fix(conductor): Resolve FileExistsError and harden Preset Manager modal

conductor/tracks/saved_presets_20260308/plan.md

@@ -41,6 +41,9 @@
 
 ## Phase 4: Final Integration & Polish
 - [x] Task: Ensure robust error handling for missing or malformed `.toml` files.
+- [x] Task: Bugfix: Correct `PresetManager` initialization to use project parent directory.
+- [x] Task: Hardening: Wrap modal rendering in `try...finally` to prevent ImGui state corruption.
+- [x] Task: Hardening: Ensure `PresetManager._save_file` validates that parent is a directory.
 - [x] Task: Final UI polish (spacing, icons, tooltips).
 - [x] Task: Run full suite of relevant tests.
 - [x] Task: Conductor - User Manual Verification 'Phase 4: Final Integration & Polish' (Protocol in workflow.md)

config.toml

@@ -2,9 +2,10 @@
 provider = "minimax"
 model = "MiniMax-M2.5"
 temperature = 0.0
-max_tokens = 24000
+max_tokens = 4096
 history_trunc_limit = 900000
-system_prompt = ""
+active_preset = "Default"
+system_prompt = "Not sure yet."
 
 [projects]
 paths = [
@@ -40,7 +41,7 @@ Response = false
 "Tool Calls" = false
 Theme = true
 "Log Management" = true
-Diagnostics = true
+Diagnostics = false
 
 [theme]
 palette = "Nord Dark"

manualslop_layout.ini

@@ -114,14 +114,14 @@ Collapsed=0
 DockId=0x00000012,0
 
 [Window][Files & Media]
-Pos=0,1849
-Size=762,288
+Pos=0,2013
+Size=762,124
 Collapsed=0
 DockId=0x00000002,0
 
 [Window][AI Settings]
 Pos=0,975
-Size=762,872
+Size=762,1036
 Collapsed=0
 DockId=0x00000001,0
 
@@ -321,6 +321,11 @@ Pos=755,679
 Size=420,966
 Collapsed=0
 
+[Window][Preset Manager]
+Pos=786,858
+Size=780,650
+Collapsed=0
+
 [Table][0xFB6E3870,4]
 RefScale=13
 Column 0  Width=80
@@ -415,8 +420,8 @@ DockSpace           ID=0xAFC85805 Window=0x079D3A04 Pos=0,30 Size=3840,2107 Spli
       DockNode      ID=0x00000007 Parent=0x0000000B SizeRef=762,858 Split=Y Selected=0x8CA2375C
         DockNode    ID=0x00000005 Parent=0x00000007 SizeRef=295,943 Selected=0xF4139CA2
         DockNode    ID=0x00000006 Parent=0x00000007 SizeRef=295,1168 Split=Y Selected=0x7BD57D6A
-          DockNode  ID=0x00000001 Parent=0x00000006 SizeRef=824,872 CentralNode=1 Selected=0x7BD57D6A
-          DockNode  ID=0x00000002 Parent=0x00000006 SizeRef=824,288 Selected=0x1DCB2623
+          DockNode  ID=0x00000001 Parent=0x00000006 SizeRef=824,1036 CentralNode=1 Selected=0x7BD57D6A
+          DockNode  ID=0x00000002 Parent=0x00000006 SizeRef=824,124 Selected=0x1DCB2623
       DockNode      ID=0x0000000E Parent=0x0000000B SizeRef=1908,858 Split=X Selected=0x418C7449
         DockNode    ID=0x00000012 Parent=0x0000000E SizeRef=902,402 Selected=0x418C7449
         DockNode    ID=0x00000013 Parent=0x0000000E SizeRef=1004,402 Selected=0x6F2B5B04

presets.toml

@@ -0,0 +1,5 @@
+[presets.Default]
+system_prompt = "Not sure yet."
+temperature = 0.0
+top_p = 1.0
+max_output_tokens = 4096

src/app_controller.py

@@ -822,7 +822,7 @@ class AppController:
   self.ui_auto_add_history = disc_sec.get("auto_add", False)
   self.ui_global_system_prompt = self.config.get("ai", {}).get("system_prompt", "")
   
