fix(pdf): ignore phantom gengar skill text nodes (#3289)

* docs(agents): align Redis compose commands with development guide

- Problem: AGENTS.md omitted Redis from dev infrastructure compose commands
  while docs/contributing/development.mdx starts redis for local dev.
- Fix: document full postgres/redis/seaweedfs compose command and note that
  REDIS_URL and ENCRYPTION_SECRET are required for AI agent features.
- Verification: preflight upstream fetch; manual diff against development.mdx
  and compose.dev.yml redis service; duplicate PR gate passed.

* fix(pdf): ignore phantom gengar skill text nodes

- Problem: gengar template resumes with skills keywords fail semantic CSS activation because the legacy renderer emits a harmless empty text node that parity treats as a mismatch.

- Fix: treat the specific empty text artifact as presentation-neutral in the legacy parity comparator and add a regression test for the phantom fontSize 9 node.

- Verification: pnpm test src/semantic/legacy-parity.test.ts in packages/pdf passed (31 tests).

* docs: clarify host and container Redis URLs

- Problem: the development guide only showed the Docker Redis hostname, which fails for host-run development.\n- Fix: document localhost for host execution and redis for Docker execution.\n- Verification: pnpm test src/semantic/legacy-parity.test.ts (31 passed).

* fix(pdf): omit empty skill proficiency text

* test(pdf): cover blank skill proficiency

---------

Co-authored-by: Amruth Pillai <im.amruth@gmail.com>

packages/pdf/src/templates/shared/sections.tsx

@@ -1153,7 +1153,7 @@ const SkillsSection = ({ sectionId = "skills", sectionData }: ItemSectionProps<S
 						</SectionItemHeader>
 
 						<View>
-							<Text semanticField="proficiency">{item.proficiency}</Text>
+							{hasSplitRowText(item.proficiency) && <Text semanticField="proficiency">{item.proficiency}</Text>}
 							<Small semanticField="keywords">{item.keywords.join(", ")}</Small>
 						</View>