chore(bigmind): rename timestamp badge PNGs to achievement IDs

- Renamed 19 timestamp-named PNGs (20260404_*) to match original
  achievement IDs in profile_builder.py compute_achievements() order:
  first_breath, first_thought, eureka, honest_mind, scholar,
  deep_knowledge, scientist, veteran, on_fire, storyteller,
  night_owl, speed_thinker, first_handshake, birthday, shared_mind,
  frugal_mind, quarter_million, token_millionaire, sniper
- Deleted 2 duplicate/excess timestamp PNGs
- Added image= field to all 19 original _add() calls in
  profile_builder.py so every achievement now has a PNG path
- All 39 achievements (19 original + 20 tiered) now have image fields
- 303/303 tests pass

mcp/bigmind/bigmind/profile_builder.py

@@ -443,101 +443,120 @@ def compute_achievements(user_id: str) -> list[dict]:
     _add("first_breath",      "🌱", "First Breath",
          "Opened the very first session",
          first_session_row is not None, _dt(first_session_row[0]) if first_session_row else None,
-         "Start your first session")
+         "Start your first session",
+         image="/static/achievements/first_breath.png")
 
     _add("first_thought",     "🧠", "First Thought",
          "Formed the first hypothesis",
          first_hyp_row is not None, _dt(first_hyp_row[0]) if first_hyp_row else None,
-         "Add your first hypothesis")
+         "Add your first hypothesis",
+         image="/static/achievements/first_thought.png")
 
     _add("eureka",            "💡", "Eureka",
          "First hypothesis confirmed as true",
          first_confirmed_row is not None, _dt(first_confirmed_row[0]) if first_confirmed_row else None,
-         "Confirm your first hypothesis")
+         "Confirm your first hypothesis",
+         image="/static/achievements/eureka.png")
 
     _add("honest_mind",       "❌", "Honest Mind",
          "First hypothesis refuted — being wrong is a feature",
          first_refuted_row is not None, _dt(first_refuted_row[0]) if first_refuted_row else None,
-         "Have a hypothesis refuted")
+         "Have a hypothesis refuted",
+         image="/static/achievements/honest_mind.png")
 
     _add("scholar",           "📚", "Scholar",
          "Stored 25+ personal facts",
          fact_count >= 25, scholar_date,
-         f"Store 25+ facts (currently: {fact_count})")
+         f"Store 25+ facts (currently: {fact_count})",
+         image="/static/achievements/scholar.png")
 
     _add("deep_knowledge",    "💎", "Deep Knowledge",
          "Amassed 100+ stored facts",
          fact_count >= 100, deep_knowledge_date,
-         f"Store 100+ facts (currently: {fact_count})")
+         f"Store 100+ facts (currently: {fact_count})",
+         image="/static/achievements/deep_knowledge.png")
 
     _add("scientist",         "🔬", "Scientist",
          "Formed 10+ hypotheses — science is prediction",
          hyp_count >= 10, scientist_date,
-         f"Form 10+ hypotheses (currently: {hyp_count})")
+         f"Form 10+ hypotheses (currently: {hyp_count})",
+         image="/static/achievements/scientist.png")
 
     _add("veteran",           "🏆", "Veteran",
          "Completed 50+ sessions — true longevity",
          session_count >= 50, veteran_date,
-         f"Complete 50+ sessions (currently: {session_count})")
+         f"Complete 50+ sessions (currently: {session_count})",
+         image="/static/achievements/veteran.png")
 
     _add("on_fire",           "🔥", "On Fire",
          "5+ sessions in a single day",
          on_fire_row is not None, on_fire_row[0] if on_fire_row else None,
-         "Have 5+ sessions in a single day")
+         "Have 5+ sessions in a single day",
+         image="/static/achievements/on_fire.png")
 
     _add("storyteller",       "📖", "Storyteller",
          "20+ sessions with detailed Tier-2 summaries",
          tier2_count >= 20, storyteller_date,
-         f"Summarize 20+ sessions (currently: {tier2_count})")
+         f"Summarize 20+ sessions (currently: {tier2_count})",
+         image="/static/achievements/storyteller.png")
 
     _add("night_owl",         "🌙", "Night Owl",
          "Started a session after midnight UTC",
          night_owl_row is not None, _dt(night_owl_row[0]) if night_owl_row else None,
-         "Start a session after midnight")
+         "Start a session after midnight",
+         image="/static/achievements/night_owl.png")
 
     _add("speed_thinker",     "⚡", "Speed Thinker",
          "Hypothesis formed and confirmed in the same session",
          speed_thinker_row is not None, _dt(speed_thinker_row[0]) if speed_thinker_row else None,
-         "Form and confirm a hypothesis in one session")
+         "Form and confirm a hypothesis in one session",
+         image="/static/achievements/speed_thinker.png")
 
     # First Handshake — hardcoded: 2026-03-31 (Patrick shared BigMind with Elias)
     _add("first_handshake",   "🤝", "First Handshake",
          "BigMind shared with Elias on 2026-03-31 — the first person outside Patrick to receive it",
          True, "2026-03-31",
-         "Share BigMind with someone")
+         "Share BigMind with someone",
+         image="/static/achievements/first_handshake.png")
 
     _add("birthday",          "🎂", "Birthday",
          "One full year of existence",
          birthday_unlocked, birthday_date,
          birthday_extra or "Complete one full year",
-         extra=birthday_extra)
+         extra=birthday_extra,
+         image="/static/achievements/birthday.png")
 
     # Locked until Phase 3
     _add("shared_mind",       "🌍", "Shared Mind",
          "Phase 3 Tier G — BigMind goes company-wide",
          False, None,
-         "Locked until Phase 3 Tier G is enabled")
+         "Locked until Phase 3 Tier G is enabled",
+         image="/static/achievements/shared_mind.png")
 
     # Token achievements (Feature 6 — suggested by Klaus)
     _add("frugal_mind",       "🪙", "Frugal Mind",
          "Logged the first token efficiency save",
          frugal_row is not None, _dt(frugal_row[0]) if frugal_row else None,
-         "Log your first token save")
+         "Log your first token save",
+         image="/static/achievements/frugal_mind.png")
 
     _add("quarter_million",   "💰", "Quarter Million",
          "250,000 cumulative tokens saved",
          token_total >= 250_000, quarter_million_date,
-         f"Save 250,000+ tokens (currently: {token_total:,})")
+         f"Save 250,000+ tokens (currently: {token_total:,})",
+         image="/static/achievements/quarter_million.png")
 
     _add("token_millionaire", "🏦", "Token Millionaire",
          "1,000,000 cumulative tokens saved",
          token_total >= 1_000_000, millionaire_date,
-         f"Save 1,000,000+ tokens (currently: {token_total:,})")
+         f"Save 1,000,000+ tokens (currently: {token_total:,})",
+         image="/static/achievements/token_millionaire.png")
 
     _add("sniper",            "🎯", "Sniper",
          "Single token save > 500,000 — one massive efficiency win",
          sniper_row is not None, _dt(sniper_row[0]) if sniper_row else None,
-         "Save 500,000+ tokens in a single operation")
+         "Save 500,000+ tokens in a single operation",
+         image="/static/achievements/sniper.png")
 
     # ── Tiered Achievement Badges (20 PNG) ────────────────────────────────────
     # NOTE: conn is already closed above; open a fresh connection for tiered queries