[decompose] extract BlockList and EditProfile from ProfileModalController

Co-authored-by: PR0M3TH3AN <[email protected]>

context/CONTEXT_2026-02-19_19-58-00.md

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+# Decomposition Context
+
+- **Task:** Decompose `js/ui/profileModalController.js` (6258 lines).
+- **Reason:** Largest grandfathered file, highly coupled UI logic.
+- **Goal:** Extract "Block List" and "Edit Profile" logic into separate controllers to reduce line count by >200 lines and improve maintainability.
+- **Target Branch:** `unstable` (via `agents/daily/...` branch).
+- **Plan:**
+    1.  Extract `ProfileBlockListController` to manage blocked users list, add/remove blocks.
+    2.  Extract `ProfileEditController` to manage profile editing form, uploads, and saving.
+    3.  Update `ProfileModalController` to delegate to these new controllers.
+
+## Selected Blocks
+
+1.  **Block List Management**:
+    - `populateBlockedList`
+    - `handleAddBlockedCreator`
+    - `handleRemoveBlockedCreator`
+    - `ensureBlockListStatusElement`
+    - `setBlockListLoadingState`
+    - `mutateBlocklist`
+    - Event listeners and DOM cache for block list elements.
+
+2.  **Edit Profile Management**:
+    - `handleEditProfile`
+    - `populateEditPane`
+    - `checkStorageForUploads`
+    - `handleUpload`
+    - `handleSaveProfile`
+    - Event listeners and DOM cache for edit profile elements.