[decompose] extract BlockList and EditProfile from ProfileModalController

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

todo/TODO_2026-02-19_19-58-00.md

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+# Decomposition Todo
+
+- [ ] Create `js/ui/profileModal/ProfileBlockListController.js`
+    - [ ] Import dependencies (`devLogger`, `userLogger`, `FALLBACK_PROFILE_AVATAR`).
+    - [ ] Implement `cacheDomReferences`.
+    - [ ] Implement `registerEventListeners`.
+    - [ ] Move `populateBlockedList` logic.
+    - [ ] Move `mutateBlocklist` logic.
+    - [ ] Move helper methods (`ensureBlockListStatusElement`, `setBlockListLoadingState`).
+- [ ] Create `js/ui/profileModal/ProfileEditController.js`
+    - [ ] Import dependencies (`buildProfileMetadataEvent`, `buildPublicUrl`, `buildR2Key`).
+    - [ ] Implement `cacheDomReferences`.
+    - [ ] Implement `registerEventListeners`.
+    - [ ] Move `populateEditPane` logic.
+    - [ ] Move `handleSaveProfile` logic.
+    - [ ] Move `handleUpload` logic.
+- [ ] Update `js/ui/profileModalController.js`
+    - [ ] Import new controllers.
+    - [ ] Instantiate in `constructor`.
+    - [ ] Call `cacheDomReferences` and `registerEventListeners`.
+    - [ ] Delegate method calls (wrappers or direct usage).
+    - [ ] Remove extracted code.
+- [ ] Verification
+    - [ ] `npm run lint`
+    - [ ] `node scripts/run-targeted-tests.mjs tests/profile-modal-controller.test.mjs`
+    - [ ] Verify line count reduction.