-  self.preset_manager = presets.PresetManager(Path(self.active_project_path) if self.active_project_path else None)
+  self.preset_manager = presets.PresetManager(Path(self.active_project_path).parent if self.active_project_path else None)
   self.presets = self.preset_manager.load_all()
   self.ui_global_preset_name = ai_cfg.get("active_preset")
   self.ui_project_preset_name = proj_meta.get("active_preset")
@@ -1793,6 +1793,8 @@ class AppController:
    self.max_tokens = preset.max_output_tokens
 
  def _cb_save_preset(self, name, content, temp, top_p, max_tok, scope):
+  if not name or not name.strip():
+   raise ValueError("Preset name cannot be empty or whitespace.")
   preset = models.Preset(
    name=name,
    system_prompt=content,

src/gui_2.py

@@ -409,13 +409,13 @@ class App:
     if exp:
      if imgui.collapsing_header("Provider & Model"):
       self._render_provider_panel()
+     if imgui.collapsing_header("System Prompts"):
+      self._render_system_prompts_panel()
      if imgui.collapsing_header("Token Budget"):
       self._render_token_budget_panel()
      self._render_cache_panel()
      self._render_tool_analytics_panel()
      self._render_session_insights_panel()
-     if imgui.collapsing_header("System Prompts"):
-      self._render_system_prompts_panel()
 
     imgui.end()
    if self.show_windows.get("MMA Dashboard", False):
@@ -864,8 +864,12 @@ class App:
  def _render_preset_manager_modal(self) -> None:
   if not self.show_preset_manager_modal: return
   imgui.open_popup("Preset Manager")
-  if imgui.begin_popup_modal("Preset Manager", True, imgui.WindowFlags_.always_auto_resize)[0]:
-   imgui.begin_child("preset_list_area", imgui.ImVec2(250, 600), True)
+  opened, self.show_preset_manager_modal = imgui.begin_popup_modal("Preset Manager", self.show_preset_manager_modal)
+  if opened:
+   try:
+    avail = imgui.get_content_region_avail()
+    imgui.begin_child("preset_list_area", imgui.ImVec2(250, avail.y), True)
+    try:
      preset_names = sorted(self.controller.presets.keys())
      if imgui.button("New Preset", imgui.ImVec2(-1, 0)):
       self._editing_preset_name = ""
@@ -886,9 +890,11 @@ class App:
        self._editing_preset_top_p = p.top_p if p.top_p is not None else 1.0
        self._editing_preset_max_output_tokens = p.max_output_tokens if p.max_output_tokens is not None else 4096
        self._editing_preset_is_new = False
+    finally:
      imgui.end_child()
     imgui.same_line()
-   imgui.begin_child("preset_edit_area", imgui.ImVec2(500, 600), False)
+    imgui.begin_child("preset_edit_area", imgui.ImVec2(0, avail.y), False)
+    try:
      p_name = self._editing_preset_name or "(New Preset)"
      imgui.text_colored(C_IN, f"Editing Preset: {p_name}")
      imgui.separator()
@@ -937,7 +943,9 @@ class App:
      if imgui.button("Close", imgui.ImVec2(120, 0)):
       self.show_preset_manager_modal = False
       imgui.close_current_popup()
+    finally:
      imgui.end_child()
+   finally:
     imgui.end_popup()
 
  def _render_projects_panel(self) -> None:

src/presets.py

@@ -84,6 +84,8 @@ class PresetManager:
    return {"presets": {}}
 
  def _save_file(self, path: Path, data: Dict[str, Any]) -> None:
+  if path.parent.exists() and path.parent.is_file():
+   raise ValueError(f"Cannot save to {path}: Parent directory {path.parent} is a file. The project root seems to be a file.")
   path.parent.mkdir(parents=True, exist_ok=True)
   with open(path, "wb") as f:
    f.write(tomli_w.dumps(data).encode("utf-8"))