docs: fix round-3 review findings — §/used-to/v1 residuals, zh stamp example, budget freeze honored

Delete the three §-citation residuals (web-app cordis.patch.yml, two
client design.md §-headers); recast the two CSS used-to narrations and
hmr's four v1 labels as current-state prose; narrow the zh exemption
example to 'this cut' (「本版本」 legitimately renders 'This version');
extend the candidate gate list with the post-battery shapes (§\d with a
committed-owner carve-out, 'used to', bare v1) on both sides and
re-record; honor the over-target ceiling freeze — docs/AGENTS.md
condensed to 1320 and the ceiling restored to 1320.

packages/bundle/web-app/cordis.patch.yml

@@ -105,8 +105,8 @@
 
     # Dual-face: node half scans this very tree for dshClient rows, composes
     # window.__DSH_BOOT__, serves /plugins/<id>/client.js; browser half is the
-    # module table the shell kernel constructs before cordis exists (§4.7 —
-    # adopted as a plugin entry by the kernel, never fetched).
+    # module table the shell kernel constructs before cordis exists (adopted
+    # as a plugin entry by the kernel, never fetched).
     - id: modules
       name: '@deepseek-ai/dsh-client-modules'