feat(backend): Implement storage functions for context presets

src/project_manager.py

@@ -101,6 +101,7 @@ def default_project(name: str = "unnamed") -> dict[str, Any]:
   "output":      {"output_dir": "./md_gen"},
   "files":       {"base_dir": ".", "paths": [], "tier_assignments": {}},
   "screenshots": {"base_dir": ".", "paths": []},
+  "context_presets": {},
   "gemini_cli":  {"binary_path": "gemini"},
   "deepseek":    {"reasoning_effort": "medium"},
   "agent":       {
@@ -248,6 +249,27 @@ def flat_config(proj: dict[str, Any], disc_name: Optional[str] = None, track_id:
    "history": history,
   },
  }
+ # ── context presets ──────────────────────────────────────────────────────────
+
+def save_context_preset(project_dict: dict, preset_name: str, files: list[str], screenshots: list[str]) -> None:
+ """Save a named context preset (files + screenshots) into the project dict."""
+ if "context_presets" not in project_dict:
+  project_dict["context_presets"] = {}
+ project_dict["context_presets"][preset_name] = {
+  "files": files,
+  "screenshots": screenshots
+ }
+
+def load_context_preset(project_dict: dict, preset_name: str) -> dict:
+ """Return the files and screenshots for a named preset."""
+ if "context_presets" not in project_dict or preset_name not in project_dict["context_presets"]:
+  raise KeyError(f"Preset '{preset_name}' not found in project context_presets.")
+ return project_dict["context_presets"][preset_name]
+
+def delete_context_preset(project_dict: dict, preset_name: str) -> None:
+ """Remove a named preset if it exists."""
+ if "context_presets" in project_dict:
+  project_dict["context_presets"].pop(preset_name, None)
  # ── track state persistence ─────────────────────────────────────────────────
 
 def save_track_state(track_id: str, state: 'TrackState', base_dir: Union[str, Path] = ".") -> None: