail an agent run
-        uses: actions/cache@v4
-        with:
-          path: ~/.opencode
-          key: opencode-${{ runner.os }}-${{ env.OPENCODE_VERSION }}
-
-      - name: Cache Playwright browsers + npm (browser agents only)
-        if: steps.prep.outputs.mode != 'skip' && (steps.prep.outputs.name == 'senior' || steps.prep.outputs.name == 'lead' || steps.prep.outputs.name == 'qa')
-        continue-on-error: true
-        uses: actions/cache@v4
-        with:
-          path: |
-            ~/.cache/ms-playwright
-            ~/.npm
-          key: playwright-npm-${{ runner.os }}-v1
-
       - name: Install opencode + provider config (+ Playwright MCP for browser agents)
         if: steps.prep.outputs.mode != 'skip'
         env: