docs: archive 4 completed project docs, update stale references

Archived to documentation/history/:
- PROJECT__AE_Firefly_Theme_Repair_SUMMARY.md (complete)
- PROJECT__AE_Pres_Mgmt_Session_view_refactor_2026-02.md (resolved 2026-02-26)
- PROJECT__AE_Access_Control_UX.md (all steps done 2026-03-11)
- PROJECT__AE_combined_front_back_Docker.md (complete 2026-03-10)

Pre-archive housekeeping:
- CLAUDE.md: removed 3 resolved active issues; replaced stale session bug doc link with Badges Task 4.0 doc
- AE__Architecture.md: corrected stale "TipTap marked for removal" note — both editors are active
- PROJECT__AE_Firefly_Theme_Repair_SUMMARY.md: added archival note re element_modal_v1 retirement

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

documentation/history/PROJECT__AE_Firefly_Theme_Repair_SUMMARY.md

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+**AE Firefly Theme Repair — Summary (Recovery & Integration Complete)**
+
+- **Summary**: Investigation, targeted repair, and successful integration of the AE Firefly theme family and key UI components. This document records the final resolution, the migration of the Svelte 5 Modal component, and the validation of the `ae_app_3x_llm` branch as the project's stable baseline.
+
+### 1. Root Cause Resolution (Themes)
+- **Variables outside selectors**: Fixed. Custom-property declarations in `src/ae-firefly*.css` were moved into proper `[data-theme='AE_Firefly*']` selector blocks.
+- **Variable precedence**: Resolved by enforcing `--background: ... !important` within the theme-specific selectors to ensure they override global `:root` defaults.
+- **Files Repaired**: 
+  - `src/ae-firefly.css`
+  - `src/ae-firefly-steelblue.css`
+  - `src/ae-firefly-indigo.css`
+  - `src/ae-firefly-rainbow.css`
+
+### 2. Actions Taken (Recovery Phase)
+- **Surgical Integration**: Selective harvesting of "90% done" work from WIP branches while preserving the integrity of the Lucide migration and Svelte 5 baseline.
+- **`element_modal_v1.svelte`**: 
+  - Successfully imported from `wip-modal-fix-attempt`.
+  - **Full Refactor**: Migrated from deprecated `svelte/legacy` and `<slot>` patterns to **Svelte 5 Snippets** and `{@render}` tags.
+  - Verified and tested as the new standard modal component.
+- **Selective Vetting**:
+  - **Abandoned**: `element_input_v2.svelte` and legacy Badge View v1 (rejected due to legacy FontAwesome regressions and high error counts).
+  - **Removed**: Redundant `element_data_store_v2.svelte` (superseded by `v3`).
+  - **Kept**: Clean, Lucide-based versions of all core components already present on `ae_app_3x_llm`.
+
+### 3. Repository State (Final Validation)
+- **Baseline**: `ae_app_3x_llm` is now the unified, verified "known-good" state.
+- **Validation**: `npx svelte-check` performed on the merged state returned **0 errors and 0 warnings**.
+- **Cleanup**: Temporary integration branches have been deleted.
+- **Backups**: `wip-modal-fix-attempt` and `wip/theme-fix` remain as reference points but are no longer active.
+
+### 4. Merged Files (Key Updates)
+- `src/ae-firefly*.css` (Repaired themes)
+- `src/lib/elements/element_modal_v1.svelte` (New Svelte 5 Modal)
+- `documentation/PROJECT__AE_Firefly_Theme_Repair_SUMMARY.md` (This document)
+
+### 5. Final Status
+- **Status**: **COMPLETE / STABLE**
+- **Branch**: `ae_app_3x_llm`
+- **Verification**: Verified via `svelte-check` and theme inspections.
+
+---
+*Prepared by: Gemini CLI (March 17, 2026)*
+
+---
+*Archival note (2026-03-20): `element_modal_v1.svelte` (referenced in §2 as "new standard modal") was subsequently retired — it had zero active importers. Modal usage in the codebase relies on Flowbite `<Modal>` component. See `AE__UI_Component_Patterns.md` §11.*