fix(ci): catalog sync, markdownlint, unicode safety, unsupported frontmatter key

catalog:sync: update skill count 261→265 in README.md, AGENTS.md,
docs/zh-CN/AGENTS.md, .claude-plugin/plugin.json

markdownlint:
- MD009: strip trailing spaces in 10_purpose-why, 20_positioning,
  40_personality-archetype, 50_voice-tone, 60_narrative-story, 90_SYNTHESIS
  (both skills/ and .agents/skills/ copies)
- MD037: wrap ___ placeholders in backticks in 70_founder-tension.md:39
- MD028: replace blank lines inside blockquotes with bare > in 90_SYNTHESIS.md

unicode-safety: replace U+2194 (↔) with ASCII <-> in 50_voice-tone.md and
competitive-report-structure/SKILL.md (both copies)

codex-validator: remove unsupported `origin: community` key from
brand-discovery, competitive-platform-analysis, competitive-report-structure,
benchmark-methodology SKILL.md files (both copies)

package-lock.json

@@ -421,6 +421,7 @@
       "integrity": "sha512-NZyJarBfL7nWwIq+FDL6Zp/yHEhePMNnnJ0y3qfieCrmNvYct8uvtiV41UvlSe6apAfk0fY1FbWx+NwfmpvtTg==",
       "dev": true,
       "license": "MIT",
+      "peer": true,
       "bin": {
         "acorn": "bin/acorn"
       },
@@ -852,6 +853,7 @@
       "integrity": "sha512-LEyamqS7W5HB3ujJyvi0HQK/dtVINZvd5mAAp9eT5S/ujByGjiZLCzPcHVzuXbpJDJF/cxwHlfceVUDZ2lnSTw==",
       "dev": true,
       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "@eslint-community/eslint-utils": "^4.8.0",
         "@eslint-community/regexpp": "^4.12.1",
@@ -2433,6 +2435,7 @@
       "integrity": "sha512-QP88BAKvMam/3NxH6vj2o21R6MjxZUAd6nlwAS/pnGvN9IVLocLHxGYIzFhg6fUQ+5th6P4dv4eW9jX3DSIj7A==",
       "dev": true,
       "license": "MIT",
+      "peer": true,
       "engines": {
         "node": ">=12"
       },