feat: accept .tex resume upload + compile with Tectonic to PDF

Streamlit file_uploader now accepts [pdf, tex]. When a .tex file is
uploaded, Tectonic compiles it to PDF in a temp dir and the result is
saved to data/resume/resume.pdf. On failure, stderr is shown inline and
st.stop() halts. Success banner shows the original filename.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

HISTORY.md

@@ -4,6 +4,17 @@ A running log of everything built, fixed, and changed. Most recent first.
 
 ---
 
+## 2026-06-23 (PM7) — LaTeX resume upload support
+
+Resume upload page now accepts `.tex` files in addition to PDF. When a `.tex` file is
+uploaded, Tectonic (pre-installed in the Docker image) compiles it to PDF in a temp
+directory and the result is saved as `data/resume/resume.pdf` — same downstream path
+as a direct PDF upload. On compilation failure, a Streamlit error shows the Tectonic
+stderr (last 600 chars) and halts further processing. The success banner shows the
+original uploaded filename so the user can confirm which file was used.
+
+---
+
 ## 2026-06-23 (PM6) — Fix WebSocket proxy: subprotocol negotiation for Streamlit 1.45+
 
 Streamlit 1.45+ requires the `streamlit` WebSocket subprotocol to be negotiated

ui.py

@@ -1172,10 +1172,10 @@ if show_config:
 </div>""")
 
             resume_file = st.file_uploader(
-                "Drop your resume PDF here",
-                type=["pdf"], key="resume_upload",
+                "Drop your resume PDF or LaTeX file here",
+                type=["pdf", "tex"], key="resume_upload",
                 label_visibility="collapsed",
-                help="Supported format: PDF. Max size: 10MB.",
+                help="Supported formats: PDF or LaTeX (.tex). Max size: 10MB.",
             )
             # Save on EVERY new/changed upload (detected by name+size) so a
             # re-upload actually REPLACES the old resume. The previous guard
@@ -1185,8 +1185,28 @@ if show_config:
                 _sig = f"{resume_file.name}:{getattr(resume_file, 'size', 0)}"
                 if st.session_state.get("_uploaded_sig") != _sig:
                     os.makedirs("data/resume", exist_ok=True)
-                    with open("data/resume/resume.pdf", "wb") as f:
-                        f.write(resume_file.getvalue())
+                    if resume_file.name.lower().endswith(".tex"):
+                        import tempfile as _tmpfile, subprocess as _sp, shutil as _sh
+                        with _tmpfile.TemporaryDirectory() as _td:
+                            _tex = os.path.join(_td, "resume.tex")
+                            with open(_tex, "wb") as _f:
+                                _f.write(resume_file.getvalue())
+                            _r = _sp.run(
+                                ["tectonic", "--outdir", _td, _tex],
+                                capture_output=True, text=True, timeout=60,
+                            )
+                            _pdf = os.path.join(_td, "resume.pdf")
+                            if _r.returncode == 0 and os.path.exists(_pdf):
+                                _sh.copy(_pdf, "data/resume/resume.pdf")
+                            else:
+                                st.error(
+                                    "LaTeX compilation failed. Check your .tex file.\n\n"
+                                    + (_r.stderr[-600:] or _r.stdout[-600:])
+                                )
+                                st.stop()
+                    else:
+                        with open("data/resume/resume.pdf", "wb") as f:
+                            f.write(resume_file.getvalue())
                     st.session_state["_uploaded_sig"] = _sig
                     # Invalidate the parsed-profile cache so it re-parses the
                     # NEW file (cache is keyed by mtime+size, but delete to be safe)
@@ -1200,9 +1220,10 @@ if show_config:
 
             if has_resume:
                 fsize = os.path.getsize("data/resume/resume.pdf") // 1024
+                _uploaded_name = st.session_state.get("_uploaded_sig", "resume").split(":")[0] or "resume.pdf"
                 st.html(f"""
 <div class="micro-success">
-  ✅ <strong>resume.pdf</strong> uploaded ({fsize} KB) — Ready for AI matching
+  ✅ <strong>{_uploaded_name}</strong> → resume.pdf ({fsize} KB) — Ready for AI matching
 </div>""")
                 # ── Show the profile we built from THIS resume ──
                 _render_uploaded_profile()