docs(18-01): complete web dashboard foundation plan

- SUMMARY.md with chi v5 router, auth middleware, overview page
- STATE.md updated with position, decisions, metrics
- ROADMAP.md and REQUIREMENTS.md updated

.planning/STATE.md

@@ -3,14 +3,14 @@ gsd_state_version: 1.0
 milestone: v1.0
 milestone_name: milestone
 status: executing
-stopped_at: Completed 17-04-PLAN.md
-last_updated: "2026-04-06T14:50:49.687Z"
+stopped_at: Completed 18-01-PLAN.md
+last_updated: "2026-04-06T15:03:51.830Z"
 last_activity: 2026-04-06
 progress:
   total_phases: 18
-  completed_phases: 15
-  total_plans: 90
-  completed_plans: 88
+  completed_phases: 16
+  total_plans: 91
+  completed_plans: 89
   percent: 20
 ---
 
@@ -102,6 +102,7 @@ Progress: [██░░░░░░░░] 20%
 | Phase 16 P01 | 4min | 2 tasks | 6 files |
 | Phase 17 P01 | 3min | 2 tasks | 4 files |
 | Phase 17 P04 | 3min | 2 tasks | 4 files |
+| Phase 18 P01 | 3min | 2 tasks | 9 files |
 
 ## Accumulated Context
 
@@ -156,6 +157,7 @@ Recent decisions affecting current work:
 - [Phase 16]: URLhaus tag lookup with payload endpoint fallback
 - [Phase 17]: telego v1.8.0 promoted from indirect to direct; context cancellation for graceful shutdown; rate limit 60s scan/verify/recon, 5s others
 - [Phase 17]: Separated format from send for testable notifications without telego mock
+- [Phase 18]: html/template over templ for v1; Tailwind CDN; nil-safe handlers; constant-time auth comparison
 
 ### Pending Todos
 
@@ -170,6 +172,6 @@ None yet.
 
 ## Session Continuity
 
-Last session: 2026-04-06T14:34:18.710Z
-Stopped at: Completed 17-04-PLAN.md
+Last session: 2026-04-06T15:03:51.826Z
+Stopped at: Completed 18-01-PLAN.md
 Resume file: None