Add local files section to case view (research, drafts, proofread)

- New API endpoint /api/cases/{num}/local-files lists files from disk
- New API endpoint /api/cases/{num}/local-files/{folder}/{file} serves file content
- Case view now shows research/analysis files, proofread texts, and draft decisions
- Files are clickable and open in new tab

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

web/app.py

@@ -565,6 +565,62 @@ async def api_learn(case_number: str):
     return {"status": "final", "message": "לולאת למידה הופעלה — גרסה סופית נקלטה"}
 
 
+# ── Local files API — research, drafts, proofread ──
+
+
+@app.get("/api/cases/{case_number}/local-files")
+async def api_local_files(case_number: str):
+    """List local files from case subdirectories (research, drafts, proofread)."""
+    case_dir = config.find_case_dir(case_number)
+    result = {}
+    for folder in ("research", "proofread"):
+        folder_path = case_dir / "documents" / folder
+        if folder_path.exists():
+            files = []
+            for f in sorted(folder_path.iterdir()):
+                if f.is_file() and not f.name.startswith("."):
+                    stat = f.stat()
+                    files.append({
+                        "filename": f.name,
+                        "size": stat.st_size,
+                        "modified_at": stat.st_mtime,
+                        "folder": folder,
+                    })
+            if files:
+                result[folder] = files
+    # Drafts are at case level, not under documents
+    drafts_path = case_dir / "drafts"
+    if drafts_path.exists():
+        files = []
+        for f in sorted(drafts_path.iterdir()):
+            if f.is_file() and not f.name.startswith("."):
+                stat = f.stat()
+                files.append({
+                    "filename": f.name,
+                    "size": stat.st_size,
+                    "modified_at": stat.st_mtime,
+                    "folder": "drafts",
+                })
+        if files:
+            result["drafts"] = files
+    return result
+
+
+@app.get("/api/cases/{case_number}/local-files/{folder}/{filename}")
+async def api_read_local_file(case_number: str, folder: str, filename: str):
+    """Read contents of a local case file."""
+    if folder not in ("research", "proofread", "drafts"):
+        raise HTTPException(400, "Invalid folder")
+    case_dir = config.find_case_dir(case_number)
+    if folder == "drafts":
+        path = case_dir / "drafts" / filename
+    else:
+        path = case_dir / "documents" / folder / filename
+    if not path.exists() or not path.is_file():
+        raise HTTPException(404, "קובץ לא נמצא")
+    return FileResponse(path, media_type="text/plain; charset=utf-8", filename=filename)
+
+
 # ── Exports API — drafts, versions, download, upload, mark-final ──