fix(latex): brace bracket-leading bullets, document escapes, pin pdftotext encoding

Three findings from the 2026-08-19 review (F9, F31, F34):

- F9: every placeholder bullet written as \item [text] let LaTeX parse
  the bracketed text as the item's optional label, rendering it clipped
  off the left page edge and absent from the PDF text layer ("Achievement"
  appeared 9 times in cv/main_example.tex and 0 times in the extraction,
  with a clean compile and green CI). Bullets are now braced as
  \item {[text]} in the example CV and in the template
  06-cover-letter-templates.md teaches, and CI's stock PDF assertions
  additionally require "Achievement" to survive pdftotext.

- F31: 05-cv-templates.md gains a "LaTeX Special Characters" section and
  06's is completed beyond \_ and \&. The load-bearing case is an
  unescaped % in a quantified achievement bullet: it starts a LaTeX
  comment and silently deletes the rest of the line from the PDF.

- F34: the documented ATS extraction commands (apply.md,
  05-cv-templates.md, CLAUDE.md) now carry -enc UTF-8. Xpdf-based
  pdftotext builds default to Latin-1 output, so a correct non-ASCII CV
  failed the replacement-character parseability check.

framework_version: 05-cv-templates.md 1.4.1 -> 1.4.2,
06-cover-letter-templates.md 1.0.1 -> 1.0.2. All three pinned by the new
tests/test_latex_guidance.py (9 tests; suite now 261).

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

.claude/skills/job-application-assistant/06-cover-letter-templates.md

@@ -1,5 +1,5 @@
 ---
-framework_version: 1.0.1
+framework_version: 1.0.2
 ---
 
 # Cover Letter Templates and Tailoring Guide
@@ -92,9 +92,9 @@ The font wrapper is mandatory — if you just move `\begin{itemize}` outside `\l
 
 {\raggedright\fontspec[Path = OpenFonts/fonts/raleway/]{Raleway-Medium}\fontsize{11pt}{13pt}\selectfont
 \begin{itemize}
-    \item [Concrete achievement/skill 1]
-    \item [Concrete achievement/skill 2]
-    \item [Concrete achievement/skill 3]
+    \item {[Concrete achievement/skill 1]}
+    \item {[Concrete achievement/skill 2]}
+    \item {[Concrete achievement/skill 3]}
 \end{itemize}\par}
 
 \lettercontent{[Connection to company - why this role, why this company specifically]}
@@ -146,10 +146,14 @@ The font wrapper is mandatory — if you just move `\begin{itemize}` outside `\l
 - 3-5 bullets is ideal
 - Start each bullet with bold label or action verb
 - Use `\textbf{Label:}` for category-style bullets
+- A bullet whose text begins with a literal `[` must be braced: `\item {[text]}`. Unbraced, LaTeX parses `[text]` as `\item`'s optional label and renders it off the left page edge, missing from the PDF text layer entirely
 
 ### LaTeX Special Characters
-- Underscore: `\_`
-- Ampersand: `\&`
+Escape these wherever they appear in body text:
+- Ampersand: `\&` (company names: Brüel \& Kjær, H\&M) - unescaped, the compile fails loudly
+- Percent: `\%` ("grew revenue 30\%") - unescaped, it does **not** fail: everything after the `%` on that line is silently eaten as a LaTeX comment
+- Dollar: `\$`, hash: `\#`, underscore: `\_`
+- Tilde: `\textasciitilde{}`, caret: `\textasciicircum{}`, backslash: `\textbackslash{}`
 
 ### Non-English Cover Letters
 - Same template structure, just write content in the posting's language