Phase 1 MVP - Complete implementation

- Login with JWT and refresh token rotation
- Dashboard with projects cards
- ProjectView with TreeView navigation
- DocumentView with markdown editor and auto-save
- Tag management (create, assign, remove)
- Dark mode CSS variables
- Security fixes applied (logout to backend, createDocument endpoint)

dist/assets/Dashboard-bZb0kvk2.css

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+.dashboard[data-v-a5d62dba]{max-width:1200px;margin:0 auto;padding:2rem}.dashboard__header[data-v-a5d62dba]{display:flex;align-items:center;justify-content:space-between;margin-bottom:2rem}.dashboard__title[data-v-a5d62dba]{margin:0;font-size:1.75rem;font-weight:600;color:var(--text-primary)}.dashboard__subtitle[data-v-a5d62dba]{margin:.25rem 0 0;font-size:.9375rem;color:var(--text-secondary)}.dashboard__loading[data-v-a5d62dba]{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1rem;padding:4rem;color:var(--text-secondary)}.dashboard__spinner[data-v-a5d62dba]{width:32px;height:32px;border:3px solid var(--border);border-top-color:var(--accent);border-radius:50%;animation:spin-a5d62dba .8s linear infinite}@keyframes spin-a5d62dba{to{transform:rotate(360deg)}}.dashboard__empty[data-v-a5d62dba]{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1rem;padding:4rem 2rem;text-align:center;color:var(--text-secondary)}.dashboard__empty h2[data-v-a5d62dba]{margin:0;font-size:1.25rem;color:var(--text-primary)}.dashboard__empty p[data-v-a5d62dba]{margin:0;max-width:320px}.dashboard__grid[data-v-a5d62dba]{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:1.25rem}.project-card[data-v-a5d62dba]{display:flex;align-items:flex-start;gap:1rem;padding:1.25rem;background:var(--bg-primary);border:1px solid var(--border);border-radius:12px;cursor:pointer;transition:all .15s}.project-card[data-v-a5d62dba]:hover{border-color:var(--accent);box-shadow:0 4px 12px #0000001a}.project-card__icon[data-v-a5d62dba]{flex-shrink:0;width:48px;height:48px;display:flex;align-items:center;justify-content:center;background:var(--bg-secondary);border-radius:10px;color:var(--accent)}.project-card__content[data-v-a5d62dba]{flex:1;min-width:0}.project-card__name[data-v-a5d62dba]{margin:0;font-size:1rem;font-weight:600;color:var(--text-primary)}.project-card__desc[data-v-a5d62dba]{margin:.375rem 0 0;font-size:.875rem;color:var(--text-secondary);line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.project-card__date[data-v-a5d62dba]{margin:.5rem 0 0;font-size:.8125rem;color:var(--text-secondary)}.project-card__arrow[data-v-a5d62dba]{flex-shrink:0;color:var(--text-secondary);opacity:0;transition:opacity .15s}.project-card:hover .project-card__arrow[data-v-a5d62dba]{opacity:1}.form__field[data-v-a5d62dba]{margin-bottom:1.25rem}.form__field[data-v-a5d62dba]:last-child{margin-bottom:0}.form__label[data-v-a5d62dba]{display:block;margin-bottom:.5rem;font-size:.875rem;font-weight:500;color:var(--text-primary)}.form__input[data-v-a5d62dba],.form__textarea[data-v-a5d62dba]{width:100%;padding:.75rem 1rem;background:var(--bg-secondary);border:1px solid var(--border);border-radius:8px;font-size:.9375rem;font-family:inherit;color:var(--text-primary);outline:none;transition:border-color .15s,box-shadow .15s;box-sizing:border-box}.form__input[data-v-a5d62dba]::placeholder,.form__textarea[data-v-a5d62dba]::placeholder{color:var(--text-secondary)}.form__input[data-v-a5d62dba]:focus,.form__textarea[data-v-a5d62dba]:focus{border-color:var(--accent);box-shadow:0 0 0 3px #6366f11a}.form__textarea[data-v-a5d62dba]{resize:vertical;min-height:80px}